Abstract
We confirm TOI-4201 b as a transiting Jovian mass planet orbiting an early M dwarf discovered by the Transiting Exoplanet Survey Satellite. Using ground-based photometry and precise radial velocities from NEID and the Planet Finder Spectrograph, we measure a planet mass of 2.59+0.07-0.06, making this one of the most massive planets transiting an M-dwarf. The planet is ∼0.4% the mass of its 0.63 M⊙ host and may have a heavy element mass comparable to the total dust mass contained in a typical Class II disk. TOI-4201 b stretches our understanding of core accretion during the protoplanetary phase, and the disk mass budget, necessitating giant planet formation to either take place much earlier in the disk lifetime or perhaps through alternative mechanisms like gravitational instability.
Original language | English |
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Article number | L22 |
Pages (from-to) | 1-12 |
Number of pages | 12 |
Journal | Astrophysical Journal Letters |
Volume | 962 |
Issue number | 2 |
DOIs | |
Publication status | Published - 13 Feb 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.Keywords
- Exoplanet detection methods
- Exoplanet astronomy
- Exoplanet formation
- Exoplanets
- Radial velocity
- Transit photometry
- Extrasolar gaseous planets