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Photometric and Spectroscopic Study of R CMa*

Published online by Cambridge University Press:  12 April 2016

K. R. Radhakrishnan ,
M. B. K. Sarma  and
K. D. Abhyankar
K. R. Radhakrishnan
Affiliation:
Centre of Advances Study in Astronomy, Osmania University, Hyderabad, India
M. B. K. Sarma
Affiliation:
Centre of Advances Study in Astronomy, Osmania University, Hyderabad, India
K. D. Abhyankar
Affiliation:
Centre of Advances Study in Astronomy, Osmania University, Hyderabad, India

Abstract

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UVB Flight curves and spectrograms of R CMa obtained with the 48-inch telescope of Japal-Rangapur Observatory during 1980-82 have been used for deriving the eclipse and orbital elements as well as the absolute dimensions of the components. The primary is found to be a Main-Sequence F2V star of mass 1.52 M⊙ and the secondary a subgiant star of spectral type G8 and mass 0.20 M⊙ which fills its Roche lobe, in agreement with Kopal and Shapley (1956) results, Kopal (1959), or Sahade's (1963) results. From a consideration of the possible evolution of this system it is concluded that a large fraction of the original mass of the secondary is lost from the system. A study of the period changes indicates the possible presence of a third component of mass of about 0.5 M⊙ which is most likely to be an M dwarf.

Type
Research Article
Information
International Astronomical Union Colloquium , Volume 80: Double Stars, Physical Properties and Generic Relations , 1984 , pp. 229 - 236
Copyright
Copyright © Reidel 1984

Footnotes

*

Paper presented at the Lembang-Bamberg IAU Colloquium No. 80 on ‘Double Stars: Physical Properties and Generic Relations', held at Bandung, Indonesia, 3-7 June, 1983.

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