| Issue |
A&A
Volume 635, March 2020
|
|
|---|---|---|
| Article Number | L14 | |
| Number of page(s) | 4 | |
| Section | Letters to the Editor | |
| DOI | https://doi.org/10.1051/0004-6361/202037551 | |
| Published online | 02 April 2020 | |
Letter to the Editor
Orbital inclination and mass of the exoplanet candidate Proxima c
1
LESIA, Observatoire de Paris, Université PSL, CNRS, Sorbonne Université, Univ. Paris Diderot, Sorbonne Paris Cité, 5 place Jules Janssen, 92195 Meudon, France
e-mail: pierre.kervella@obspm.fr
2
GEPI, Observatoire de Paris, Université PSL, CNRS, 5 Place Jules Janssen, 92195 Meudon, France
3
LUTH, Observatoire de Paris, Université PSL, 5 Place Jules Janssen, 92195 Meudon, France
Received:
22
January
2020
Accepted:
12
March
2020
We analyze the orbital parameters of the recently discovered exoplanet candidate Proxima c using a combination of its spectroscopic orbital parameters and Gaia DR2 astrometric proper motion anomaly. We obtain an orbital inclination of i = 152 ± 14 deg, corresponding to a planet mass of mc = 12−5+12 M⊕, comparable to Uranus and Neptune. While the derived orbital parameters are too uncertain to accurately predict the position of the planet for a given epoch, we present a map of its probability of presence relative to its parent star in the coming years.
Key words: astrometry / planetary systems / planets and satellites: individual: Proxima c / proper motions / celestial mechanics / planets and satellites: fundamental parameters
© P. Kervella et al. 2020
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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