Betelgeuse's Buddy: X-Ray Constraints on the Nature of $\alpha$ Ori B

Anna J. G. O'Grady, Brendan O'Connor, Jared A. Goldberg +8

The $\sim$$2100$d Long Secondary Period of Betelgeuse's optical lightcurve and radial velocity motivated the prediction of a low-mass stellar companion, expected to be at maximal a…