Hostname: page-component-cd9895bd7-jkksz Total loading time: 0 Render date: 2024-12-24T16:14:43.628Z Has data issue: false hasContentIssue false
  • English
  • Français

Red Spectroscopy of IP Pegasi

Published online by Cambridge University Press:  12 April 2016

J.S. Martin ,
D.H.P. Jones  and
R.C Smith
J.S. Martin
Affiliation:
Astronomy Centre and Royal Greenwich Observatory, Herstmonceux Castle, East Sussex, U.K.
D.H.P. Jones
Affiliation:
Royal Greenwich Observatory, Herstmonceux Castle, East Sussex, U.K.
R.C Smith
Affiliation:
Astronomy Centre, University of Sussex, Brighton, U.K.

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.

Time resolved spectroscopy of the dwarf nova IP Pegasi in the range λλ 7670–8320Å shows absorption lines originating from the cool secondary. A radial velocity curve for this component has been derived by cross-correlation with a normal M star. The curve has semi-amplitude K2 = 288.3 ± 4 km s−1, and is slightly distorted. This distortion is equivalent to an orbit with an apparent eccentricity of 0.075 ± 0.024. The mass function of the primary is 0.394 ± 0.016M⊙. From this we derive constraints on the component masses of 0.62 < M1 < 1.14M⊙ and 0.17 < M2 < 0.71M⊙. The red star has a radius in the range 0.32 < R2 < 0.51R⊙ and is probably on the main sequence.

Type
II. Radio, IR and Optical Observations
Information
International Astronomical Union Colloquium , Volume 93: Cataclysmic Variables: Recent Multi-Frequency Observations and Theoretical Developments , 1987 , pp. 145 - 149
Copyright
Copyright © Reidel 1987

References

Boeshaar, P., 1976, Ph.D. Thesis, Ohio State University.Google Scholar
Echevarria, J., 1983, Ann. Rev. Mex. Astron. Astrof., 8, 109 Google Scholar
Eggleton, P.P., 1983, Astrophys. J., 268, 368 Google Scholar
Goranskij, V.P., Shugarov, S.Yu., Orlowsky, E.I., & Rahimov, V.Yu., 1985, IBVS no. 2653.Google Scholar
Horne, K., Lanning, H.H., & Gomer, R.H., 1982, Astrophys. J., 252, 681 Google Scholar
Lipovetskij, V.A., & Stepanyan, J.A., 1981, Astrophizica, 17, No. 3, 573.Google Scholar
Luyten, W.J., 1936, Astrophys. J., 84, 85 Google Scholar
Popper, D.M., 1980, Ann. Rev. Astron. Astrophys, 18, 115 Google Scholar
Young, P., & Schneider, D.P., 1981, Astrophys. J., 247, 960 Google Scholar
Wood, J.H., & Crawford, D.P., 1986, preprint.Google Scholar