LHS 3154 RV and activity indicators

Theories 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.

Identifier
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/other/Sci/382.1031
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/other/Sci/382.1031
Related Identifier http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/other/Sci/382.1031
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/other/Sci/382.1031
Provenance
Creator Stefansson 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.
Publisher CDS
Publication Year 2024
Rights https://cds.unistra.fr/vizier-org/licences_vizier.html
OpenAccess true
Contact CDS support team <cds-question(at)unistra.fr>
Representation
Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy; Exoplanet Astronomy; Natural Sciences; Observational Astronomy; Physics; Stellar Astronomy