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Interpretation of light curves of IP Peg in a model with shockless interaction between the gas stream and disk

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Abstract

We have analyzed light curves of the eclipsing cataclysmic variable IP Peg. A model with a shockless interaction between the gaseous stream and disk (i.e., an elliptical disk with a “hot line”) can describe the main characteristic features of the light curve of the interacting close binary better than a classical model with a “hot spot” at the outer boundary of a circular accretion disk. In particular, the hot-line model can reproduce the luminosity increase observed at phases ϕ∼0.1–0.2 and ϕ∼0.5–0.6, which is not possible in the standard hot-spot model. The advantages of the hot-line model are particularly striking for the IR light curves of IP Peg: the discrepancy χ2 between the theoretical and observed light curves is 49 for the model with a shockless interaction between the gaseous stream and disk, and 2681 for the standard hot-spot model.

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Authors and Affiliations

  1. Sternberg Astronomical Institute, Universitetskii pr. 13, Moscow, 119899, Russia

    T. S. Khruzina & A. M. Cherepashchuk

  2. Institute of Astronomy, Russian Academy of Sciences, ul. Pyatnitskaya 48, Moscow, 109017, Russia

    D. V. Bisikalo & A. A. Boyarchuk

  3. Keldysh Institute of Applied Mathematics, Russian Academy of Sciences, Miusskaya pl. 4, Moscow, 125047, Russia

    O. A. Kuznetsov

Authors
  1. T. S. Khruzina
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  2. A. M. Cherepashchuk
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  3. D. V. Bisikalo
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  4. A. A. Boyarchuk
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  5. O. A. Kuznetsov
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__________

Translated from Astronomicheski\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) Zhurnal, Vol. 78, No. 7, 2001, pp. 625–641.

Original Russian Text Copyright © 2001 by Khruzina, Cherepashchuk, Bisikalo, Boyarchuk, Kuznetsov.

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Khruzina, T.S., Cherepashchuk, A.M., Bisikalo, D.V. et al. Interpretation of light curves of IP Peg in a model with shockless interaction between the gas stream and disk. Astron. Rep. 45, 538–552 (2001). https://doi.org/10.1134/1.1383813

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  • DOI: https://doi.org/10.1134/1.1383813

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