Hostname: page-component-5c6d5d7d68-vt8vv Total loading time: 0.001 Render date: 2024-08-08T11:40:54.756Z Has data issue: false hasContentIssue false
  • English
  • Français

Photometric Analysis of Wide and Narrow Hα Band Observations of R Canis Majoris

Published online by Cambridge University Press:  07 August 2017

M. Taghi Edalati ,
Timothy Banks  and
Edwin Budding
M. Taghi Edalati
Affiliation:
Physics and Astronomy Department, University of Nebraska, Lincoln, NE 68588, U.S.A. Physics Department, Victoria University of Wellington, P.O. Box 600, New Zealand
Timothy Banks
Affiliation:
Physics Department, School of Sciences, University of Ferdowski, Mashhad, Iran Carter Observatory, P.O. Box 2909, Wellington, New Zealand
Edwin Budding
Affiliation:
Physics Department, School of Sciences, University of Ferdowski, Mashhad, Iran Carter Observatory, P.O. Box 2909, Wellington, New Zealand

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Wide and narrow Hα lightcurves of R CMa were analysed using Wilson-Devinney (WD) and Information Limit Optimisation Technique (ILOT) approaches. A range of mass ratios, tested by both methods, led to an optimal estimate of around 0.45, at variance with the spectroscopic value. The distortion on the light curve affects the modelling, and so, in a second fitting, this was represented by a ‘hot spot’, associated with mass transfer effects. A semi-detached configuration was then derived. This is supported by the form of the Hα index variation, which has also been modelled. Although thus appearing as a ‘classical Algol’ system, R CMa retains its inherent peculiarity of low mass ratio with low period, which cannot be reconciled with conservative evolution scenarios.

Type
Oral and Contributed Papers
Information
Symposium - International Astronomical Union , Volume 151: Evolutionary Processes in Interacting Binary Stars , 1992 , pp. 303 - 306
Copyright
Copyright © Kluwer 1992 

References

Al Naimiy, H. M., 1981, Astrophys. Space Sci. , 53, 181.Google Scholar
Banks, T. and Budding, E., 1990 Astrophys. Space Sci. , 167, 221.Google Scholar
Banks, T., Sullivan, D. J., Budding, E., 1990, Astrophys. Space Sci. , 173, 77.Google Scholar
Budding, E., 1977, Astrophys. Space Sci. , 72, 369.Google Scholar
Budding, E., 1985, Astrophys. Space Sci. , 118, 241.CrossRefGoogle Scholar
Budding, E, and Zeilik, M., Astrophys. J. , 319, 827.CrossRefGoogle Scholar
Edalati, M. T., Khalesse, B., Riazi, N., 1989, Astrophys. Space Sci. , 154, 1.Google Scholar
Guinan, E. F., 1977, Astron. J. , 82, 51 Google Scholar
Guinan, E. F., and Ianna, P. H., 1983, Astron. J. , 88, 126.Google Scholar
Khan, M. A. and Budding, E., 1986, Astrophys. Space Sci. , 125, 219.Google Scholar
Kopal, Z., 1959, Close Binary Systems , Chapman and Hall, London.Google Scholar
Lubow, S. H. and Shu, F. H., 1975, Astrophys. J. , 198, 383.Google Scholar
Prendergast, K. H. and Taam, R. E., 1974, Astrophys. J. , 189, 125.Google Scholar
Okazaki, A., 1978, Publ. Astron. Soc. Japan , 29, 289.Google Scholar
Tomkin, J., 1985, Astrophys. J. , 297, 250.CrossRefGoogle Scholar
Tomkin, J. and Lambert, D. L., 1989, Mon. Not. R. Astr. Soc. , 241, 777.CrossRefGoogle Scholar
Wilson, R. E. and Devinney, E. J., 1971, Astrophys. J. , 166, 605.CrossRefGoogle Scholar