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Simulations of flux variability of oscillating accretion fluid tori around Kerr black holes

Published online by Cambridge University Press:  24 March 2015

Pavel Bakala ,
Kateřina Goluchová ,
Eva Šrámková ,
Andrea Kotrlová ,
Gabriel Török ,
Frederic H. Vincent  and
Marek A. Abramowicz
Pavel Bakala
Affiliation:
Institute of Physics, Faculty of Philosophy and Science, Silesian University in Opava, Bezručovo nám. 13, Opava, Czech Republic e-mail: [email protected]
Kateřina Goluchová
Affiliation:
Institute of Physics, Faculty of Philosophy and Science, Silesian University in Opava, Bezručovo nám. 13, Opava, Czech Republic e-mail: [email protected]
Eva Šrámková
Affiliation:
Institute of Physics, Faculty of Philosophy and Science, Silesian University in Opava, Bezručovo nám. 13, Opava, Czech Republic e-mail: [email protected]
Andrea Kotrlová
Affiliation:
Institute of Physics, Faculty of Philosophy and Science, Silesian University in Opava, Bezručovo nám. 13, Opava, Czech Republic e-mail: [email protected]
Gabriel Török
Affiliation:
Institute of Physics, Faculty of Philosophy and Science, Silesian University in Opava, Bezručovo nám. 13, Opava, Czech Republic e-mail: [email protected]
Frederic H. Vincent
Affiliation:
Nicolaus Copernicus Astronomical Center, Warszawa, Poland
Marek A. Abramowicz
Affiliation:
Institute of Physics, Faculty of Philosophy and Science, Silesian University in Opava, Bezručovo nám. 13, Opava, Czech Republic e-mail: [email protected]
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Abstract

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High frequency quasi-periodic oscillations (HF QPOs) are observed in the X-ray power-density spectra (PDS) of several microquasars and low mass X-ray binaries. Many proposed QPO models are based on oscillations of accretion toroidal fluid structures orbiting in the vicinity of a compact object. We study oscillating accretion tori orbiting in the vicinity of a Kerr black hole. We demonstrate that significant variation of the observed flux can be caused by the combination of radial and vertical oscillation modes of a slender, polytropic, perfect fluid, non-self-graviting torus with constant specific angular momentum. We investigate two combinations of the oscillating modes corresponding to the direct resonance QPO model and the modified relativistic precession QPO model.

Keywords

X-rays: binariesstars: neutronblack hole physicsaccretionaccretion disks
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 10 , Issue S313: Extragalactic jets from every angle , September 2014 , pp. 380 - 381
Copyright
Copyright © International Astronomical Union 2015 

References

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