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The orbital resonance model for twin peak kHz QPOs | | Marek A. Abramowicz
; Wlodek Kluzniak
; Zdenek Stuchlik
; Gabriel Torok
; | | Date: |
22 Dec 2003 | | Subject: | astro-ph | | Abstract: | Many Galactic black hole and neutron star sources in low X-ray mass binaries show QPOs (quasi periodic oscillations) in their observed X-ray fluxes, i.e. peaks in the Fourier variability power spectra. Pairs of twin peaks are observed, and in black-hole systems their frequencies (upp), (down) are in rational ratios. For example, in all four microquasars with twin peaks observed, (upp):(down) = 3:2. The rational ratios have been postulated in a model that explained twin peak QPOs as a non-linear resonance between modes of accretion disk oscillations. For those microquasars where the mass of the X-ray source is known, we determine the black-hole spin, following from the observed QPO frequencies within various models of resonance. | | Source: | arXiv, astro-ph/0401464 | | Services: | Forum | Review | PDF | Favorites | |
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