Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/1988
Title: Cyclotron emission from accretion plasma columns in magnetic cataclysmic variable stars
Authors: Kalomeni, Belinda
Pekünlü, Esat Rennan
Yakut, Kadri
Kalomeni, Belinda
Izmir Institute of Technology. Physics
Keywords: Astronomy
Cyclotrons
Magnetic fields
Plasmas
White dwarfs
Galaxies
Issue Date: Sep-2005
Publisher: EDP Sciences
Source: Kalomeni, B., Pekünlü, E.R., and Yakut, K. (2005). Cyclotron emission from accretion plasma columns in magnetic cataclysmic variable stars. Astronomy and Astrophysics, 439(3), 823-833. doi:10.1051/0004-6361:20041780
Abstract: Pure cyclotron spectra of polars produced during their low accretion states are deduced. We used the working hypothesis that the cyclotron emission is produced by electrons spiraling down the dipole magnetic field lines and forming an accretion plasma column on top of the magnetic pole of a white dwarf. The velocity distribution function of electrons emitting cyclotron radiation is assumed to be a bi-Maxwellian. Since the radiating electrons in a million-Gauss magnetic field seek their respective magnetic mirrors, the perpendicular components of their velocity vectors are assumed to be greater than the parallel ones in the radiation region. This assumption implies that the cyclotron radiation is emitted more or less in the perpendicular direction (to the local magnetic field). Then we investigated the contribution of the ordinary and the extraordinary wave modes to the luminosity. The model predictions seem to be consistent with observations. We present the model cyclotron spectra of a randomly chosen polar, UZ For, as a case study.
URI: http://doi.org/10.1051/0004-6361:20041780
http://hdl.handle.net/11147/1988
ISSN: 0004-6361
0004-6361
1432-0746
Appears in Collections:Physics / Fizik
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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