A new list of Trapezium-type multiple systems.
Abstract
A list of 412 Trapezium-type multiple star systems is compiled on the basis of data contained in the Index Catalog of Visual Double Stars (1963). The criteria used to select the Trapezium-type systems are described, and MK spectral types are more accurately determined for 100 of these systems, including 65 O and B stars. The results show that the largest percentage of Trapezium-type asterisms occurs among M-type multiple systems and that a significant fraction of 'real' Trapezium-type asterisms occurs among multiple systems where the primary component is of spectral type O-B2. It is concluded that there are also many 'real' Trapezium-type asterisms among A- and K-type multiple star systems.
- Publication:
-
Abastumanskaia Astrofizicheskaia Observatoriia Byulleten
- Pub Date:
- 1978
- Bibcode:
- 1978AbaOB..49...39S
- Keywords:
-
- Astronomical Catalogs;
- B Stars;
- Binary Stars;
- M Stars;
- O Stars;
- Star Clusters;
- Late Stars;
- Milky Way Galaxy;
- Spectrum Analysis;
- Stellar Spectra;
- Trapezoids;
- Astronomy;
- Multiple Stars:Lists