Kavli Affiliate: Avi Shporer
| First 5 Authors: Jack Schulte, Joseph E. Rodriguez, Allyson Bieryla, Samuel N. Quinn, Karen A. Collins
| Summary:
Hot Jupiters were many of the first exoplanets discovered in the 1990s, but
in the decades since their discovery, the mysteries surrounding their origins
remain. Here, we present nine new hot Jupiters (TOI-1855 b, TOI-2107 b,
TOI-2368 b, TOI-3321 b, TOI-3894 b, TOI-3919 b, TOI-4153 b, TOI-5232 b, and
TOI-5301 b) discovered by NASA’s TESS mission and confirmed using ground-based
imaging and spectroscopy. These discoveries are the first in a series of papers
named the Migration and Evolution of giant ExoPlanets (MEEP) survey and are
part of an ongoing effort to build a complete sample of hot Jupiters orbiting
FGK stars, with a limiting Gaia $G$-band magnitude of 12.5. This effort aims to
use homogeneous detection and analysis techniques to generate a set of
precisely measured stellar and planetary properties that is ripe for
statistical analysis. The nine planets presented in this work occupy a range of
masses (0.55 Jupiter masses (M$_{rm{J}}$) $<$ M$_{rm{P}}$ $<$ 3.88
M$_{rm{J}}$) and sizes (0.967 Jupiter radii (R$_{rm{J}}$) $<$ R$_{rm{P}}$
$<$ 1.438 R$_{rm{J}}$) and orbit stars that range in temperature from 5360 K
$<$ Teff $<$ 6860 K with Gaia $G$-band magnitudes ranging from 11.1 to 12.7.
Two of the planets in our sample have detectable orbital eccentricity: TOI-3919
b ($e = 0.259^{+0.033}_{-0.036}$) and TOI-5301 b ($e = 0.33^{+0.11}_{-0.10}$).
These eccentric planets join a growing sample of eccentric hot Jupiters that
are consistent with high-eccentricity tidal migration, one of the three most
prominent theories explaining hot Jupiter formation and evolution.
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