The Things That Planets Go Around …and Through (Scott Wolk)

I examine AXIS's ability to examine extended stellar atmospheres. The stellar atmosphere extends tens of AU from the stellar surface and planets spend their entire existence within the turbulent stellar atmosphere. The atmosphere starts with coronal structures on the star which give rise to the winds that fill the space beyond with ionized high-velocity particles. These winds are complicated by flares which can include coronal mass ejections. If these winds collide with low-density neutral molecules X-rays can be emitted via the charge exchange process. Given extensive neutrals that might be present in a young evolving stellar system, the Charge exchange emission may be detectable by AXIS. I show examples of each phase of stellar astrospheres.