First Byurakan Spectral Sky Survey. Stars of Late Spectral Types. XI. Zone -7° <= δ <= -3°
Abstract
The eleventh list of faint late M and carbon type stars detected on the plates of the First Byurakan Spectral Survey in zone -7° ≤ δ ≤ -3° and covering about 1000 square degrees is presented. From 126 detected stars, 88 are newly discovered objects: they are 6 carbon stars, 8 carbon star candidates, and 74 M-type stars; among the latter 38 (26 PSC + 12 FSC) are unclassified IRAS sources, and one object is an unclassified ROSAT source. Distances to the 6 newly discovered early-type carbon stars are estimated. Equatorial coordinates, red magnitudes, and spectral classes determined from the Palomar E-charts are provided. The lack of optical counterparts on Palomar O and E maps for two detected late M-type stars indicates a large variability in brightnesses of these objects (amplitude not smaller than 7.0 magnitude).
- Publication:
-
Astrophysics
- Pub Date:
- January 2001
- DOI:
- 10.1023/A:1010997328965
- Bibcode:
- 2001Ap.....44...88G
- Keywords:
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- Large Variability;
- Spectral Type;
- Type Star;
- Carbon Type;
- Carbon Star