Ultraviolet and optical studies of binaries with luminous cool primaries and hot companions. II. BVRI observations.
Abstract
Johnson system BVRI measurements are presented for 117 stars, most of them with no previous R and I photometry and many with no previous B and V. The prime objects for measurement are unresolved or nearly unresolved binaries containing a late-type giant or supergiant and an early-type companion. Other objects on the program include suspected binaries and other F-G giants and supergiants lacking at least R and I magnitudes. The variable F and G supergiants 1 Mon, 89 Her, HR 7308, HR 8157, HR 8752, and rho-Cas and the eclipsing systems W Ser and ST Aqr were observed; HR 8752 showed significant dimming and cooling over 125 days. Several of Halliwell's (1979) candidates for nearby stars were measured.
- Publication:
-
The Astrophysical Journal Supplement Series
- Pub Date:
- May 1982
- DOI:
- 10.1086/190794
- Bibcode:
- 1982ApJS...49..175P
- Keywords:
-
- Binary Stars;
- Giant Stars;
- Hot Stars;
- Late Stars;
- Stellar Luminosity;
- Ubv Spectra;
- A Stars;
- B Stars;
- F Stars;
- G Stars;
- Stellar Spectrophotometry;
- Supergiant Stars;
- Ultraviolet Spectra;
- Astronomy