The TESS-Keck Survey. XXII. A Sub-Neptune Orbiting TOI-1437
Author:
Pidhorodetska DariaORCID, Gilbert Emily A.ORCID, Kane Stephen R.ORCID, Barclay ThomasORCID, Polanski Alex S.ORCID, Hill Michelle L.ORCID, Stassun Keivan G.ORCID, Giacalone StevenORCID, Ciardi David R.ORCID, Boyle Andrew W.ORCID, Howell Steve B.ORCID, Lillo-Box JorgeORCID, MacDougall Mason G.ORCID, Fetherolf TaraORCID, Batalha Natalie M.ORCID, Crossfield Ian J. M., Dressing CourtneyORCID, Fulton BenjaminORCID, Howard Andrew W.ORCID, Huber DanielORCID, Isaacson HowardORCID, Petigura Erik A.ORCID, Robertson PaulORCID, Weiss Lauren M.ORCID, Angelo IsabelORCID, Beard CoreyORCID, Behmard AidaORCID, Blunt SarahORCID, Brinkman Casey L.ORCID, Chontos AshleyORCID, Dai FeiORCID, Dalba Paul A.ORCID, Holcomb RaeORCID, Lubin JackORCID, Mayo Andrew W.ORCID, Murphy Joseph M. AkanaORCID, Rice MalenaORCID, Rubenzahl RyanORCID, Scarsdale NicholasORCID, Turtelboom Emma V.ORCID, Tyler DakotahORCID, Van Zandt JudahORCID, Schwieterman Edward W.ORCID
Abstract
Abstract
Exoplanet discoveries have revealed a dramatic diversity of planet sizes across a vast array of orbital architectures. Sub-Neptunes are of particular interest; due to their absence in our own solar system, we rely on demographics of exoplanets to better understand their bulk composition and formation scenarios. Here, we present the discovery and characterization of TOI-1437 b, a sub-Neptune with a 18.84 day orbit around a near-solar analog (M
⋆ = 1.10 ± 0.10 M
☉, R
⋆=1.17 ± 0.12 R
☉). The planet was detected using photometric data from the Transiting Exoplanet Survey Satellite (TESS) mission and radial velocity (RV) follow-up observations were carried out as a part of the TESS-Keck Survey using both the HIRES instrument at Keck Observatory and the Levy Spectrograph on the Automated Planet Finder telescope. A combined analysis of these data reveal a planet radius of R
p
= 2.24 ± 0.23 R
⊕ and a mass measurement of M
p
= 9.6 ± 3.9 M
⊕). TOI-1437 b is one of few (∼50) known transiting sub-Neptunes orbiting a solar-mass star that has a RV mass measurement. As the formation pathway of these worlds remains an unanswered question, the precise mass characterization of TOI-1437 b may provide further insight into this class of planet.
Funder
NASA ∣ SMD ∣ Planetary Science Division Department of Education and Training ∣ Australian Research Council Instituo Cajal Ministerio de Ciencia e Innovación NSF ∣ National Science Foundation Graduate Research Fellowship Program NASA ∣ Jet Propulsion Laboratory
Publisher
American Astronomical Society
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