Discovery of a substellar companion in the TESS light curve of the $\delta$ Scuti/$\gamma$ Doradus hybrid pulsator HD 31221

Sz. Kálmán, A. Derekas, Sz. Csizmadia +9

Close-in, sub-stellar companions to $\delta$ Scuti type stars present a highly suitable testbed for examining how planetary-mass objects can influence stellar pulsations. We aim to cons…