Such bubbles can appear around single (or a few stars) but also around clusters where the collective stellar action creates large structures called "superbubbles" or "supershells".
She notably helped identifying them,[15] derived their kinematics with optical spectra to constrain the energy feedback and physics at the interfaces,[16] and analyzed in detail their X-ray emission.
[17] In this context, she was the first to report on the presence of X-rays from the central star as well as hot (1.7 MK), diffuse gas associated to Cat's eye planetary nebula.
If a surviving companion or the circumstellar medium from the progenitor’s mass loss is detected, the origin of single degenerate scenario for a Type Ia supernova can be affirmed.
You-Hua Chu organized a team to use the Hubble Space Telescope to search for a surviving companion star within Type Ia supernova remnants in the Large Magellanic Cloud.
[23][24][25] The results show that the single degenerate scenario for Type Ia supernovae can be more prevalent than people previously thought in the Milky Way.