The Herbig Ae/Be stars associated with nebulosity.
Abstract
A catalog of 57 Herbig Ae/Be stars and Herbig Ae/Be star candidates is presented. Fifty percent of the stars have double-peak H-alpha profiles separated by a nearly unshifted absorption component, while 25 percent have single-peak H-alpha profiles and 20 percent have P Cygni profiles. Qualitative wind properties are derived for stars with P Cygni line profiles in H-alpha and Na D. The photometric variation properties of early and late type Herbig Ae/Be stars are found to be quite different. The IR excesses of Herbig Ae/Be stars are much stronger than those of ordinary Be stars, and the two stellar groups are shown to be well separated in the H-K, K-L two-color diagram. Stars later than B6 are generally located above the main sequence in the HR diagram, which confirms that most of these stars are still in the premain-sequence stage of evolution.
- Publication:
-
Astronomy and Astrophysics Supplement Series
- Pub Date:
- January 1984
- Bibcode:
- 1984A&AS...55..109F
- Keywords:
-
- A Stars;
- Astronomical Catalogs;
- B Stars;
- Early Stars;
- Stellar Envelopes;
- Stellar Evolution;
- Emission Spectra;
- H Alpha Line;
- Herbig-Haro Objects;
- Infrared Astronomy;
- Protostars;
- Stellar Winds;
- Variable Stars;
- Astronomy;
- Ae Stars:Infrared Excesses;
- Ae Stars:Line Profiles;
- Ae Stars:Luminosities;
- Ae Stars:Stellar Winds;
- Ae Stars:Variations;
- Infrared Excesses:Ae Stars;
- Line Profiles:Ae Stars;
- Luminosities:Ae Stars;
- Stellar Winds:Ae Stars