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QPOs from post-shock accretion column of strongly magnetized accreting white dwarfs

Published online by Cambridge University Press:  09 October 2020

Prasanta Bera Open the ORCID record for Prasanta Bera [Opens in a new window]
Prasanta Bera*
Affiliation:
Mathematical Sciences and STAG Research Centre, University of Southampton, Southampton SO17 1BJ, U.K. email: [email protected]
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Abstract

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An extended magnetosphere of a strongly magnetized accreting white dwarf (known as a polar) prevents the formation of an accretion disk and the matter is channelled to the magnetic pole(s). A few such sources show quasi-periodic oscillations in their optical light curves. These high-frequency oscillations are thought to be generated from the post-shock accretion column. The kinetic energy of the accretion flow is finally emitted from this post-shock region and the involved radiation processes decide the state of the matter. Here we study the structure and the dynamical properties of such accretion columns and compare the results with the observational characteristics.

Keywords

magnetic accretionwhite dwarfmagnetic fieldaccretion column
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 15 , Symposium S357: White Dwarfs as Probes of Fundamental Physics: Tracers of Planetary, Stellar and Galactic Evolution , October 2019 , pp. 134 - 137
Copyright
© International Astronomical Union 2020

References

Bera, P. & Bhattacharya, D. 2018, MNRAS, 474, 162910.1093/mnras/stx2720CrossRefGoogle Scholar
Bonnet-Bidaud, J. M., Mouchet, M., Busschaert, C., et al. 2015, A&A, 579, A24Google Scholar
Chanmugam, G. & Wagner, R. L. 1979, ApJ, 232, 89510.1086/157352CrossRefGoogle Scholar
Hameury, J. M., Bonazzola, S., Heyvaerts, J., et al. 1983, A&A, 128, 369Google Scholar
Imamura, J. N., Steiman-Cameron, T. Y., & Wolff, M. T. 2000, PASP, 112, 1810.1086/316478CrossRefGoogle Scholar
Langer, S. H., Chanmugam, G., & Shaviv, G. 1981, ApJ, 245, L2310.1086/183514CrossRefGoogle Scholar
Middleditch, J. 1982, ApJ, 257, L7110.1086/183811CrossRefGoogle Scholar
Mignone, A. 2005, ApJ, 626, 37310.1086/429905CrossRefGoogle Scholar
Mouchet, M., Bonnet-Bidaud, J.-M., Van Box Som, L., et al. 2017, A&A, 600, A53Google Scholar