Issue |
A&A
Volume 670, February 2023
|
|
---|---|---|
Article Number | L17 | |
Number of page(s) | 5 | |
Section | Letters to the Editor | |
DOI | https://doi.org/10.1051/0004-6361/202245454 | |
Published online | 10 February 2023 |
Letter to the Editor
A dynamical mass for GJ 463 b: A massive super-Jupiter companion beyond the snow line of a nearby M dwarf
INAF – Osservatorio Astrofisico di Torino, Via Osservatorio 20, 10025 Pino Torinese, Italy
e-mail: alessandro.sozzetti@inaf.it
Received:
13
November
2022
Accepted:
18
January
2023
We determined the full orbital architecture and true mass of the recently Doppler-detected long-period giant planet GJ 463 b using the HIPPARCOS-Gaia proper motion anomaly in combination with the available radial velocities, constraints from the knowledge of the spectroscopic orbital parameters, and supplementary information from a sensitivity analysis of Gaia Data Release 3 astrometry. We determined an orbital inclination ib = 152−3+2 deg (for a prograde orbit) and a mass ratio q = 0.0070 ± 0.0007, corresponding to a true mass of the companion Mb = 3.6 ± 0.4 MJup. True mass determinations for a super-Jupiter companion at intermediate orbital separations beyond the snow line around low-mass stars (M⋆ ≤ 0.5 M⊙) are a rare occurrence. Its existence is possibly explained in the context of disk-instability models of planet formation.
Key words: astrometry / planets and satellites: individual: GJ 463 b / planetary systems / proper motions / planets and satellites: fundamental parameters / methods: data analysis
© The Authors 2023
Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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