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24 June 2024
 
  » arxiv » 2302.00413

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A dynamical mass for GJ 463 b: A massive super-Jupiter companion beyond the snow line of a nearby M dwarf
A. Sozzetti ;
Date 1 Feb 2023
AbstractWe 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 $i_b=152^{+2}_{-3}$ deg (for a prograde orbit) and a mass ratio $q=0.0070pm0.0007$, corresponding to a true mass of the companion $M_b=3.6pm0.4$ M$_mathrm{Jup}$. True mass determinations for a super-Jupiter companion at intermediate orbital separations beyond the snow line around low-mass stars ($M_starleq 0.5$ M$_odot$) are a rare occurrence. Its existence is possibly explained in the context of disk-instability models of planet formation.
Source arXiv, 2302.00413
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