To the top

Page Manager: Webmaster
Last update: 9/11/2012 3:13 PM

Tell a friend about this page
Print version

Spectral signature of osc… - University of Gothenburg, Sweden Till startsida
To content Read more about how we use cookies on

Spectral signature of oscillating slender tori surrounding Kerr black holes

Journal article
Authors F. H. Vincent
G. P. Mazur
O. Straub
Marek A Abramowicz
W. Kluzniak
G. Torok
P. Bakala
Published in Astronomy & Astrophysics
Volume 563
ISSN 0004-6361
Publication year 2014
Published at Department of Physics (GU)
Language en
Keywords accretion, accretion disks, black hole physics, relativistic processes, QUASI-PERIODIC OSCILLATIONS, X-RAY BINARIES, DISKOSEISMOLOGY, DISKS
Subject categories Astronomy


Context. Some microquasars exhibit millisecond quasi-periodic oscillations (QPO) that are most probably related to phenomena occuring in the immediate vicinity of central black holes. Oscillations of accretion tori have been proposed to model these QPOs. Aims. Here, we aim at determining the observable spectral signature of slender accretion tori surrounding Kerr black holes. We analyse the impact of the inclination and spin parameters on the power spectra. Methods. Ray-traced power spectra of slender tori oscillation modes are computed in the Kerr metric. Results. We show that the power spectral densities of oscillating tori are very sensitive to the inclination and spin parameters. This strong dependency of the temporal spectra on inclination and spin may lead to observable constraints of these parameters. Conclusions. This work goes a step further in the analysis of the oscillating torus QPO model. It is part of a long-term study that will ultimately lead to comparison with observed data.

Page Manager: Webmaster|Last update: 9/11/2012

The University of Gothenburg uses cookies to provide you with the best possible user experience. By continuing on this website, you approve of our use of cookies.  What are cookies?