J/other/Sci/382.ivo://CDS.VizieR/J/other/Sci/382.1031CDSStefansson G.Mahadevan S.Miguel Y.Robertson P.Delamer M.,Kanodia S.Canas C.I.Winn J.N.Ninan J.P.Terrien R.C.Holcomb R.,Ford E.B.Zawadzki B.Bowler B.P.Bender C.F.Cochran W.D.Diddams S.,Endl M.Fredrick C.Halverson S.Hearty F.Hill G.J.Lin A.S.J.,Metcalf A.J.Monson A.Ramsey L.Roy A.Schwab C.Wright J.T.,Zeimann G.2024-10-02T06:48:29Z2024-07-25T13:52:39ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frmultiple-starsexoplanetsradial-velocityinfrared-astronomyTheories of planet formation predict that low-mass stars should rarely host exoplanets with masses exceeding that of Neptune. We used radial velocity observations to detect a Neptune-mass exoplanet orbiting LHS 3154, a star that is nine times less massive than the Sun. The exoplanet's orbital period is 3.7 days, and its minimum mass is 13.2 Earth masses. We used simulations to show that the high planet-to-star mass ratio (>3.5x10^-46) is not an expected outcome of either the core accretion or gravitational instability theories of planet formation. In the core-accretion simulations, we show that close-in Neptune-mass planets are only formed if the dust mass of the protoplanetary disk is an order of magnitude greater than typically observed around very low-mass stars.2023Sci...382.1031Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/other/Sci/382.1031CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/other/Sci/382.1031https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/other/Sci/382.1031http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/other/Sci/382.1031https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/other/Sci/382.1031https://vizier.iucaa.in/viz-bin/votable?-source=J/other/Sci/382.1031http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/other/Sci/382.1031GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapInfrareddefaultJ/other/Sci/382.1031/tables1Radial Velocities from the Habitable-zone Planet Finder for LHS 3154recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric Julian datedtime.epochdoubleRVRadial velocitym/sphys.veloc;pos.heliocentricfloate_RVRadial velocity errorm/sstat.errorfloatJ/other/Sci/382.1031/tables2Activity indicators from the Habitable-zone Planet Finder for LHS 3154recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric Julian datedtime.epochdoubledLWDifferential Line Width Indexm**2.s**-2spect.indexfloate_dLWDifferential Line Width Index errorm**2.s**-2stat.errorfloatCRXChromatic Activity Indexm/sspect.indexfloate_CRXChromatic Activity Index errorm/sstat.errorfloatIRT1? CaII Infrared Triplet Index 1spect.indexfloatnullablee_IRT1? CaII Infrared Triplet Index 1 errorstat.errorfloatnullableIRT2CaII Infrared Triplet Index 2spect.indexfloate_IRT2CaII Infrared Triplet Index 2 errorstat.errorfloatIRT3CaII Infrared Triplet Index 3spect.indexfloate_IRT3CaII Infrared Triplet Index 3 errorstat.errorfloat