Details

Autor(en) / Beteiligte

• Hobson, Melissa J.
• Jordán, Andrés
• Bryant, E. M.
• Brahm, R.
• Bayliss, D.
• Hartman, J. D.
• Bakos, G. Á.
• Henning, Th
• Almenara, Jose Manuel
• Barkaoui, Khalid
• Benkhaldoun, Zouhair
• Bonfils, Xavier
• Bouchy, François
• Charbonneau, David
• Cointepas, Marion
• Collins, Karen A.
• Eastman, Jason D.
• Ghachoui, Mourad
• Gillon, Michaël
• Goeke, Robert F.
• Horne, Keith
• Irwin, Jonathan M.
• Jehin, Emmanuel
• Jenkins, Jon M.
• Latham, David W.
• Moldovan, Dan
• Murgas, Felipe
• Pozuelos, Francisco J.
• Ricker, George R.
• Schwarz, Richard P.
• Seager, S.
• Srdoc, Gregor
• Striegel, Stephanie
• Timmermans, Mathilde
• Vanderburg, Andrew
• Vanderspek, Roland
• Winn, Joshua N.

Titel

TOI-3235 b: A Transiting Giant Planet around an M4 Dwarf Star

Ist Teil von

• Astrophysical journal. Letters, 2023-03, Vol.946 (1), p.L4

Ort / Verlag

Austin: The American Astronomical Society

Erscheinungsjahr

2023

Link zum Volltext

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• Abstract 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.