TY - JOUR
T1 - TOI-3235 b
T2 - A Transiting Giant Planet around an M4 Dwarf Star
AU - Hobson, Melissa J.
AU - Jordán, Andrés
AU - Bryant, E. M.
AU - Brahm, R.
AU - Bayliss, D.
AU - Hartman, J. D.
AU - Bakos, G. I.
AU - Henning, Th
AU - Almenara, Jose Manuel
AU - Barkaoui, Khalid
AU - Benkhaldoun, Zouhair
AU - Bonfils, Xavier
AU - Bouchy, François
AU - Charbonneau, David
AU - Cointepas, Marion
AU - Collins, Karen A.
AU - Eastman, Jason D.
AU - Ghachoui, Mourad
AU - Gillon, Michaël
AU - Goeke, Robert F.
AU - Horne, Keith
AU - Irwin, Jonathan M.
AU - Jehin, Emmanuel
AU - Jenkins, Jon M.
AU - Latham, David W.
AU - Moldovan, Dan
AU - Murgas, Felipe
AU - Pozuelos, Francisco J.
AU - Ricker, George R.
AU - Schwarz, Richard P.
AU - Seager, S.
AU - Srdoc, Gregor
AU - Striegel, Stephanie
AU - Timmermans, Mathilde
AU - Vanderburg, Andrew
AU - Vanderspek, Roland
AU - Winn, Joshua N.
N1 - Publisher Copyright:
© 2023. The Author(s). Published by the American Astronomical Society.
PY - 2023/3/1
Y1 - 2023/3/1
N2 - We present the discovery of TOI-3235 b, a short-period Jupiter orbiting an M dwarf with a stellar mass close to the critical mass at which stars transition from partially to fully convective. TOI-3235 b was first identified as a candidate from TESS photometry and confirmed with radial velocities from ESPRESSO and ground-based photometry from HATSouth, MEarth-South, TRAPPIST-South, LCOGT, and ExTrA. We find that the planet has a mass of 0.665 ± 0.025 M J and a radius of 1.017 ± 0.044 R J. It orbits close to its host star, with an orbital period of 2.5926 days but has an equilibrium temperature of ≈ 604 K, well below the expected threshold for radius inflation of hot Jupiters. The host star has a mass of 0.3939 ± 0.0030 M ☉, a radius of 0.3697 ± 0.0018 R ☉, an effective temperature of 3389 K, and a J-band magnitude of 11.706 ± 0.025. Current planet formation models do not predict the existence of gas giants such as TOI-3235 b around such low-mass stars. With a high transmission spectroscopy metric, TOI-3235 b is one of the best-suited giants orbiting M dwarfs for atmospheric characterization.
AB - We present the discovery of TOI-3235 b, a short-period Jupiter orbiting an M dwarf with a stellar mass close to the critical mass at which stars transition from partially to fully convective. TOI-3235 b was first identified as a candidate from TESS photometry and confirmed with radial velocities from ESPRESSO and ground-based photometry from HATSouth, MEarth-South, TRAPPIST-South, LCOGT, and ExTrA. We find that the planet has a mass of 0.665 ± 0.025 M J and a radius of 1.017 ± 0.044 R J. It orbits close to its host star, with an orbital period of 2.5926 days but has an equilibrium temperature of ≈ 604 K, well below the expected threshold for radius inflation of hot Jupiters. The host star has a mass of 0.3939 ± 0.0030 M ☉, a radius of 0.3697 ± 0.0018 R ☉, an effective temperature of 3389 K, and a J-band magnitude of 11.706 ± 0.025. Current planet formation models do not predict the existence of gas giants such as TOI-3235 b around such low-mass stars. With a high transmission spectroscopy metric, TOI-3235 b is one of the best-suited giants orbiting M dwarfs for atmospheric characterization.
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U2 - 10.3847/2041-8213/acbd9a
DO - 10.3847/2041-8213/acbd9a
M3 - Article
AN - SCOPUS:85150771785
SN - 2041-8205
VL - 946
JO - Astrophysical Journal Letters
JF - Astrophysical Journal Letters
IS - 1
M1 - L4
ER -