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On the 9.25 minute X ray oscillations of V471 Tauri

  • Edward M. Sion
Cataclysmic Variables
Part of the Lecture Notes in Physics book series (LNP, volume 274)

Abstract

The 9.25 minute x ray oscillations discovered recently by K. Jensen (1985) in V471 Tauri using EXOSAT, arise from the DA2 white dwarf (Jensen, et al. 1986). One possible explanation of the oscillations is x ray modulation due to a rotating, magnetized, accreting degenerate (Jensen, et al 1986). The results of model calculations of accretion and diffusion of wind/flare material onto the V471 Tau white dwarf are presented as a test of this interpretation. Weak line features constrain the field if they arise from a polar accretion area. It is shown that rotational modulation of x-ray, opaque accretion poles is probably may not be the correct explanation unless the white dwarf is strongly magnetic, accreting matter at a rate of 10-−15M yr. −1, but has much larger polar accretion areas than that obtained from kinematical models of the accretion flow.

Keywords

Accretion Rate White Dwarf Accretion Flow International Ultraviolet Explorer Radiative Acceleration 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 1987

Authors and Affiliations

  • Edward M. Sion
    • 1
  1. 1.Department of Astronomy and AstrophysicsVillanova UniversityVillanovaU.S.A.

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