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Most hot jupiters are lonely: An occurrence rate of inner companions to hot jupiters from Kepler, K2, and TESS transit photometry

Presentation #611.01 in the session Hot Jupiters and Ultra-Short Periods.

Published onApr 03, 2024
Most hot jupiters are lonely: An occurrence rate of inner companions to hot jupiters from Kepler, K2, and TESS transit photometry

Out of the > 500 transiting hot Jupiters known today, only 6 have been confirmed to have companion planets interior to their orbits. The survival of these inner companions means that these hot Jupiters cannot have migrated to their present location via dynamically disruptive high-eccentricity migration, and must have undergone disk migration or formed in situ. An occurrence rate for these inner companions, therefore, helps us constrain the relative efficiency of different hot Jupiter formation pathways. Here, we perform a uniform box least-squares search for inner companions to hot Jupiters in Kepler, K2, and the first four years of TESS data. Accounting for observational completeness, we arrive at a refined posterior distribution on the occurrence rate of inner companions to hot Jupiters. We discuss the implications of this occurrence rate and how it informs current discussions on the formation theories of hot Jupiters.

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