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- Abramowicz, Marek, 1945, et al.
(författare)
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Twin peak QPOs frequencies in microquasars and Sgr A The resonance and other orbital models
- 2004
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Ingår i: Proceedings of RAGtime. - 2336-5676 .- 2336-5668. ; , s. 1-23
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Konferensbidrag (refereegranskat)abstract
- In all four microquasars which show twin peak kHz QPOs, the ratio of the two frequencies is 3:2. This rather strongly supports the suggestion by [Abramowicz and Kluźniak, 2001] that twin peak kHz QPOs are due to a resonance between some modes of accretion disk oscillations. Detailed studies of this suggestion revealed that several such non-linear resonances are present in nearly Keplerian disks in strong gravity. Here, we fit to observations predictions of the resonance hypothesis for two particular types of non-linear resonances between vertical and radial epicyclic frequencies. For three microquasars with known masses, the fits give an accurate estimate of the spin.
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