OB Stars in the P Cygni Region.
Abstract
A region of 89 square degrees around P Cygni was examined for faint OB stars. The 4 objective prism in conjunction with the Burrell Schmidt-type telescope was used for this purpose. Within this area, 249 OB stars are present; of these, 136 were published in a previous survey and the rest are given in the present paper. The greatest number of stars of the latter group are faint (limiting photographic magnitude 12.2). The surface distributions of the stars of the two groups are approximately the same. The photoelectric colors of 140 OB stars were available for the present discussion; of these, the colors of 90 stars were determined at Case. A number of highly reddened stars were found, 9 of which have C1 color between 0.40 and 0.65 mag. The two groups of stars appear to be at the same distance, with a distance modulus of 11.1 mag.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- May 1952
- DOI:
- 10.1086/145559
- Bibcode:
- 1952ApJ...115..459N