Analysis of the FUSE Spectra of the He-Poor SDO Star MCT 0019-2441
Abstract
We present a preliminary analysis of the FUSE spectra of MCT 0019-2441, a relatively He-poor sdO star. Among the handful of absorption features of photospheric origin present in the ultraviolet, we identify the O VI doublet at 1031.9 and 1037.6 Å, the S VI doublet at 933.4 and 944.5 Å, the Si IV triplet at 1122.5 and 1128.3 Å and some N IV lines. While synthetic spectra based on NLTE line blanketed model atmospheres can reproduce most line profiles, they fail to reproduce the O VI line profiles in a satisfactory manner. Possible solutions to this puzzle are considered.
- Publication:
-
Baltic Astronomy
- Pub Date:
- 2006
- Bibcode:
- 2006BaltA..15...99F
- Keywords:
-
- stars: hot subdwarfs;
- stars: abundances;
- stars: individual (MCT 0019-2441)