Observations of Hubble-Sandage variables in M31 and M33.
Abstract
Summary. Eight blue variables of high luminosity (Hubble-Sandage variables), three in M 31 and five in M 33 have been examined on photographs obtained at Asiago for the nova survey after 1953. Light curves are reproduced in this Paper. Var. 1 in M 31 is new, the others have been previously studied by Hubble and by Hubble and Sandage. The general characteristics found by these authors are confirmed by the present material. However, Var. B in M 33 has attained in 1963 a maximum of -9.9 B considerably brighter than previously observed. Some considerations follow. Key words: variable Stars - galaxies
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- February 1973
- Bibcode:
- 1973A&A....22..453R