Spurs midfielder Jenas ‘can join QPR’ as Kenny speculation continues

first_imgTottenham have told midfielder Jermaine Jenas he can join QPR, according to the Daily Express.The England international is one of several players tipped to leave White Hart Lane this summer, with Rangers reported to be interested in him.Like the Express, The Sun claim that Rangers want to sign Taye Taiwo following his loan spell at Loftus Road but are likely to be snubbed, with Benfica tipped to buy the Nigerian from AC Milan.The Sun also report Paddy Kenny’s desire to discuss his future with QPR amid reports the club could sign another keeper.Related West London Sport story: QPR to discuss future of keeper KennyKenny has been strongly linked with a move to Leeds as he played under Elland Road boss Neil Warnock at Rangers, Sheffield United and Bury.The Yorkshire Post suggest Leeds’ apparent bid to sign him is in doubt because Rangers are reluctant to sell before acquiring another keeper.Click here for Tuesday’s QPR quizFollow West London Sport on TwitterFind us on Facebooklast_img read more

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How to Tell an Evolutionary Story

first_imgThanks to Science Daily, we now know that “Evolutionary Origin Of Mammalian Gene Regulation Is Over 150 Million Years Old.”  The proof is easy.  It is so easy, in fact, that no proof is necessary.  One can merely assume it is true.  Trust them; they are scientists, after all.Here is how the E word evolution was used in the article:The findings, reported online in Nature Genetics, have provided new insights into the evolution of genomic or parental imprinting and epigenetic regulation in mammals.Imprinting is thought to have evolved because of genetic conflict that influences the allocation of resources from parents to offspring.The apparent absence of genomic imprinting in monotremes and presence in eutherians and marsupials suggests that imprinting has evolved at the boundary of monotremes and therians’ divergence. Interestingly, imprinting evolution paralleled the apparition of the placenta and implantation.Hence, it is possible that imprinting and placentation co-evolved in the therian ancestor.The next stage is to look for the IGF2-H19 locus in another branch of mammals’ evolution…Recent evidence suggests that therians diverged from the egg-laying monotremes like the platypus approximately 180 million years ago, and then split into the eutherian and marsupials infra-classes around 150 million years ago.Hence the … consortium will concentrate its efforts in obtaining the sequence of the monotreme IGF2 locus to provide further insights into the imprinting evolution and the mysteries of gene regulation in these curious creatures which carry mammalian, bird-like and reptilian characteristics.Apparently the members of the consortium felt it superfluous to explain how the gene regulatory toolkit emerged through a random process of mutation and selection.  Science Daily was satisfied.  It summarized the paper by saying, “Scientists … have found that a complex, highly conserved and extremely important mechanism of controlling genes is over 150 million years old.”Evolution is such a wonderful story.  It explains everything.  It conjures up such marvelous apparitions of mythical worlds in the far distant past.  Evolution is so versatile.  It mixes things up rapidly but then saves other things for 150 million years.  Who would have ever thought up such things.  Aren’t you glad we have the shamans to comfort us with their hidden wisdom?  Think how hard life would be if we actually had to think for ourselves.(Visited 8 times, 1 visits today)FacebookTwitterPinterestSave分享0last_img read more

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Project announced ahead of 2017 by-election yet to take off in Odisha

first_imgTwo years after Odisha Chief Minister Naveen Patnaik announced one of the most ambitious irrigation projects in the State, the government has not made any expenditure for its execution.Just before the Bijepur by-election in 2017, the government had announced the State’s first underground irrigation project — Gangadhar Meher Lift Canal System.In response to an RTI query, the government said that the tendering process for the project is yet to be completed.“The administrative sanction for the project, which entails an investment of ₹1,340.55 crore, has been approved by the government. In 2018-19 and 2019-20 budget provision of ₹200 crore and ₹100 crore has been made,” the government said.As per the plan, water will be drawn from Hirakud Dam through Bargarh Main Canal. Over 70 villages to benefitThe water will travel 17.64 km through the pipeline up to Barihapali Secondary Reservoir. From Barihapali reservoir, the water will be delivered to farmers in the designed ayacut area, including 74 villages in Bijepur block. There will be a mix of underground gravity and pressure pipe distribution network with outlets every 4.5 hectare patch of land.It is estimated that an area of about 25,600 hectares would be irrigated in the three blocks. Though the project was to be implemented over five years, no expenditure has been made. “The announcement was meant to deceive voters ahead of the Bijepur polls in 2017 when the BJD and the BJP were locked in a bitter contest. Had the government been serious about the project, it would have been fast-tracked,” alleged Pradip Pradhan, RTI activist.last_img read more

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Russian gold medalist disqualified for Sochi Olympics doping

first_imgFILE- In this Sunday, Feb. 23, 2014 file photo, Russia’s gold medal winner Alexander Legkov gestures to the crowd during the flower ceremony of the men’s 50K cross-country race at the 2014 Winter Olympics in Krasnaya Polyana, Russia. The International Olympic Committee said Wednesday, Nov. 1st, 2017, cross-country skier Alexander Legkov has been disqualified from all his events at Sochi. Legkov won an individual gold medal and relay silver. (AP Photo/Gregorio Borgia, File)GENEVA — In a landmark verdict that indicates Russia conspired to run a doping program at the 2014 Sochi Olympics, a cross-country skier who won a gold medal was disqualified by the IOC on Wednesday.All results for Alexander Legkov in Sochi were wiped from the record and he was banned for life from attending another Olympics.ADVERTISEMENT Read Next Typhoon Kammuri accelerates, gains strength en route to PH However, McLaren’s investigation said the Russian doping program was enabled by the country’s government, anti-doping agency and testing labs, plus sports governing bodies.The second cross-country skier who was disqualified and banned, Evgeniy Belov, did not win a medal.Lawyers for the two skiers disputed the IOC panel’s ruling while accepting a doping program was in place.“So there is neither Prof. McLaren’s assertion nor proof that individual athletes have really participated in the system that has undoubtedly existed,” German law firm Wieschemann said in a statement.Russia’s sports minister during the Sochi Olympics, Vitaly Mutko, told the Russian state news agency Tass that the IOC ruling “inspires great alarm and bewilderment.”“The correct and just decision is to file an appeal with CAS (the Court of Arbitration for Sport),” said Mutko, who is now a Deputy Prime Minister and heads the organizing committee for soccer’s 2018 World Cup.The two skiers’ cases are the first from Sochi to be judged by the IOC panel created to verify McLaren’s work. The Canadian law professor had himself been appointed by WADA to examine claims by Grigory Rodchenkov, the former head of Russia’s WADA-authorized drug-testing laboratories.Rodchenkov, who is now in a witness protection program in the United States, said he switched tainted urine samples for clean ones at the Sochi lab with help from what he believed was the Russian security service.The verdicts announced Wednesday were the first from six cross-country skiers scheduled to have hearings at IOC headquarters this week. They include Maxim Vylegzhanin, who won one of his three silver medals in the Russian sweep of the 50-kilometer event.“Additional decisions from these first hearings will be communicated in the coming days,” the IOC said.Other cases involving Russian athletes in different Winter Olympic sports have also been handed over to the IOC panel, chaired by Swiss lawyer Denis Oswald.“The Oswald Commission has announced that all hearings for active athletes who could qualify for the Olympic Winter Games PyeongChang 2018 will be completed by the end of November,” the IOC said. Stronger peso trims PH debt value to P7.9 trillion MOST READ A second Russian cross-country skier was also disqualified and banned by the International Olympic Committee on Wednesday, while cases implicating 26 more Russian athletes in a Sochi doping conspiracy arepending.With calls to ban Russia’s team from next year’s Pyeongchang Olympics likely to increase, the IOC’sexecutive board will meet next month to discuss the matter.FEATURED STORIESSPORTSWATCH: Drones light up sky in final leg of SEA Games torch runSPORTSSEA Games: Philippines picks up 1st win in men’s water poloSPORTSMalditas save PH from shutoutThe IOC disciplinary panel did not have a positive doping test from Legkov but used evidence of cover-ups and tampering of sample bottles that was first gathered last year by World Anti-Doping Agency investigator Richard McLaren.“The IOC showed its determination to protect clean athletes from the very beginning of the case,” said the Olympic body, whose board meets Dec. 5-7 in Lausanne, Switzerland. View comments CPP denies ‘Ka Diego’ arrest caused ‘mass panic’ among S. Tagalog NPA Spurs bring back Tony Parker after rehab stint in G-League LATEST STORIEScenter_img QC cops nab robbery gang leader, cohort Japan ex-PM Nakasone who boosted ties with US dies at 101 The 34-year-old Legkov also has two medals from the world championships — a silver and a bronze in relay races — plus nine individual victories on the World Cup circuit. He now faces a ban by the International Ski Federation.Skiing’s governing body said its doping panel will wait until the IOC gives all six verdicts, which it expected next week. FIS set a target of Nov. 24 — when the cross-country World Cup season starts — to make progress.Legkov also threatened to file a libel lawsuit against Rodchenkov, the former lab director who is the key witness to the Sochi conspiracy claims.At his news conference last year, Legkov spoke alongside then-Deputy Sports Minister Yuri Nagornykh, who stepped down after he was accused by McLaren of helping to cover up doping.The Russian government says it has never supported drug use by athletes.Russia now risks losing its place atop the Sochi medal tables, with second-place Norway set to be upgraded for medals in each of the men’s cross-country ski events affected by doping. Norwegians Petter Northug and Martin Johnsrud Sundby could each be awarded two medals. The IOC panel did not give details of the evidence Wednesday. McLaren has said that glass sample bottles were scratched when broken into, and in some cases clean urine used to cover up doping was tampered with, revealing unnatural levels of salt and even DNA from the wrong gender.Legkov’s gold medal was a marquee Russian success at the Sochi Olympics, which was a national priority for President Vladimir Putin and cost $51 billion to prepare for and host.The cross-country skier won gold in the individual 50-kilometer freestyle race in a Russian podium sweep on the last day of competition. The Russian trio received their medals in the main Olympic Stadium during the closing ceremony. Legkov had earlier taken silver in the 4×10-kilometer relay.Legkov said last year he had never failed a doping test, claiming he was tested so often that he couldn’t have doped without being caught.“You’d have to be a complete kamikaze to do that in Russia if you’re an athlete representing our nation,” Legkov said then.ADVERTISEMENT Don’t miss out on the latest news and information. Kammuri turning to super typhoon less likely but possible — Pagasa John Lloyd Cruz a dashing guest at Vhong Navarro’s wedding Brace for potentially devastating typhoon approaching PH – NDRRMC Protesters burn down Iran consulate in Najaf PLAY LIST 01:37Protesters burn down Iran consulate in Najaf01:47Panelo casts doubts on Robredo’s drug war ‘discoveries’01:29Police teams find crossbows, bows in HK university01:35Panelo suggests discounted SEA Games tickets for students02:49Robredo: True leaders perform well despite having ‘uninspiring’ boss02:42PH underwater hockey team aims to make waves in SEA Gameslast_img read more

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Blackwater owner hoping for the best amid lockout fears

first_imgThe impasse between the PBA Board of Governors remain, but Blackwater team owner Dioceldo Sy observed that cooler heads have prevailed since the two sides’ war of words two weeks ago.Sy is also expecting the search for the next PBA commissioner to commence soon.ADVERTISEMENT Don’t miss out on the latest news and information. MOST READ With the fire between the Board of Governors still yet to be doused, expressed worries about a possibility of a lockout in the PBA’s 43rd season.Sy shared that the possibility of the seven teams excusing themselves from playing was initially discussed when the status of Narvasa’s commissionership first came up.“When they were fighting for the commissioner, we said that if they force it, the seven teams might not play, so there’s gonna be a lockout because the five other teams cannot play on their own,” he said.But he is hopeful that the whatever issue affecting the league would be resolved in time for the opening of the 43rd season.“Let’s hope for the best. Let’s just hope that there won’t be any lockout. We don’t want to see something like the NBA lockout a few years ago and there’s no tournament. We need to give fans assurance that by December 17, the PBA should be on the roll already,” he said.ADVERTISEMENT Stronger peso trims PH debt value to P7.9 trillion Japan ex-PM Nakasone who boosted ties with US dies at 101 QC cops nab robbery gang leader, cohort Read Next “Now, it’s no longer that heated in the board room. The five teams are more or less agreeing to have a search committee on the new commissioner,” he said.“I heard there are plans to have a search committee to see who are available candidates and I heard the Board might be working on it. Maybe by next week, there should be a good news that will come up.”FEATURED STORIESSPORTSWATCH: Drones light up sky in final leg of SEA Games torch runSPORTSSEA Games: Philippines picks up 1st win in men’s water poloSPORTSMalditas save PH from shutoutBut the annual planning held in Los Angeles, where it was expected that the issue regarding Chito Narvasa’s fate as commissioner would be resolved, was for naught with four governors–including chairman Ramoncito Fernandez of NLEX—absent from the trip.Blackwater is with the seven-team bloc, together with NLEX, TNT, Meralco, Alaska, Rain or Shine, and Phoenix calling for the head of commissioner Chito Narvasa, while the five others — San Miguel, Ginebra, Star, GlobalPort, and Kia, have all backed the beleaguered league executive. Trending Articles PLAY LIST 00:50Trending Articles02:49Robredo: True leaders perform well despite having ‘uninspiring’ boss00:50Trending Articles01:37Protesters burn down Iran consulate in Najaf01:47Panelo casts doubts on Robredo’s drug war ‘discoveries’01:29Police teams find crossbows, bows in HK university01:35Panelo suggests discounted SEA Games tickets for students02:42PH underwater hockey team aims to make waves in SEA Gamescenter_img Brace for potentially devastating typhoon approaching PH – NDRRMC LATEST STORIES Young England stifle Neymar’s Brazil Kammuri turning to super typhoon less likely but possible — Pagasa Typhoon Kammuri accelerates, gains strength en route to PH John Lloyd Cruz a dashing guest at Vhong Navarro’s wedding CPP denies ‘Ka Diego’ arrest caused ‘mass panic’ among S. Tagalog NPA View commentslast_img read more

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Yang Ming Swings Back to Profit

first_imgzoom Taiwan-based shipping company Yang Ming managed to close the third quarter of this year with a profit of TWD 1.26 billion (USD 42 million), compared with losses recorded in the same period of 2016.As explained, Yang Ming’s improved financial status can be attributed to “a combination of strategic actions and initiatives designed to control operating costs and the concerted efforts of its team members worldwide”.Coupled with a support from the company’s major shareholders, Yang Ming has reversed the losses of the previous quarters. To remind, the company posted net losses of TWD 901 million and TWD 445 million in the first and second quarter of 2017, respectively.Yang Ming’s Q3 consolidated revenues were TWD 35.78 billion, surging 23.4% compared with the corresponding period last year when the company reported revenues of TWD 28.99 billion.Volumes in the third quarter of this year totaled 1.24 million TEUs, a jump of 11.1% year over year.In addition, the company’s earnings per share were TWD 0.7 and its net operating income year-to-date was TWD 0.5 billion. The company’s accumulated loss after tax for the same period was TWD 82 million, a 99% reduction compared to the same period last year.As Yang Ming’s financial health continues to recover, the company said it looks for opportunities to expand operations and improve its service network.In Southeast Asia, Yang Ming intends to partner up with the Taiwan International Port Corporation to jointly invest in Indonesia in an effort to upgrade shipping and logistics infrastructure. Additionally, Yang Ming will be establishing a Regional Operating Center to oversee the company’s operations in the Mediterranean and the Black Sea.last_img read more

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Lily Cole Urges World Leaders To Take Action On Global Illiteracy Crisis

first_imgInternational actress, activist and businesswoman Lily Cole yesterday gave a speech to British politicians and American embassy representatives at the United Kingdom Houses of Parliament calling for urgent action to tackle the global illiteracy crisis, which afflicts one in 10 people alive today and means that one in four American children leave primary school unable to read or write.Lily Cole arrives at the Houses of Parliament in Westminster, London, to give a speech on behalf of Project LiteracyShe unveiled the ‘Alphabet of Illiteracy’, a new body of evidence showing illiteracy is the root cause of almost every major problem humanity faces, from A-Z. The full Alphabet can be explored here, but examples, drawn from a wealth of academic research and data, include:Gender inequality • Women are disproportionately likely to be unable to read or write: two thirds of the world’s illiterate adults (520 million) are female. • Each additional year of schooling a girl receives increases her earning ability by 10-20% and reduces the probability of postnatal child mortality by 10%.Infant mortality• Four to six years of literacy and education for women can lead to a 20% drop in infant deaths.Female Genital Mutilation (FGM)• In studies of female genital mutilation, more than 80% of the victims and up to 92% of mothers were illiterate and unemployed. • Educated and literate women more often support the discontinuation of FGM than uneducated/low-educated and illiterate peers.Radicalization• Studies of Boko Haram’s impact in Nigeria ranked illiteracy as the second highest factor in preventing youth radicalisation.Famous for her vocal belief in the importance of education, Cole was speaking in her role as Global Ambassador for Project Literacy – a campaign backed by 40 charities and education organizations, including UNESCO, the Bill, Hillary, and Chelsea Clinton Foundation, Microsoft and the World Literacy Foundation, convened by founding partner, Pearson.In her speech, Lily Cole said: “In our alphabet, A is for AIDS, because if you can’t read or write you are five times less likely to understand how people contract HIV. B is for bloodshed, because the rate of violent crimes such as murder and sexual assaults is almost double among the illiterate population. C is for child brides, because if all women had a primary education, child marriages would reduce by a sixth.”Explaining her support for the campaign, Cole said: “Illiteracy is not just a ‘developing world’ problem. It’s affecting children in the U.K and U.S, with one in four American children growing up unable to read or write. Illiteracy is also statistically related to many other global development issues. If we want to tackle many of the global challenges our world faces, we need to begin by properly addressing education and literacy.”The research forms part of a wider campaign to raise awareness about the devastating impact of illiteracy and to encourage the United Nations to create a more measureable illiteracy target within the Sustainable Development Goals.Dr. Dan Wagner, UNESCO Chair in Learning and Literacy at the University of Pennsylvania, said: “Literacy is a key component in achieving the UN’s sustainable development goals. Without literacy, each of the 17 goals will be limited by the inability of citizens to be sufficiently informed on key issues, and less empowered to take action. There is a strong argument that tackling illiteracy and low literacy, as a ‘foundational’ social problem, would pay greater dividends than tackling each issue separately.”Kate James, Chief Corporate Affairs Officer for Pearson and spokesperson for Project Literacy, said: “Illiteracy is a global challenge and we all need to pull together if we are to combat its devastating impact. Our hope is that Project Literacy will provide the umbrella for a global coalition of charities, businesses, and government who together can ensure literacy helps solve some of the world’s most pressing problems.”People can show their support by signing the Project Literacy petition at projectliteracy.com/petition. Created on behalf of the 757 million people around the world who cannot read or write, Project Literacy aims to gather one million signatures by International Literacy Day in September, when they will present it to the United Nations.To mark the launch, Project Literacy has created a film that outlines the serious issues that lie at the core of the Alphabet of Illiteracy, which improved literacy can positively impact. You can view the short film here.last_img read more

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Ohio State mens basketball drops Nebraska 6356

The Ohio State men’s basketball team defeated Nebraska in Lincoln Saturday night, 63-56, to keep a pair of streaks alive. With the win, the No. 11-ranked Buckeyes extended their winning streak to four games. In the process, OSU advanced to 17-4 on the season and 7-2 in Big Ten play. The Buckeyes also remain perfect against their newest conference foe. Since the Huskers joined the Big Ten in 2011, OSU is 4-0 against Nebraska. Nebraska proved to be a much tougher opponent than it was in the teams’ first meeting, in which OSU dispatched the Huskers, 70-44, at the Schottenstein Center. This time around, Nebraska gave the Buckeyes all they could handle for a good portion of the first half, and it even led a couple of times. In the closing minutes of the half, however, OSU mounted a 15-4 run, which seemed to drain some energy out of the home crowd and the Huskers, while giving OSU all the momentum. The Buckeyes carried that momentum into the second half, and expanded their lead to as much as 15 points. But the resilient Huskers would not go away. Nebraska slowly chipped away at OSU’s lead, in large part because of senior center and defensive anchor Andre Almeida. The 6-foot-11, 314-pound Almeida made it difficult for OSU to find easy looks in the paint, and as the Buckeyes struggled to find scores, Nebraska cut the margin to five points with just over a minute left to play. The Huskers couldn’t knock down a few open shots in the closing minute, however, and OSU put the game away from the free throw line. Nebraska falls to 11-12 on the season and to 2-8 in Big Ten play. The Buckeyes received sporadic production from junior forward Deshaun Thomas, who scored 15 points but struggled while doing so. The Big Ten’s leading scorer connected on just 6-of-18 shots, as he was constantly doubled-teamed and harassed by Husker defenders. While Thomas was fairly inefficient with his scoring, Lenzelle Smith Jr. was anything but. The junior guard made all six of his field goal attempts for a game-high and season-high 21 points. After struggling to put away one of the Big Ten’s bottom feeders, the Buckeyes will now move into what could be their toughest week of the season. The Buckeyes will embark upon a pair of contests, against No. 1 Michigan on Feb. 5 and No. 3 Indiana on Feb. 10. This article has been revised to reflect the following correction: Correction: February 3, 2013 An earlier version of this story misspelled Andre Almeida’s name in the seventh paragraph. read more

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Three superEarth exoplanets orbiting nearby star discovered

first_img This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only. Citation: Three ‘super-Earth’ exoplanets orbiting nearby star discovered (2017, September 13) retrieved 18 August 2019 from https://phys.org/news/2017-09-super-earth-exoplanets-orbiting-nearby-star.html Kepler is the most prolific planet-hunting telescope. The spacecraft has discovered more than 2,300 exoplanets to date. After the failure of its two reaction wheels in 2013, the mission was repurposed as K2 to perform high-precision photometry of selected fields in the ecliptic. Since then, the revived Kepler spacecraft has detected nearly 160 extrasolar worlds.Now, a team of astronomers led by Joseph Rodriguez of the Harvard-Smithsonian Center for Astrophysics (CfA) in Cambridge, Massachusetts, reports the finding of three new exoplanets from the data provided by K2. The Kepler spacecraft observed GJ 9827 from December 2016 to March 2017, during its Campaign 12. These observations allowed the team to discover that this nearby late K-type dwarf star is orbited by three alien worlds. The newly found planets were classified as “super-Earths” as they have masses higher than Earth’s but lower than that of Solar System’s gas giants.”In this paper, we present the discovery of three transiting planets orbiting the nearby star GJ 9827 using data from the K2 mission,” the researchers wrote in the paper.Located some 100 light years away from the Earth, GJ 9827 is a bright star of spectral type K6V. It has a radius of about 0.63 solar radii and is approximately 15 percent less massive than our Sun. The scientists found that the star is circled by three planets, designated GJ 9827 b, c and d, located about 0.02, 0.04 and 0.06 AU from the host respectively.According to the paper, GJ 9827 b has a radius of 1.64 Earth radii but its precise mass remains uncertain. The researchers estimate that its mass should be between 3.5 and 4.26 Earth masses. The planet orbits its parent star in approximately 1.21 days and has an equilibrium temperature of 1,119 K.With a radius of 1.29 Earth radii and an estimated mass of about 2.5 Earth masses, GJ 9827 c is smallest and less massive planets of the newly discovered trio. The exoplanet has an equilibrium temperature of 774 K and an orbital period of 3.65 days.GJ 9827 d is about two times larger than the Earth and at least five times as massive as our planet. This alien world has an equilibrium temperature of 648 K and it takes it 6.2 days to fully orbit its host star.The new discovery reported by Rodriguez’s team makes GJ 9827 the closest exoplanet host discovered by K2 mission to date. The star’s proximity and brightness as well as similarity in the size of planets make the system an excellent target for further atmospheric studies. The scientists hope that future space observatories like the James Webb Space Telescope (JWST) could provide important insights about atmospheric properties of the three newly discovered extrasolar worlds. (Top) The full K2 light curve of GJ 9827 from Campaign 12, corrected for systematics using the technique described in Vanderburg & Johnson (2014) and Vanderburg et al. (2016b). (Middle) The corrected K2 lightcurve with best-fit low frequency variability removed. (Bottom) Phase folded K2 light curves of GJ 9827 b, c. and d. The observations are plotted in open black circles, and the best fit models are plotted in red. Credit: Rodriguez et al., 2017. (Phys.org)—NASA’s prolonged Kepler mission, known as K2, has made another significant discovery, revealing the existence of three new exoplanets. The newly found alien worlds circle the nearby star GJ 9827 and were classified as “super-Earths.” The finding is presented in a paper published Sept. 6 on arXiv.org. Explore further More information: A System of Three Super Earths Transiting the Late K-Dwarf GJ 9827 at Thirty Parsecs, arXiv:1709.01957 [astro-ph.EP] arxiv.org/abs/1709.01957AbstractWe report the discovery of three small transiting planets orbiting GJ 9827, a bright (K = 7.2) nearby late K-type dwarf star. GJ 9827 hosts a 1.64+0.22−0.20 R⊕ super Earth on a 1.2 day period, a 1.29+0.17−0.16 R⊕ super Earth on a 3.6 day period, and a 2.08+0.28−0.26 R⊕ super Earth on a 6.2 day period. The radii of the planets transiting GJ 9827 span the transition between predominantly rocky and gaseous planets, and GJ 9827 b and c fall in or close to the known gap in the radius distribution of small planets between these populations. At a distance of ∼30 parsecs, GJ 9827 is the closest exoplanet host discovered by K2 to date, making these planets well-suited for atmospheric studies with the upcoming James Webb Space Telescope. The GJ 9827 system provides a valuable opportunity to characterize interior structure and atmospheric properties of coeval planets spanning the rocky to gaseous transition. © 2017 Phys.org Astronomers discover two ‘warm Jupiter’ exoplanets orbiting distant starslast_img read more

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Researchers study the opaque accretion disk of Beta Lyrae A

first_imgPhase coverage of spectro-interferometric observations of β Lyr acquired by different instruments. δ denotes the relative declination (positive toward the north), and α the relative right ascension (positive toward the east). The black line shows the size and orientation of the β Lyr orbit in the sky, the blue dots show orbital phases corresponding to NPOI observations, the magenta dots to CHARA/VEGA observations, the green dots to CHARA/MIRC observations acquired in 2013, and the red dots to CHARA/MIRC observations acquired in 2006/2007. An arbitrary vertical shift of 0.2 mas is added to separate the various orbits. Credit: Mourard et al., 2018. Located some 1,000 light years away from the Earth, Beta Lyrae is a multiple star system consisting of at least one star in close orbit to another star or two or more stars orbiting a central point. One of its components, Beta Lyrae A, is a bright binary of spectral type B. It has an effective temperature of 13,300 K and a steadily increasing orbital period of 12.94 days. The binary is currently in a phase of rapid mass exchange with the mass-losing component (donor) being the less massive (about 2.9 solar masses) than its companion (about 13.3 solar masses).Given that the donor has transferred most of its mass over to its companion, the secondary star is now more massive and exhibits an accretion disk created from this mass transfer. However, the disk blocks the view of the companion, making it difficult for observers to unveil the detailed properties of this star.Studying Beta Lyrae A, including its disk, could therefore be essential for astronomers to better understand mass exchange in close binaries. Thus, a group of astronomers led by Denis Mourard of the University of Côte d’Azur in France, has performed an analysis of the available data obtained during visible and infrared spectro-interferometric observations of Beta Lyrae A.”A series of continuum visible and NIR spectro-interferometric observations by the NPOI, CHARA/MIRC and VEGA instruments covering the whole orbit of β Lyr A acquired during a two-week campaign in 2013 were complemented with UBVR photometric observations acquired during a three-year monitoring of the system. We included NUV and FUV observations from OAO A-2, IUE, and Voyager satellites,” the researchers wrote in the paper.Based on the observational data, Mourard’s team tested various models of the disk. They found that the opaque parts of the accretion disk have the outer radius of about 30 solar radii, the semithickness of approximately 6.5 solar radii (for “slab” and “wedge” shape models), or equivalently the scale-height multiplication factor of 4.3 (for “nebula” model). Moreover, the researchers estimate that the minimum mass of the disk should be between 0.0001 and 0.001 solar masses. When it comes to the parameters of the Beta Lyrae A system, they found that its orbital inclination is 93.5 degrees. They also measured the probable distance to the binary – about 1,042 light years.In concluding remarks, the researchers revealed that they plan to publish further analyses of the Beta Lyrae A binary, focused mainly on the optically thin circumstellar medium in the system. “Using a series of spectroscopic and spectro-interferometric observations of strong emission lines we intend to resolve and describe the structure and kinematics of the optically thin medium within this remarkable system. Consequently, it should be possible to better determine the radial profiles of the disk atmosphere,” the authors of the paper noted. An international team of astronomers has conducted a study of the opaque accretion disk of the multiple star system known as Beta Lyrae A (β Lyr A for short). The research reveals important insights into nature of this disk and also discloses some parameters of the system. The study was presented in a paper published July 12 on arXiv.org. © 2018 Phys.org Journal information: Astronomy & Astrophysics Astronomers detect a doubly eclipsing quadruple star systemlast_img read more

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