International Summer Institute for Modeling in Astrophysics
Searching for radiative instabilites in massive star envelopes
- Author(s): Liu, Shangfei
- Krumholz, Mark
- Stancliffe, Richard
- et al.
We investigate local radiative hydrodynamic instabilities in the envelopes of massive stars. Two different stellar models are considered, a simple polytropic model and a more realistic stellar evolution code model. For both cases, we compare the local optical depth and radiative flux with analytically derived instability criteria. Only a thin outer shell of the star, containing a mass of about 10-6 Mstar to 10-5 Mstar, can be subjected to this instability. However, the growth rate of the instability is relatively fast (about 10,000s) indicating a possible run-away effect.