TOI-5375 B: A Very low mass star at the hydrogen-burning limit orbiting an early M-type star

Mika Lambert; Chad F. Bender; Shubham Kanodia; Caleb I. Cañas; Andrew Monson; Gudmundur Stefánsson; William D. Cochran; Mark E. Everett; Arvind F. Gupta; Fred Hearty; Henry A. Kobulnicky; Jessica E. Libby-Roberts; Andrea S. J. Lin; Suvrath Mahadevan; Joe P. Ninan; Brock A. Parker; Paul Robertson; Christian Schwab; Ryan C. Terrien

doi:10.3847/1538-3881/acc651

TOI-5375 B: A Very low mass star at the hydrogen-burning limit orbiting an early M-type star

Mika Lambert, Chad F. Bender, Shubham Kanodia, Caleb I. Cañas, Andrew Monson, Gudmundur Stefánsson, William D. Cochran, Mark E. Everett, Arvind F. Gupta, Fred Hearty, Henry A. Kobulnicky, Jessica E. Libby-Roberts, Andrea S. J. Lin, Suvrath Mahadevan, Joe P. Ninan, Brock A. Parker, Paul Robertson, Christian Schwab, Ryan C. Terrien

School of Mathematical and Physical Sciences

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Abstract

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_0.0487^0.0467R_J ), 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.

Original language	English
Article number	218
Pages (from-to)	1-10
Number of pages	10
Journal	Astronomical Journal
Volume	165
Issue number	5
DOIs	https://doi.org/10.3847/1538-3881/acc651
Publication status	Published - 1 May 2023

Bibliographical note

© 2023. The Author(s). Published by the American Astronomical Society. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

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Lambert, M., Bender, C. F., Kanodia, S., Cañas, C. I., Monson, A., Stefánsson, G., Cochran, W. D., Everett, M. E., Gupta, A. F., Hearty, F., Kobulnicky, H. A., Libby-Roberts, J. E., Lin, A. S. J., Mahadevan, S., Ninan, J. P., Parker, B. A., Robertson, P., Schwab, C., & Terrien, R. C. (2023). TOI-5375 B: A Very low mass star at the hydrogen-burning limit orbiting an early M-type star. Astronomical Journal, 165(5), 1-10. Article 218. https://doi.org/10.3847/1538-3881/acc651

@article{57ee563a001c45cab4e41c7314ab66ee,

title = "TOI-5375 B: A Very low mass star at the hydrogen-burning limit orbiting an early M-type star",

abstract = "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 ± 2.10MJ ), a radius of 0.1114-0.0050+0.0048R⊙ (1.08410.04870.0467RJ ), 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.",

author = "Mika Lambert and Bender, \{Chad F.\} and Shubham Kanodia and Ca{\~n}as, \{Caleb I.\} and Andrew Monson and Gudmundur Stef{\'a}nsson and Cochran, \{William D.\} and Everett, \{Mark E.\} and Gupta, \{Arvind F.\} and Fred Hearty and Kobulnicky, \{Henry A.\} and Libby-Roberts, \{Jessica E.\} and Lin, \{Andrea S. J.\} and Suvrath Mahadevan and Ninan, \{Joe P.\} and Parker, \{Brock A.\} and Paul Robertson and Christian Schwab and Terrien, \{Ryan C.\}",

note = "{\textcopyright} 2023. The Author(s). Published by the American Astronomical Society. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.",

year = "2023",

month = may,

day = "1",

doi = "10.3847/1538-3881/acc651",

language = "English",

volume = "165",

pages = "1--10",

journal = "Astronomical Journal",

issn = "0004-6256",

publisher = "American Astronomical Society",

number = "5",

}

Lambert, M, Bender, CF, Kanodia, S, Cañas, CI, Monson, A, Stefánsson, G, Cochran, WD, Everett, ME, Gupta, AF, Hearty, F, Kobulnicky, HA, Libby-Roberts, JE, Lin, ASJ, Mahadevan, S, Ninan, JP, Parker, BA, Robertson, P, Schwab, C & Terrien, RC 2023, 'TOI-5375 B: A Very low mass star at the hydrogen-burning limit orbiting an early M-type star', Astronomical Journal, vol. 165, no. 5, 218, pp. 1-10. https://doi.org/10.3847/1538-3881/acc651

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 - © 2023. The Author(s). Published by the American Astronomical Society. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

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 ± 2.10MJ ), a radius of 0.1114-0.0050+0.0048R⊙ (1.08410.04870.0467RJ ), 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 ± 2.10MJ ), a radius of 0.1114-0.0050+0.0048R⊙ (1.08410.04870.0467RJ ), 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 - https://www.scopus.com/pages/publications/85159608289

U2 - 10.3847/1538-3881/acc651

DO - 10.3847/1538-3881/acc651

M3 - Article

AN - SCOPUS:85159608289

SN - 0004-6256

VL - 165

SP - 1

EP - 10

JO - Astronomical Journal

JF - Astronomical Journal

IS - 5

M1 - 218

ER -

TOI-5375 B: A Very low mass star at the hydrogen-burning limit orbiting an early M-type star

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