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Title: Absolute dimensions and evolutionary status of UW CMa
Authors: Parthasarathy, M
Keywords: Close Binaries: Evolution;Close Binaries: Light Curves;Close Binaries: Masses;Close Binaries: Photometric Elements
Issue Date: Nov-1978
Publisher: Royal Astronomical Society
Citation: Monthly Notices Royal Astronomical Society, Vol. 185, pp. 485 – 492
Abstract: Photoelectric B and V light curves of close binary system UW Canis Majoris (08.5 If +O-B) obtained by Doss are analysed. Combining the photoelectric elements and the spectroscopic orbit by Struve et al. absolute dimensions of the system are determined. The mass of the bright primary (08.5 If) components id found to be 19.3 Mө and that of the faint secondary to be 23.2 Mө. the primary has filled the Roche lobe and it is 1 – 2 mag over luminous for its mass. The massive secondary component is most likely a main sequence star. Comparison with the theoretical evolutionary models of massive close binary systems undergoing case A of mass exchange indicate that UW CMa is close to the contact stage of evolution.
ISSN: 0035-8711
Appears in Collections:IIAP Publications

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