Kepler-503b: an object at the hydrogen burning mass limit orbiting a subgiant star
CI Cañas, CF Bender, S Mahadevan… - The Astrophysical …, 2018 - iopscience.iop.org
The Astrophysical Journal Letters, 2018•iopscience.iop.org
Using spectroscopic radial velocities with the Apache Point Observatory Galaxy Evolution
Experiment (APOGEE) instrument and Gaia distance estimates, we demonstrate that Kepler-
503b, currently considered a validated Kepler planet, is in fact a brown-dwarf/low-mass star
in a nearly circular 7.2-day orbit around a subgiant star. Using a mass estimate for the
primary star derived from stellar models, we derive a companion mass and radius of
0.075±0.003 M⊙(78.6±3.1 M Jup) and ${0.099} _ {-0.004}^{+ 0.006}\,{R} _ {\odot} $
Experiment (APOGEE) instrument and Gaia distance estimates, we demonstrate that Kepler-
503b, currently considered a validated Kepler planet, is in fact a brown-dwarf/low-mass star
in a nearly circular 7.2-day orbit around a subgiant star. Using a mass estimate for the
primary star derived from stellar models, we derive a companion mass and radius of
0.075±0.003 M⊙(78.6±3.1 M Jup) and ${0.099} _ {-0.004}^{+ 0.006}\,{R} _ {\odot} $
Abstract
Using spectroscopic radial velocities with the Apache Point Observatory Galaxy Evolution Experiment (APOGEE) instrument and Gaia distance estimates, we demonstrate that Kepler-503b, currently considered a validated Kepler planet, is in fact a brown-dwarf/low-mass star in a nearly circular 7.2-day orbit around a subgiant star. Using a mass estimate for the primary star derived from stellar models, we derive a companion mass and radius of 0.075±0.003 M⊙(78.6±3.1 M Jup) and
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