Files in this item
K2-110 b: a massive mini-Neptune exoplanet
Item metadata
dc.contributor.author | Osborn, H. P. | |
dc.contributor.author | Santerne, A. | |
dc.contributor.author | Barros, S. C. C. | |
dc.contributor.author | Santos, N. C. | |
dc.contributor.author | Dumusque, X. | |
dc.contributor.author | Malavolta, L. | |
dc.contributor.author | Armstrong, D. J. | |
dc.contributor.author | Hojjatpanah, S. | |
dc.contributor.author | Demangeon, O. | |
dc.contributor.author | Adibekyan, V. | |
dc.contributor.author | Almenara, J.-M. | |
dc.contributor.author | Barrado, D. | |
dc.contributor.author | Bayliss, D. | |
dc.contributor.author | Boisse, I. | |
dc.contributor.author | Bouchy, F. | |
dc.contributor.author | Brown, D. J. A. | |
dc.contributor.author | Cameron, A. C. | |
dc.contributor.author | Charbonneau, D. | |
dc.contributor.author | Deleuil, M. | |
dc.contributor.author | Delgado Mena, E. | |
dc.contributor.author | Díaz, R. F. | |
dc.contributor.author | Hébrard, G. | |
dc.contributor.author | Kirk, J. | |
dc.contributor.author | King, G.W. | |
dc.contributor.author | Lam, K. W. F. | |
dc.contributor.author | Latham, D. | |
dc.contributor.author | Lillo-Box, J. | |
dc.contributor.author | Louden, T. M. | |
dc.contributor.author | Lovis, C. | |
dc.contributor.author | Marmier, M. | |
dc.contributor.author | McCormac, J. | |
dc.contributor.author | Molinari, E. | |
dc.contributor.author | Pepe, F. | |
dc.contributor.author | Pollacco, D. | |
dc.contributor.author | Sousa, S. G. | |
dc.contributor.author | Udry, S. | |
dc.contributor.author | Walker, S. R. | |
dc.date.accessioned | 2017-08-07T16:30:12Z | |
dc.date.available | 2017-08-07T16:30:12Z | |
dc.date.issued | 2017-08 | |
dc.identifier | 250675298 | |
dc.identifier | 9358d024-863a-41a2-97ce-b0aeffe15d15 | |
dc.identifier | 85026470515 | |
dc.identifier | 000408480100007 | |
dc.identifier.citation | Osborn , H P , Santerne , A , Barros , S C C , Santos , N C , Dumusque , X , Malavolta , L , Armstrong , D J , Hojjatpanah , S , Demangeon , O , Adibekyan , V , Almenara , J-M , Barrado , D , Bayliss , D , Boisse , I , Bouchy , F , Brown , D J A , Cameron , A C , Charbonneau , D , Deleuil , M , Delgado Mena , E , Díaz , R F , Hébrard , G , Kirk , J , King , G W , Lam , K W F , Latham , D , Lillo-Box , J , Louden , T M , Lovis , C , Marmier , M , McCormac , J , Molinari , E , Pepe , F , Pollacco , D , Sousa , S G , Udry , S & Walker , S R 2017 , ' K2-110 b: a massive mini-Neptune exoplanet ' , Astronomy & Astrophysics , vol. 604 , A19 . https://doi.org/10.1051/0004-6361/201628932 | en |
dc.identifier.issn | 0004-6361 | |
dc.identifier.other | BibCode: 2017A&A...604A..19O | |
dc.identifier.other | ORCID: /0000-0002-8863-7828/work/58531487 | |
dc.identifier.uri | https://hdl.handle.net/10023/11398 | |
dc.description.abstract | We report the discovery of the exoplanet K2-110 b (previously EPIC212521166b) from K2 photometry orbiting in a 13.8637d period around an old, metal-poor K3 dwarf star. With a V-band magnitude of 11.9,K2-110 is particularly amenable to RV follow-up. A joint analysis of K2 photometry and high-precision RVs from 28 HARPS and HARPS-N spectra reveal it to have a radius of 2.6 ± 0.1R⊕ and amass of 16.7 ± 3.2M⊕, hence a density of 5.2± 1.2 g cm-3, making it one of the most massive planets yet to be found with a sub-Neptune radius. When accounting for compression, the resulting Earth-like density is best fitted by a 0.2M⊕ hydrogen atmosphere over an 16.5M⊕ Earth-like interior, although the planet could also have significant water content. At 0.1 AU, even taking into account the old stellar age of 8 ± 3 Gyr, the planet is unlikely to have been significantly affected by EUV evaporation. However the planet likely disc-migrated to its current position making the lack of a thick H2 atmosphere puzzling. This analysis has made K2-110 b one of the best-characterised mini-Neptunes with density constrained to less than 30%. | |
dc.format.extent | 8 | |
dc.format.extent | 890882 | |
dc.language.iso | eng | |
dc.relation.ispartof | Astronomy & Astrophysics | en |
dc.subject | Planets and satellites | en |
dc.subject | Detection | en |
dc.subject | QB Astronomy | en |
dc.subject | QC Physics | en |
dc.subject | NDAS | en |
dc.subject.lcc | QB | en |
dc.subject.lcc | QC | en |
dc.title | K2-110 b: a massive mini-Neptune exoplanet | en |
dc.type | Journal article | 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 | 10.1051/0004-6361/201628932 | |
dc.description.status | Peer reviewed | en |
dc.identifier.url | https://arxiv.org/abs/1605.04291v3 | en |
dc.identifier.url | http://adsabs.harvard.edu/abs/2017A%26A...604A..19O | en |
dc.identifier.grantnumber | ST/M001296/1 | en |
This item appears in the following Collection(s)
Items in the St Andrews Research Repository are protected by copyright, with all rights reserved, unless otherwise indicated.