Variability of the Winds, Chromospheres and Transition Regions of Hybrid Stars
Abstract
We propose to investigate the variability of the winds, chromospheres and transition regions of hybrid stars and, hence by relating the observed variability to our earlier studies of hybrid star atmospheric structure, constrain both models of this structure and theories concerning the winds from these stars. By means of LWP-HI Mg II spectra (obtained in the 10 US2 shifts) we will derive the level and timescales of variability of the wind velocity and mass loss rate, and also of the chromospheric line fluxes. In order to relate the wind and chromospheric variability to that seen in the transition region emission lines, we will obtain, at two epochs, transition region line profiles for the star, alpha TrA, from the SWP-HI images (to be obtained in the collaborative US1/ESA shifts). The observed variability will be analysed to search for any systematic behaviour.
- Publication:
-
IUE Proposal
- Pub Date:
- 1985
- Bibcode:
- 1985iue..prop.2180L