C IV and Si IV IUE spectra of normal B8-A0 stars: UV identified Be/Ae stars?
Abstract
Archival IUE high dispersion spectra of 42 B6-A2 stars within 200 pc were surveyed. Five of the program stars show significant C IV and Si IV absorption. All of the stars with detected C IV have v sin i less than or = 190 km/sec. Sharp absorption cores are present in Si II lambda 1533 in 3 of the objects, indicating that these are previously unrecognized shell stars. Three of the stars have variable or asymmetric C IV profiles which are consistent with the C IV and Si IV being produced in stellar winds. One star has C IV in the form of a shortward-shifted discrete absorption component, similar to those observed in Be stars. The data are compared with similar data for Be and B shell stars.
- Publication:
-
ESA Special Publication
- Pub Date:
- June 1988
- Bibcode:
- 1988ESASP.281a.397C
- Keywords:
-
- B Stars;
- Iue;
- Spaceborne Astronomy;
- Stellar Spectra;
- Ultraviolet Astronomy;
- Ultraviolet Spectra;
- Interstellar Matter;
- Shell Stars;
- Stellar Winds;
- Astronomy