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dc.contributor.authorOsborn, H. P.
dc.contributor.authorSanterne, A.
dc.contributor.authorBarros, S. C. C.
dc.contributor.authorSantos, N. C.
dc.contributor.authorDumusque, X.
dc.contributor.authorMalavolta, L.
dc.contributor.authorArmstrong, D. J.
dc.contributor.authorHojjatpanah, S.
dc.contributor.authorDemangeon, O.
dc.contributor.authorAdibekyan, V.
dc.contributor.authorAlmenara, J.-M.
dc.contributor.authorBarrado, D.
dc.contributor.authorBayliss, D.
dc.contributor.authorBoisse, I.
dc.contributor.authorBouchy, F.
dc.contributor.authorBrown, D. J. A.
dc.contributor.authorCameron, A. C.
dc.contributor.authorCharbonneau, D.
dc.contributor.authorDeleuil, M.
dc.contributor.authorDelgado Mena, E.
dc.contributor.authorDíaz, R. F.
dc.contributor.authorHébrard, G.
dc.contributor.authorKirk, J.
dc.contributor.authorKing, G.W.
dc.contributor.authorLam, K. W. F.
dc.contributor.authorLatham, D.
dc.contributor.authorLillo-Box, J.
dc.contributor.authorLouden, T. M.
dc.contributor.authorLovis, C.
dc.contributor.authorMarmier, M.
dc.contributor.authorMcCormac, J.
dc.contributor.authorMolinari, E.
dc.contributor.authorPepe, F.
dc.contributor.authorPollacco, D.
dc.contributor.authorSousa, S. G.
dc.contributor.authorUdry, S.
dc.contributor.authorWalker, S. R.
dc.date.accessioned2017-08-07T16:30:12Z
dc.date.available2017-08-07T16:30:12Z
dc.date.issued2017-08
dc.identifier250675298
dc.identifier9358d024-863a-41a2-97ce-b0aeffe15d15
dc.identifier85026470515
dc.identifier000408480100007
dc.identifier.citationOsborn , 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/10.1051/0004-6361/201628932en
dc.identifier.issn0004-6361
dc.identifier.otherBibCode: 2017A&A...604A..19O
dc.identifier.otherORCID: /0000-0002-8863-7828/work/58531487
dc.identifier.urihttps://hdl.handle.net/10023/11398
dc.description.abstractWe 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.extent8
dc.format.extent890882
dc.language.isoeng
dc.relation.ispartofAstronomy & Astrophysicsen
dc.subjectPlanets and satellitesen
dc.subjectDetectionen
dc.subjectQB Astronomyen
dc.subjectQC Physicsen
dc.subjectNDASen
dc.subject.lccQBen
dc.subject.lccQCen
dc.titleK2-110 b: a massive mini-Neptune exoplaneten
dc.typeJournal articleen
dc.contributor.sponsorScience & Technology Facilities Councilen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.contributor.institutionUniversity of St Andrews. St Andrews Centre for Exoplanet Scienceen
dc.identifier.doi10.1051/0004-6361/201628932
dc.description.statusPeer revieweden
dc.identifier.urlhttps://arxiv.org/abs/1605.04291v3en
dc.identifier.urlhttp://adsabs.harvard.edu/abs/2017A%26A...604A..19Oen
dc.identifier.grantnumberST/M001296/1en


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