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EPIC 201702477b : a transiting brown dwarf from K2 in a 41 day orbit
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dc.contributor.author | Bayliss, D. | |
dc.contributor.author | Hojjatpanah, S. | |
dc.contributor.author | Santerne, A. | |
dc.contributor.author | Dragomir, D. | |
dc.contributor.author | Zhou, G. | |
dc.contributor.author | Shporer, A. | |
dc.contributor.author | Colón, K. D. | |
dc.contributor.author | Almenara, J. | |
dc.contributor.author | Armstrong, D. J. | |
dc.contributor.author | Barrado, D. | |
dc.contributor.author | Barros, S. C. C. | |
dc.contributor.author | Bento, J. | |
dc.contributor.author | Boisse, I. | |
dc.contributor.author | Bouchy, F. | |
dc.contributor.author | Brown, D. J. A. | |
dc.contributor.author | Brown, T. | |
dc.contributor.author | Cameron, A. | |
dc.contributor.author | Cochran, W. D. | |
dc.contributor.author | Demangeon, O. | |
dc.contributor.author | Deleuil, M. | |
dc.contributor.author | Díaz, R. F. | |
dc.contributor.author | Fulton, B. | |
dc.contributor.author | Horne, K. | |
dc.contributor.author | Hébrard, G. | |
dc.contributor.author | Lillo-Box, J. | |
dc.contributor.author | Lovis, C. | |
dc.contributor.author | Mawet, D. | |
dc.contributor.author | Ngo, H. | |
dc.contributor.author | Osborn, H. | |
dc.contributor.author | Palle, E. | |
dc.contributor.author | Petigura, E. | |
dc.contributor.author | Pollacco, D. | |
dc.contributor.author | Santos, N. | |
dc.contributor.author | Sefako, R. | |
dc.contributor.author | Siverd, R. | |
dc.contributor.author | Sousa, S. G. | |
dc.contributor.author | Tsantaki, M. | |
dc.date.accessioned | 2017-01-30T16:30:10Z | |
dc.date.available | 2017-01-30T16:30:10Z | |
dc.date.issued | 2016-12-20 | |
dc.identifier | 249016334 | |
dc.identifier | e123a72d-11bb-4032-802c-e36e0671fc4a | |
dc.identifier | 85009089827 | |
dc.identifier | 000391682800004 | |
dc.identifier.citation | Bayliss , D , Hojjatpanah , S , Santerne , A , Dragomir , D , Zhou , G , Shporer , A , Colón , K D , Almenara , J , Armstrong , D J , Barrado , D , Barros , S C C , Bento , J , Boisse , I , Bouchy , F , Brown , D J A , Brown , T , Cameron , A , Cochran , W D , Demangeon , O , Deleuil , M , Díaz , R F , Fulton , B , Horne , K , Hébrard , G , Lillo-Box , J , Lovis , C , Mawet , D , Ngo , H , Osborn , H , Palle , E , Petigura , E , Pollacco , D , Santos , N , Sefako , R , Siverd , R , Sousa , S G & Tsantaki , M 2016 , ' EPIC 201702477b : a transiting brown dwarf from K2 in a 41 day orbit ' , Astronomical Journal , vol. 153 , no. 1 , 15 . https://doi.org/10.3847/1538-3881/153/1/15 | en |
dc.identifier.issn | 0004-6256 | |
dc.identifier.other | ORCID: /0000-0002-8863-7828/work/58531455 | |
dc.identifier.uri | https://hdl.handle.net/10023/10203 | |
dc.description.abstract | We report the discovery of EPIC 201702477b, a transiting brown dwarf in a long period (40.73691 ± 0.00037 day) and eccentric (e = 0.2281 ± 0.0026) orbit. This system was initially reported as a planetary candidate based on two transit events seen in K2 Campaign 1 photometry and later validated as an exoplanet candidate. We confirm the transit and refine the ephemeris with two subsequent ground-based detections of the transit using the Las Cumbres Observatory Global Telescope 1 m telescope network. We rule out any transit timing variations above the level of ∼30 s. Using high precision radial velocity measurements from HARPS and SOPHIE we identify the transiting companion as a brown dwarf with a mass, radius, and bulk density of 66.9 ± 1.7 MJ, 0.757 ± 0.065 RJ, and 191 ± 51 g cm-3 respectively. EPIC 201702477b is the smallest radius brown dwarf yet discovered, with a mass just below the H-burning limit. It has the highest density of any planet, substellar mass object, or main-sequence star discovered so far. We find evidence in the set of known transiting brown dwarfs for two populations of objects - high mass brown dwarfs and low mass brown dwarfs. The higher-mass population have radii in very close agreement to theoretical models, and show a lower-mass limit around 60 MJ. This may be the signature of mass-dependent ejection of systems during the formation process. | |
dc.format.extent | 10 | |
dc.format.extent | 701481 | |
dc.language.iso | eng | |
dc.relation.ispartof | Astronomical Journal | en |
dc.subject | Planetary systems | en |
dc.subject | Techniques: photometric | en |
dc.subject | Techniques: spectroscopic | en |
dc.subject | QB Astronomy | en |
dc.subject | QC Physics | en |
dc.subject | Astronomy and Astrophysics | en |
dc.subject | Space and Planetary Science | en |
dc.subject | 3rd-DAS | en |
dc.subject.lcc | QB | en |
dc.subject.lcc | QC | en |
dc.title | EPIC 201702477b : a transiting brown dwarf from K2 in a 41 day orbit | en |
dc.type | Journal article | en |
dc.contributor.sponsor | European Commission | en |
dc.contributor.sponsor | Science & Technology Facilities Council | en |
dc.contributor.institution | University of St Andrews. School of Physics and Astronomy | en |
dc.contributor.institution | University of St Andrews. St Andrews Centre for Exoplanet Science | en |
dc.identifier.doi | 10.3847/1538-3881/153/1/15 | |
dc.description.status | Peer reviewed | en |
dc.identifier.url | https://arxiv.org/abs/1606.04047 | en |
dc.identifier.grantnumber | en | |
dc.identifier.grantnumber | ST/M001296/1 | en |
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