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On the periodicity of Hubble-Sandage objects in M 31

Published online by Cambridge University Press:  12 April 2016

G. R. Ivanov
G. R. Ivanov*
Affiliation:
Department of Astronomy, University of Sofia, 1126 Sofia, Bulgaria

Extract

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The spectral and photometric characteristics of the Hubble-Sandage objects (HSO) are similar to those of the η Car and S Dor variables. They are actually referred to as S Dor-type in the General Catalogue of Variable Stars. Their light variations differ from star to star.

The aim of the present paper is to discuss a possible periodicity in HSOs in M 31. We used phtometry from Hubble(1929), Sharov(1973, 1981), Rosino and Bianchini(1973), and added some observations taken during 1980-87. The latter were obtained with the 2-m Ritchey-Chretien-Coude and 0.5-m Schmidt telescopes of the Bulgarian National Astronomical Observatory – Rozhen.

Type
Section II: Poster Papers, A Brief List of Catalogs, and Index
Information
International Astronomical Union Colloquium , Volume 113: Physics of Luminous Blue Variables , 1989 , pp. 275 - 276
Copyright
Copyright © Kluwer 1989

References

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