Searching for GEMS: TOI-6383Ab, a giant planet transiting an M3-dwarf star in a binary system

Lia Marta Bernabò; Shubham Kanodia; Caleb I. Cañas; William D. Cochran; Szilárd Csizmadia; Suvrath Mahadevan; Gudhmundur Stefánsson; Arvind F. Gupta; Andrew Monson; Henry A. Kobulnicky; Alexander K. Larsen; Ethan G. Cotter; Alexina Birkholz; Tera N. Swaby; Gregory Zeimann; Chad F. Bender; Scott A. Diddams; Jessica E. Libby-Roberts; Andrea S. J. Lin; Joe P. Ninan; Heike Rauer; Varghese Reji; Paul Robertson; Arpita Roy; Christian Schwab

doi:10.3847/1538-3881/ad7fe8

Searching for GEMS: TOI-6383Ab, a giant planet transiting an M3-dwarf star in a binary system

Lia Marta Bernabò^*, Shubham Kanodia, Caleb I. Cañas, William D. Cochran, Szilárd Csizmadia, Suvrath Mahadevan, Gudhmundur Stefánsson, Arvind F. Gupta, Andrew Monson, Henry A. Kobulnicky, Alexander K. Larsen, Ethan G. Cotter, Alexina Birkholz, Tera N. Swaby, Gregory Zeimann, Chad F. Bender, Scott A. Diddams, Jessica E. Libby-Roberts, Andrea S. J. Lin, Joe P. NinanHeike Rauer, Varghese Reji, Paul Robertson, Arpita Roy, Christian Schwab

^*Corresponding author for this work

School of Mathematical and Physical Sciences

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Abstract

We report on the discovery of a transiting giant planet around the 3500 K M3-dwarf star TOI-6383A located 172 pc from Earth. It was detected by the Transiting Exoplanet Survey Satellite and confirmed by a combination of ground-based follow-up photometry and precise radial velocity measurements. This planet has an orbital period of ∼1.791 days, a mass of 1.040 ± 0.094 M_J, and a radius of 1.008_−0.033^+0.036R_J, resulting in a mean bulk density of 1.26_−0.17^+0.18 g cm⁻³. TOI-6383A has an M dwarf companion star, TOI-6383B, which has a stellar effective temperature of T_eff ∼ 3100 K and a projected orbital separation of 3126 au. TOI-6383A is a low-mass dwarf star hosting a giant planet and is an intriguing object for planetary evolution studies due to its high planet-to-star mass ratio. This discovery is part of the Searching for Giant Exoplanets around M-dwarf Stars (GEMS) Survey, intending to provide robust and accurate estimates of the occurrence of GEMS and the statistics on their physical and orbital parameters. This paper presents an interesting addition to the small number of confirmed GEMS, particularly notable since its formation necessitates massive, dust-rich protoplanetary discs and high accretion efficiency (>10%).

Original language	English
Article number	273
Pages (from-to)	1-14
Number of pages	14
Journal	Astronomical Journal
Volume	168
Issue number	6
DOIs	https://doi.org/10.3847/1538-3881/ad7fe8
Publication status	Published - 1 Dec 2024

Bibliographical note

© 2024. 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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Bernabò, L. M., Kanodia, S., Cañas, C. I., Cochran, W. D., Csizmadia, S., Mahadevan, S., Stefánsson, G., Gupta, A. F., Monson, A., Kobulnicky, H. A., Larsen, A. K., Cotter, E. G., Birkholz, A., Swaby, T. N., Zeimann, G., Bender, C. F., Diddams, S. A., Libby-Roberts, J. E., Lin, A. S. J., ... Schwab, C. (2024). Searching for GEMS: TOI-6383Ab, a giant planet transiting an M3-dwarf star in a binary system. Astronomical Journal, 168(6), 1-14. Article 273. https://doi.org/10.3847/1538-3881/ad7fe8

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title = "Searching for GEMS: TOI-6383Ab, a giant planet transiting an M3-dwarf star in a binary system",

abstract = "We report on the discovery of a transiting giant planet around the 3500 K M3-dwarf star TOI-6383A located 172 pc from Earth. It was detected by the Transiting Exoplanet Survey Satellite and confirmed by a combination of ground-based follow-up photometry and precise radial velocity measurements. This planet has an orbital period of ∼1.791 days, a mass of 1.040 ± 0.094 MJ, and a radius of 1.008−0.033+0.036RJ, resulting in a mean bulk density of 1.26−0.17+0.18 g cm−3. TOI-6383A has an M dwarf companion star, TOI-6383B, which has a stellar effective temperature of Teff ∼ 3100 K and a projected orbital separation of 3126 au. TOI-6383A is a low-mass dwarf star hosting a giant planet and is an intriguing object for planetary evolution studies due to its high planet-to-star mass ratio. This discovery is part of the Searching for Giant Exoplanets around M-dwarf Stars (GEMS) Survey, intending to provide robust and accurate estimates of the occurrence of GEMS and the statistics on their physical and orbital parameters. This paper presents an interesting addition to the small number of confirmed GEMS, particularly notable since its formation necessitates massive, dust-rich protoplanetary discs and high accretion efficiency (>10\%).",

author = "Bernab{\`o}, \{Lia Marta\} and Shubham Kanodia and Ca{\~n}as, \{Caleb I.\} and Cochran, \{William D.\} and Szil{\'a}rd Csizmadia and Suvrath Mahadevan and Gudhmundur Stef{\'a}nsson and Gupta, \{Arvind F.\} and Andrew Monson and Kobulnicky, \{Henry A.\} and Larsen, \{Alexander K.\} and Cotter, \{Ethan G.\} and Alexina Birkholz and Swaby, \{Tera N.\} and Gregory Zeimann and Bender, \{Chad F.\} and Diddams, \{Scott A.\} and Libby-Roberts, \{Jessica E.\} and Lin, \{Andrea S. J.\} and Ninan, \{Joe P.\} and Heike Rauer and Varghese Reji and Paul Robertson and Arpita Roy and Christian Schwab",

note = "{\textcopyright} 2024. 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 = "2024",

month = dec,

day = "1",

doi = "10.3847/1538-3881/ad7fe8",

language = "English",

volume = "168",

pages = "1--14",

journal = "Astronomical Journal",

issn = "0004-6256",

publisher = "American Astronomical Society",

number = "6",

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Bernabò, LM, Kanodia, S, Cañas, CI, Cochran, WD, Csizmadia, S, Mahadevan, S, Stefánsson, G, Gupta, AF, Monson, A, Kobulnicky, HA, Larsen, AK, Cotter, EG, Birkholz, A, Swaby, TN, Zeimann, G, Bender, CF, Diddams, SA, Libby-Roberts, JE, Lin, ASJ, Ninan, JP, Rauer, H, Reji, V, Robertson, P, Roy, A & Schwab, C 2024, 'Searching for GEMS: TOI-6383Ab, a giant planet transiting an M3-dwarf star in a binary system', Astronomical Journal, vol. 168, no. 6, 273, pp. 1-14. https://doi.org/10.3847/1538-3881/ad7fe8

TY - JOUR

T1 - Searching for GEMS

T2 - TOI-6383Ab, a giant planet transiting an M3-dwarf star in a binary system

AU - Bernabò, Lia Marta

AU - Kanodia, Shubham

AU - Cañas, Caleb I.

AU - Cochran, William D.

AU - Csizmadia, Szilárd

AU - Mahadevan, Suvrath

AU - Stefánsson, Gudhmundur

AU - Gupta, Arvind F.

AU - Monson, Andrew

AU - Kobulnicky, Henry A.

AU - Larsen, Alexander K.

AU - Cotter, Ethan G.

AU - Birkholz, Alexina

AU - Swaby, Tera N.

AU - Zeimann, Gregory

AU - Bender, Chad F.

AU - Diddams, Scott A.

AU - Libby-Roberts, Jessica E.

AU - Lin, Andrea S. J.

AU - Ninan, Joe P.

AU - Rauer, Heike

AU - Reji, Varghese

AU - Robertson, Paul

AU - Roy, Arpita

AU - Schwab, Christian

N1 - © 2024. 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 - 2024/12/1

Y1 - 2024/12/1

N2 - We report on the discovery of a transiting giant planet around the 3500 K M3-dwarf star TOI-6383A located 172 pc from Earth. It was detected by the Transiting Exoplanet Survey Satellite and confirmed by a combination of ground-based follow-up photometry and precise radial velocity measurements. This planet has an orbital period of ∼1.791 days, a mass of 1.040 ± 0.094 MJ, and a radius of 1.008−0.033+0.036RJ, resulting in a mean bulk density of 1.26−0.17+0.18 g cm−3. TOI-6383A has an M dwarf companion star, TOI-6383B, which has a stellar effective temperature of Teff ∼ 3100 K and a projected orbital separation of 3126 au. TOI-6383A is a low-mass dwarf star hosting a giant planet and is an intriguing object for planetary evolution studies due to its high planet-to-star mass ratio. This discovery is part of the Searching for Giant Exoplanets around M-dwarf Stars (GEMS) Survey, intending to provide robust and accurate estimates of the occurrence of GEMS and the statistics on their physical and orbital parameters. This paper presents an interesting addition to the small number of confirmed GEMS, particularly notable since its formation necessitates massive, dust-rich protoplanetary discs and high accretion efficiency (>10%).

AB - We report on the discovery of a transiting giant planet around the 3500 K M3-dwarf star TOI-6383A located 172 pc from Earth. It was detected by the Transiting Exoplanet Survey Satellite and confirmed by a combination of ground-based follow-up photometry and precise radial velocity measurements. This planet has an orbital period of ∼1.791 days, a mass of 1.040 ± 0.094 MJ, and a radius of 1.008−0.033+0.036RJ, resulting in a mean bulk density of 1.26−0.17+0.18 g cm−3. TOI-6383A has an M dwarf companion star, TOI-6383B, which has a stellar effective temperature of Teff ∼ 3100 K and a projected orbital separation of 3126 au. TOI-6383A is a low-mass dwarf star hosting a giant planet and is an intriguing object for planetary evolution studies due to its high planet-to-star mass ratio. This discovery is part of the Searching for Giant Exoplanets around M-dwarf Stars (GEMS) Survey, intending to provide robust and accurate estimates of the occurrence of GEMS and the statistics on their physical and orbital parameters. This paper presents an interesting addition to the small number of confirmed GEMS, particularly notable since its formation necessitates massive, dust-rich protoplanetary discs and high accretion efficiency (>10%).

UR - https://www.scopus.com/pages/publications/85210274376

U2 - 10.3847/1538-3881/ad7fe8

DO - 10.3847/1538-3881/ad7fe8

M3 - Article

AN - SCOPUS:85210274376

SN - 0004-6256

VL - 168

SP - 1

EP - 14

JO - Astronomical Journal

JF - Astronomical Journal

IS - 6

M1 - 273

ER -

Searching for GEMS: TOI-6383Ab, a giant planet transiting an M3-dwarf star in a binary system

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