Kavli Affiliate: Sara Seager
| First 5 Authors: Edward M. Bryant, Daniel Bayliss, Joel D. Hartman, Elyar Sedaghati, Melissa J. Hobson
| Summary:
Short-period gas giant planets have been shown to be significantly rarer for
host stars less massive than the Sun. We report the discovery of two transiting
giant planets – TOI-2379 b and TOI-2384 b – with low-mass (early M) host stars.
Both planets were detected using TESS photometry and for both the transit
signal was validated using ground based photometric facilities. We confirm the
planetary nature of these companions and measure their masses using radial
velocity observations. We find that TOI-2379 b has an orbital period of 5.469 d
and a mass and radius of $5.76pm0.20$ M$_{J}$ and $1.046pm0.023$ R$_{J}$ and
TOI-2384 b has an orbital period of 2.136 d and a mass and radius of
$1.966pm0.059$ M$_{J}$ and $1.025pm0.021$ R$_{J}$. TOI-2379 b and TOI-2384 b
have the highest and third highest planet-to-star mass ratios respectively out
of all transiting exoplanets with a low-mass host star, placing them uniquely
among the population of known exoplanets and making them highly important
pieces of the puzzle for understanding the extremes of giant planet formation.
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