Skip to main content
SpringerLink
Log in

Apsidal motion in the eclipsing binary system of BW AQR

  • Published:
Astrophysics and Space Science Aims and scope Submit manuscript

Abstract

The first photoelectric light curve of the eclipsing binary system BW Aqr (F71V+F81V;P=6d.7;V=10m.31), discovered by Miss Leavitt at the beginning of the century, was obtained. The photometric elements were detemined. The components of this system are considerably evolved stars: the age of the system is about 2×109 yr. It follows from the photometric data that the secondary component should have greater mass than the primary one The zero-age spectral classes of components were F2V and F1V. The system has an elliptical orbit with the eccentricitye=0.18. The angular rate of the apsidal motion (ωobs = 0.070 deg yr−1) and the corresponding value of the apsidal parameterk 2=0.0090 (the relativistic term included) were found. The derived valuek 2 exceeds by more than a factor of 2 the theoretical coefficient obtained from the modern theory of internal structure of stars with moderate masses\(\left( {\mathfrak{M} = {\text{1}}{\text{.35 }}\mathfrak{M}_ \odot } \right)\).

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  • Cisneros-Parra, J. U.: 1970,Astron Astrophys. 8, 141.

    Google Scholar 

  • Cowling, T. G.: 1938,Monthly Notices Roy. Astron. Soc. 98, 734.

    Google Scholar 

  • Grygar, J., Cooper, M. L., and Jurkevich, I.: 1972,Bull. Astron. Inst. Czechoslovakia 23, 147.

    Google Scholar 

  • Hayes, D. S.: 1978, in A. G. D. Philip (ed.), ‘The H-R Diagram’,IAU Symp. 80, 65.

    Google Scholar 

  • Jeffery, C. S.: 1984,Monthly Notices Roy. Astron. Soc. 207, 323.

    Google Scholar 

  • Khaliullin, Kh. F.: 1985,Astrophys. J. (in press).

  • Khaliullin, Kh. F., Mironov, A. V., and Moshkalev, V. G.: 1985,Astrophys. Space Sci. 111, 291.

    Google Scholar 

  • Khaliullina, A. I. and Khaliullin, Kh. F.: 1984,Soviet Astron. 28.

  • Kopal, Z.: 1978,Dynamics of Close Binary Systems, D. Reidel Publ. Co., Dordrecht, Holland.

    Google Scholar 

  • Kreiner, J. M.: 1970,Acta Astron. 20, No. 1, 19.

    Google Scholar 

  • Martynov, D. Ya. and Khaliullin, Kh. F.: 1980,Astrophys. Space Sci 71, 147.

    Google Scholar 

  • Mathis, Z. S.: 1967,Astrophys. J. 149, 619.

    Google Scholar 

  • Pickering, E. C.: 1908,Harvard Circ. No. 142.

  • Robinson, L.: 1968,Variable Stars 16, No. 3, 358 (in Russian).

    Google Scholar 

  • Sterne, T. E.: 1939,Monthly Notices Roy. Astron. Soc. 99, 451, 662.

    Google Scholar 

  • Wolf, G. W. and Kern, J. T.: 1983,Astrophys. J. Suppl. 52, 429.

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Sternberg Astronomical Institute, Moscow, U.S.S.R.

    Kh. F. Khaliullin & V. S. Kozureva

Authors
  1. Kh. F. Khaliullin
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. V. S. Kozureva
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Khaliullin, K.F., Kozureva, V.S. Apsidal motion in the eclipsing binary system of BW AQR. Astrophys Space Sci 120, 9–16 (1986). https://doi.org/10.1007/BF00653896

Download citation

  • Received:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF00653896

Keywords

Search

Navigation