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The Kepler-454 system : A small, not-rocky inner planet, a Jovian world, and a distant companion
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dc.contributor.author | Gettel, Sara | |
dc.contributor.author | Charbonneau, David | |
dc.contributor.author | Dressing, Courtney D. | |
dc.contributor.author | Buchhave, Lars A. | |
dc.contributor.author | Dumusque, Xavier | |
dc.contributor.author | Vanderburg, Andrew | |
dc.contributor.author | Bonomo, Aldo S. | |
dc.contributor.author | Malavolta, Luca | |
dc.contributor.author | Pepe, Francesco | |
dc.contributor.author | Cameron, Andrew Collier | |
dc.contributor.author | Latham, David W. | |
dc.contributor.author | Udry, Stephane | |
dc.contributor.author | Marcy, Geoffrey W. | |
dc.contributor.author | Isaacson, Howard | |
dc.contributor.author | Howard, Andrew W. | |
dc.contributor.author | Davies, Guy R. | |
dc.contributor.author | Aguirre, Victor Silva | |
dc.contributor.author | Kjeldsen, Hans | |
dc.contributor.author | Bedding, Timothy R. | |
dc.contributor.author | Lopez, Eric | |
dc.contributor.author | Affer, Laura | |
dc.contributor.author | Cosentino, Rosario | |
dc.contributor.author | Figueira, Pedro | |
dc.contributor.author | Fiorenzano, Aldo F. M. | |
dc.contributor.author | Harutyunyan, Avet | |
dc.contributor.author | Johnson, John Asher | |
dc.contributor.author | Lopez-Morales, Mercedes | |
dc.contributor.author | Lovis, Christophe | |
dc.contributor.author | Mayor, Michel | |
dc.contributor.author | Micela, Giusi | |
dc.contributor.author | Molinari, Emilio | |
dc.contributor.author | Motalebi, Fatemeh | |
dc.contributor.author | Phillips, David F. | |
dc.contributor.author | Piotto, Giampaolo | |
dc.contributor.author | Queloz, Didier | |
dc.contributor.author | Rice, Ken | |
dc.contributor.author | Sasselov, Dimitar | |
dc.contributor.author | Segransan, Damien | |
dc.contributor.author | Sozzetti, Alessandro | |
dc.contributor.author | Watson, Chris | |
dc.contributor.author | Basu, Sarbani | |
dc.contributor.author | Campante, Tiago L. | |
dc.contributor.author | Christensen-Dalsgaard, Jorgen | |
dc.contributor.author | Kawaler, Steven D. | |
dc.contributor.author | Metcalfe, Travis S. | |
dc.contributor.author | Handberg, Rasmus | |
dc.contributor.author | Lund, Mikkel N. | |
dc.contributor.author | Lundkvist, Mia S. | |
dc.contributor.author | Huber, Daniel | |
dc.contributor.author | Chaplin, William J. | |
dc.date.accessioned | 2016-01-30T00:12:00Z | |
dc.date.available | 2016-01-30T00:12:00Z | |
dc.date.issued | 2016-01-14 | |
dc.identifier | 240605984 | |
dc.identifier | c32a828b-6b08-4029-a6b6-654d0b59c61d | |
dc.identifier | 84954537907 | |
dc.identifier | 000368238500047 | |
dc.identifier.citation | Gettel , S , Charbonneau , D , Dressing , C D , Buchhave , L A , Dumusque , X , Vanderburg , A , Bonomo , A S , Malavolta , L , Pepe , F , Cameron , A C , Latham , D W , Udry , S , Marcy , G W , Isaacson , H , Howard , A W , Davies , G R , Aguirre , V S , Kjeldsen , H , Bedding , T R , Lopez , E , Affer , L , Cosentino , R , Figueira , P , Fiorenzano , A F M , Harutyunyan , A , Johnson , J A , Lopez-Morales , M , Lovis , C , Mayor , M , Micela , G , Molinari , E , Motalebi , F , Phillips , D F , Piotto , G , Queloz , D , Rice , K , Sasselov , D , Segransan , D , Sozzetti , A , Watson , C , Basu , S , Campante , T L , Christensen-Dalsgaard , J , Kawaler , S D , Metcalfe , T S , Handberg , R , Lund , M N , Lundkvist , M S , Huber , D & Chaplin , W J 2016 , ' The Kepler-454 system : A small, not-rocky inner planet, a Jovian world, and a distant companion ' , Astrophysical Journal , vol. 816 , no. 2 , 95 . https://doi.org/10.3847/0004-637X/816/2/95 | en |
dc.identifier.issn | 0004-637X | |
dc.identifier.other | ArXiv: http://arxiv.org/abs/1511.09097v1 | |
dc.identifier.other | ORCID: /0000-0002-8863-7828/work/58531521 | |
dc.identifier.uri | https://hdl.handle.net/10023/8100 | |
dc.description.abstract | Kepler-454 (KOI-273) is a relatively bright (V = 11.69 mag), Sun-like starthat hosts a transiting planet candidate in a 10.6 d orbit. From spectroscopy, we estimate the stellar temperature to be 5687 +/- 50 K, its metallicity to be [m/H] = 0.32 +/- 0.08, and the projected rotational velocity to be v sin i <2.4 km s-1. We combine these values with a study of the asteroseismic frequencies from short cadence Kepler data to estimate the stellar mass to be 1.028+0:04-0:03 M_Sun, the radius to be 1.066 +/- 0.012 R_Sun and the age to be 5.25+1:41-1:39 Gyr. We estimate the radius of the 10.6 d planet as 2.37 +/- 0.13 R_Earth. Using 63 radial velocity observations obtained with the HARPS-N spectrograph on the Telescopio Nazionale Galileo and 36 observations made with the HIRES spectrograph at Keck Observatory, we measure the mass of this planet to be 6.8 +/- 1.4M_Earth. We also detect two additional non-transiting companions, a planet with a minimum mass of 4.46 +/- 0.12 M_J in a nearly circular 524 d orbit and a massive companion with a period >10 years and mass >12.1M_J . The twelve exoplanets with radii <2.7 R_Earth and precise mass measurements appear to fall into two populations, with those <1.6 R_Earth following an Earth-like composition curve and larger planets requiring a significant fraction of volatiles. With a density of 2.76 +/- 0.73 g cm-3, Kepler-454b lies near the mass transition between these two populations and requires the presence of volatiles and/or H/He gas. | |
dc.format.extent | 2377014 | |
dc.language.iso | eng | |
dc.relation.ispartof | Astrophysical Journal | en |
dc.subject | astro-ph.EP | en |
dc.subject | astro-ph.SR | en |
dc.subject | Planetary systems | en |
dc.subject | Planets and satellites | en |
dc.subject | Composition | en |
dc.subject | Stars: individual (KOI-273 & KIC 3102384) | en |
dc.subject | Asteroseismology | en |
dc.subject | Techniques: radial velocities | en |
dc.subject | QB Astronomy | en |
dc.subject | DAS | en |
dc.subject.lcc | QB | en |
dc.title | The Kepler-454 system : A small, not-rocky inner planet, a Jovian world, and a distant companion | en |
dc.type | Journal article | en |
dc.contributor.sponsor | European Commission | en |
dc.contributor.sponsor | Science & Technology Facilities Council | en |
dc.contributor.sponsor | Science & Technology Facilities Council | en |
dc.contributor.sponsor | PPARC - Now STFC | en |
dc.contributor.sponsor | Science & Technology Facilities Council | en |
dc.contributor.sponsor | Science & Technology Facilities Council | en |
dc.contributor.sponsor | Science & Technology Facilities Council | en |
dc.contributor.institution | University of St Andrews. School of Physics and Astronomy | en |
dc.identifier.doi | 10.3847/0004-637X/816/2/95 | |
dc.description.status | Peer reviewed | en |
dc.identifier.grantnumber | en | |
dc.identifier.grantnumber | ST/M001296/1 | en |
dc.identifier.grantnumber | ST/I000666/1 | en |
dc.identifier.grantnumber | PP/D000890/1 | en |
dc.identifier.grantnumber | ST/J001651/1 | en |
dc.identifier.grantnumber | ST/G001006/1 | en |
dc.identifier.grantnumber | PP/F000065/1 | en |
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