Twin peak QPOs frequencies in microquasars and Sgr A The resonance and other orbital models

Marek Abramowicz; W. Kluźniak; Zdeněk Stuchlík; Gabriel Török

Twin peak QPOs frequencies in microquasars and Sgr A The resonance and other orbital models
Paper in proceeding, 2004

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.

LMXRB and Galactic Centre black holes

theory

observations

X-ray variability

Author

Marek Abramowicz

University Of Leicester

Silesian University Opava

University of Gothenburg

Other publications Research

W. Kluźniak

University of Zielona Góra

University Of Leicester

Polish Academy of Sciences

Zdeněk Stuchlík

Silesian University Opava

Gabriel Török

University Of Leicester

Silesian University Opava

Proceedings of RAGtime

23365668 (ISSN) 23365676 (eISSN)

1-23
8072482424 (ISBN)

RAGtime 4/5: Workshops on Black Holes and Neutron Stars
Opava, Czech Republic,

Subject Categories (SSIF 2011)

Astronomy, Astrophysics and Cosmology

More information

Latest update

8/21/2026

Twin peak QPOs frequencies in microquasars and Sgr A The resonance and other orbital models Paper in proceeding, 2004

Author

Marek Abramowicz

W. Kluźniak

Zdeněk Stuchlík

Gabriel Török

Proceedings of RAGtime

Subject Categories (SSIF 2011)

More information

Latest update

Twin peak QPOs frequencies in microquasars and Sgr A The resonance and other orbital models
Paper in proceeding, 2004