HAO Colloquium - Adventures in X-ray Studies of Massive Stars

Speaker: Richard Ignace, East Tennessee State University 

X-ray studies of massive stars have provided important new information to help understand how this  important class of objects form, live, and terminate. The X-ray band allows to probe processes that drive plasma to high temperatures of millions of Kelvin associated with shock phenomena, such as wind instabilities or magnetic confinement of wind flow. I review diagnostics, such He-like triplet lines, used to confront observations in order to derive information about the properties, strength, and location of wind shocks. I will discuss the modeling of X-ray emission lines and continuum. Applications to different examples are presented: magnetic B stars HR 7355 and HR 5907 and tau Sco, B+B binaries AH Cep and CW Cep, the O star zeta Pup, and the Wolf-Rayet star WR6.

Date and time: 
Thursday, November 18, 2021 - 2:00pm to 3:00pm