A Thick Volatile Atmosphere on the Ultrahot Super-Earth TOI-561 b

Johanna K. Teske, Nicole L. Wallack, Anjali A. A. Piette +10

Ultrashort-period (USP) exoplanets -- with $R_p\le 2$R${}_{\oplus }$ and periods $\le$1 day -- are expected to be stripped of volatile atmospheres by intense host star irradiation…