Betelgeuse, Betelgeuse, Betelgeuse, Betel-buddy? Constraints on the dynamical companion to $\alpha$ Orionis from HST

Jared A. Goldberg, Anna J. G. O'Grady, Meridith Joyce +10

Recently, two independent analyses have asserted that the cause of the Long Secondary Period (LSP) observed in the variability spectrum of our nearest red supergiant, Betelgeuse ($…