TY - JOUR
T1 - TOI-5375 B
T2 - A Very Low Mass Star at the Hydrogen-burning Limit Orbiting an Early M-type Star
AU - Lambert, Mika
AU - Bender, Chad F.
AU - Kanodia, Shubham
AU - Cañas, Caleb I.
AU - Monson, Andrew
AU - Stefánsson, Gudmundur
AU - Cochran, William D.
AU - Everett, Mark E.
AU - Gupta, Arvind F.
AU - Hearty, Fred
AU - Kobulnicky, Henry A.
AU - Libby-Roberts, Jessica E.
AU - Lin, Andrea S.J.
AU - Mahadevan, Suvrath
AU - Ninan, Joe P.
AU - Parker, Brock A.
AU - Robertson, Paul
AU - Schwab, Christian
AU - Terrien, Ryan C.
N1 - Publisher Copyright:
© 2023. The Author(s). Published by the American Astronomical Society.
PY - 2023/5/1
Y1 - 2023/5/1
N2 - The Transiting Exoplanet Survey Satellite (TESS) mission detected a companion orbiting TIC 71268730, categorized it as a planet candidate, and designated the system TOI-5375. Our follow-up analysis using radial-velocity data from the Habitable-zone Planet Finder, photometric data from Red Buttes Observatory, and speckle imaging with NN-EXPLORE Exoplanet Stellar Speckle Imager determined that the companion is a very low mass star near the hydrogen-burning mass limit with a mass of 0.080 ± 0.002M ⊙ (83.81 ± 2.10M J ), a radius of 0.1114-0.0050+0.0048R⊙ (1.0841 0.04870.0467RJ ), and brightness temperature of 2600 ± 70 K. This object orbits with a period of 1.721553 ± 0.000001 days around an early M dwarf star (0.62 ± 0.016M ⊙). TESS photometry shows regular variations in the host star's TESS light curve, which we interpreted as an activity-induced variation of ∼2%, and used this variability to measure the host star's stellar rotation period of 1.9716-0.0083+0.0080 days. The TOI-5375 system provides tight constraints on stellar models of low-mass stars at the hydrogen-burning limit and adds to the population in this important region.
AB - The Transiting Exoplanet Survey Satellite (TESS) mission detected a companion orbiting TIC 71268730, categorized it as a planet candidate, and designated the system TOI-5375. Our follow-up analysis using radial-velocity data from the Habitable-zone Planet Finder, photometric data from Red Buttes Observatory, and speckle imaging with NN-EXPLORE Exoplanet Stellar Speckle Imager determined that the companion is a very low mass star near the hydrogen-burning mass limit with a mass of 0.080 ± 0.002M ⊙ (83.81 ± 2.10M J ), a radius of 0.1114-0.0050+0.0048R⊙ (1.0841 0.04870.0467RJ ), and brightness temperature of 2600 ± 70 K. This object orbits with a period of 1.721553 ± 0.000001 days around an early M dwarf star (0.62 ± 0.016M ⊙). TESS photometry shows regular variations in the host star's TESS light curve, which we interpreted as an activity-induced variation of ∼2%, and used this variability to measure the host star's stellar rotation period of 1.9716-0.0083+0.0080 days. The TOI-5375 system provides tight constraints on stellar models of low-mass stars at the hydrogen-burning limit and adds to the population in this important region.
UR - http://www.scopus.com/inward/record.url?scp=85159608289&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85159608289&partnerID=8YFLogxK
U2 - 10.3847/1538-3881/acc651
DO - 10.3847/1538-3881/acc651
M3 - Article
AN - SCOPUS:85159608289
SN - 0004-6256
VL - 165
JO - Astronomical Journal
JF - Astronomical Journal
IS - 5
M1 - 218
ER -