V391 Pegasi b, also known as HS 2201+2610 b, is an extrasolar planet candidate orbiting the starV391 Pegasi approximately 4,570 light-years away in the constellation of Pegasus. The candidate planet was discovered by means of variable star timing, which measured anomalies in variability of the star caused by a planet. It is the first planet candidate to claim to be detected with this method. The discovery reported the planet candidate to have mass of 3.2 times Jupiter's (assuming an edge-on orbit), semi-major axis of 1.7 AU, and orbital period of 1,170 days.
The planet candidate was discovered in March 2007 and published in September 2007. If it is confirmed, its survival would indicate that planets at Earth-like distances can survive their star's red-giant phase, though this is a much larger planet than Earth (about the same size as Jupiter and Saturn).[1] Its existence has been called into question with further monitoring of the pulsations of the star which show deviations from the predicted behavior if this were in fact a planet. The variations in the pulsations may be due to unknown stellar variability.[2]
References
R. Silvotti; S. Schuh; R. Janulis; S. Bernabei; R. Ostensen; J.-E. Solheim; I. Bruni; R. Gualandi; T. Oswalt; A. Bonanno; B. Mignemi; the Whole Earth Telescope Xcov23 collaboration (2007). "The O-C diagram of the subdwarf B pulsating star HS2201+2610: detection of a giant planet?". ASP Conference Series. 372: 369. arXiv:astro-ph/0703753. Bibcode:2007ASPC..372..369S.
R. Silvotti; S. Schuh; R. Janulis; J.-E. Solheim; S. Bernabei; R. Østensen; T. D. Oswalt; I. Bruni; R. Gualandi; A. Bonanno; G. Vauclair; M. Reed; C.-W. Chen; E. Leibowitz; M. Paparo; A. Baran; S. Charpinet; N. Dolez; S. Kawaler; D. Kurtz; P. Moskalik; R. Riddle & S. Zola (2007). "A giant planet orbiting the 'extreme horizontal branch' star V 391 Pegasi" (PDF). Nature. 449 (7159): 189–191. Bibcode:2007Natur.449..189S. doi:10.1038/nature06143. PMID 17851517. S2CID 4342338.
^Planet discovered that offers clues to Earth's future
^Silvotti, R.; Schuh, S.; Kim, S.-L.; Lutz, R.; Reed, M.; Benatti, S.; Janulis, R.; Lanteri, L.; Østensen, R. (2018-03-01). "The sdB pulsating star V391 Peg and its putative giant planet revisited after 13 years of time-series photometric data". Astronomy & Astrophysics. 611: A85. arXiv:1711.10942. Bibcode:2018A&A...611A..85S. doi:10.1051/0004-6361/201731473. ISSN 0004-6361. S2CID 119492634.
External links
The Extrasolar Planets Encyclopaedia: Notes for planet V391 Pegasi b
This extrasolar-planet-related article is a stub. You can help Wikipedia by expanding it.
v391, pegasi, also, known, 2201, 2610, extrasolar, planet, candidate, orbiting, star, v391, pegasi, approximately, light, years, away, constellation, pegasus, candidate, planet, discovered, means, variable, star, timing, which, measured, anomalies, variability. V391 Pegasi b also known as HS 2201 2610 b is an extrasolar planet candidate orbiting the star V391 Pegasi approximately 4 570 light years away in the constellation of Pegasus The candidate planet was discovered by means of variable star timing which measured anomalies in variability of the star caused by a planet It is the first planet candidate to claim to be detected with this method The discovery reported the planet candidate to have mass of 3 2 times Jupiter s assuming an edge on orbit semi major axis of 1 7 AU and orbital period of 1 170 days V391 Pegasi bDiscoveryDiscovered bySilvotti et al Discovery siteNaples ItalyDiscovery dateMarch 2007Detection methodVariable star timingOrbital characteristicsSemi major axis1 7 0 1 AU 254 000 000 15 000 000 km Eccentricity0Orbital period sidereal 1 170 44 dTime of periastron2 452 418 96Argument of periastron23 5 7 0Semi amplitude76 7StarV391 PegasiPhysical characteristicsMass gt 3 2 0 7 MJThe planet candidate was discovered in March 2007 and published in September 2007 If it is confirmed its survival would indicate that planets at Earth like distances can survive their star s red giant phase though this is a much larger planet than Earth about the same size as Jupiter and Saturn 1 Its existence has been called into question with further monitoring of the pulsations of the star which show deviations from the predicted behavior if this were in fact a planet The variations in the pulsations may be due to unknown stellar variability 2 References EditR Silvotti S Schuh R Janulis S Bernabei R Ostensen J E Solheim I Bruni R Gualandi T Oswalt A Bonanno B Mignemi the Whole Earth Telescope Xcov23 collaboration 2007 The O C diagram of the subdwarf B pulsating star HS2201 2610 detection of a giant planet ASP Conference Series 372 369 arXiv astro ph 0703753 Bibcode 2007ASPC 372 369S R Silvotti S Schuh R Janulis J E Solheim S Bernabei R Ostensen T D Oswalt I Bruni R Gualandi A Bonanno G Vauclair M Reed C W Chen E Leibowitz M Paparo A Baran S Charpinet N Dolez S Kawaler D Kurtz P Moskalik R Riddle amp S Zola 2007 A giant planet orbiting the extreme horizontal branch star V 391 Pegasi PDF Nature 449 7159 189 191 Bibcode 2007Natur 449 189S doi 10 1038 nature06143 PMID 17851517 S2CID 4342338 Planet discovered that offers clues to Earth s future Silvotti R Schuh S Kim S L Lutz R Reed M Benatti S Janulis R Lanteri L Ostensen R 2018 03 01 The sdB pulsating star V391 Peg and its putative giant planet revisited after 13 years of time series photometric data Astronomy amp Astrophysics 611 A85 arXiv 1711 10942 Bibcode 2018A amp A 611A 85S doi 10 1051 0004 6361 201731473 ISSN 0004 6361 S2CID 119492634 External links EditThe Extrasolar Planets Encyclopaedia Notes for planet V391 Pegasi b This extrasolar planet related article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title V391 Pegasi b amp oldid 1141445738, wikipedia, wiki, book, books, library,
