New insight into the variability of the Be star $\pi$ Aquarii: Determination of stellar and disk parameters

D. Concha, C. Arcos, D. Turis-Gallo +4

The Be star $\pi$ Aquarii shows peculiar $\gamma$ Cas-type X-ray emission, likely caused by its outer disk interacting with a low-mass companion, probably a white dwarf. We study the long…