Chandra HETG X-ray Spectra and Variability of $\pi$ Aqr, a $\gamma$ Cas-type Be star

David P. Huenemoerder, Pragati Pradhan, Claude R. Canizares +7

High-resolution X-ray spectra of $\pi$Aqr, a $\gamma$Cas-type star, obtained with the Chandra/HETG grating spectrometer, revealed emission lines of H-like ions of Mg, Si, S, and Fe, a…