Kavli Affiliate: Andrew Vanderburg
| First 5 Authors: Alyssa R. Jankowski, Juliette Becker, Melinda Soares-Furtado, Andrew Vanderburg, Zijun He
| Summary:
Ultra-short-period (USP) planets are a rare but dynamically significant
subset of the exoplanet sample, and understanding their dynamical histories and
migration processes is necessary to build a complete picture of the outcomes of
planet formation. In this work, we present an analysis of system age
constraints and the impact of tidal evolution in the TOI-1937A system, a
component of a large-separation stellar binary with an ambiguous age constraint
that hosts a massive (> 2 $M_{Jup}$) USP planetary companion. Through a suite
of tidal evolution simulations and analysis of the transit timing variations
present in the photometric data, we find that the ultra-hot Jupiter TOI-1937Ab
is likely undergoing orbital decay driven by tidal interactions, and we place
an observational upper limit on its decay rate of |$dot{P}$| < 0.09. We
consider three different hypotheses for the system age based on three distinct
methods of age estimation. These three age limits are complemented by indirect
evidence of the age of the star that comes from our dynamical and transit
timing analyses. We discuss the possibility that future data will provide more
concrete constraints on the tidal parameters of TOI-1937Ab and its host star.
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