Abstract
A detailed investigation of the evolution of low-mass binaries is performed for the case when the secondary fills its Roche lobe at the stage of core hydrogen exhaustion. The obtained results are compared with observational data for ultra-short periodic X-ray systems MXB 1820-30 and MXB 1916-05. In the frame of the proposed evolutionary scenario it is possible to obtain for MXB 1820-30 its periodP=11.4 min twice (see Figure 2). In the first case the parameters of the system are:M 2 ≈ 0.13−0.15M ⨀,X≈0.05–0.13, |P/P| ≈ (3.6−6.2) } 10−7 yr−1, M2 ≈ (4.1−9.6) } 10−9 M ⨀ yr−1, for the second:M 2 ≈ 0.08−0.09M ⨀,X= 0, |P/P| ≈ (1.3−1.5) } 10−7 yr−1, M2 ≈ (1.4−1.8) } 10−8 M ⨀ yr−1. It is suggested that MXB 1916-05 is the progenitor of the system MXB 1820-30 (M 2 = 0.1M⨀,X ≃ 0.221,M 2 ≃ 1.8 × 10−10 M ⨀ yr−1).
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Bahcall, J. N., Huebner, W. F., Lubow, S. H., Packer, P. D., and Ulrich, R. K.: 1982,Rev. Mod. Phys. 54, 767.
Bailyn, C. D. and Grindlay, J. E.: 1987,Astrophys. J. 316, L25.
Carney, B. W.: 1980,Astrophys. J. Suppl. Ser. 42, 481.
Fontaine, G., Graboske, H. C., and Van Horn, H. M.: 1977,Astrophys. J. Suppl. Ser. 35, 293.
Fujimoto, M. Y.: 1987, Preprint.
Hachisu, I., Miyaji, S., and Saio, H.: 1987, Preprint Space Science Laboratory N87-133.
Harris, M. J., Fowler, W. A., Caughlan, G. R., and Zimmerman, B. A.: 1983,Ann. Rev. Astron. Astrophys. 21, 165.
Landau, L. D. and Lifschitz, E. M.: 1962,Teoriya polya, Fizmatgiz, Moscow.
Lapidus, M. I. and Sunyaev, R. A.: 1985,Monthly Notices Roy. Astron. Soc. 217, 291.
Liller, M. H. and Carney, B. W.: 1977,Astrophys. J. 224, 383.
Morgan, E.et al.: 1986,IAU Circ., No. 4261.
Paczyński, B.: 1969,Acta Astron. 19, 1.
Paczyński, B.: 1971,Ann. Rev. Astron. Astrophys. 9, 183.
Paczyński, B.: 1981,Acta Astron. 31, 1.
Skumanich, A.: 1972,Astrophys. J. 171, 565.
Spruit, H. C. and Ritter, H.: 1983,Astron. Astrophys. 124, 267.
Taam, R. E. and Wade, R. A.: 1985,Astrophys. J. 293, 504.
Tutukov, A. V. and Yungelson, L. R.: 1979,Acta Astron. 29, 665.
Tutukov, A. V., Fedorova, A. V., Ergma, E. V., and Yungelson, L. R.: 1985,Pisma Astron. J. 11, 123.
Tutukov, A. V., Fedorova, A. V., Ergma, E. V., and Yungelson, L. R.: 1986,Astrofizika 24, 85.
Tutukov, A. V., Fedorova, A. V., Ergma, E. V., and Yungelson, L. R.: 1987,Pisma Astron. J. 13, 780.
Vacca, W. D., Lewin, W. H. G., and Van Paradijs, J.: 1986,Monthly Notices Roy. Astron. Soc. 220, 339.
Verbunt, F.: 1987,Astrophys. J. 312, L23.
Verbunt, F. and Zwaan, C.: 1981,Astron. Astrophys. 100, L7.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Fedorova, A.V., Ergma, E.V. Evolution of binaries with ultra-short periods: Systematic study. Astrophys Space Sci 151, 125–134 (1989). https://doi.org/10.1007/BF00643634
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00643634