A possible 3:2 orbital epicyclic resonance in QPOs frequencies of Sgr A*

Details A possible 3:2 orbital epicyclic resonance in QPOs frequencies of Sgr A* A possible 3:2 orbital epicyclic resonance in QPOs frequencies of Sgr A*

2004-12-18

arxiv.org/abs/astro-ph/0412500v1

Astronomy and Astrophysics

Astrophysics

5 pages, 3 tables and 4 figures (2x2); submitted to A&A

Scientific paper

10.1051/0004-6361:20042558

A recent measurement of double peak QPOs frequencies in Sgr A* is consistent with the 3:2 ratio. The same ratio is firmly established by previous observations in all double peak kHz QPOs in microquasars and theoretically explained by orbital epicyclic resonances excited in nearly Keplerian accretion flow in black hole's strong gravity. If confirmed, the 3:2 ratio of double peak QPOs in Sgr A$^*$ will be of a fundamental importance for the black hole accretion theory, by providing another clear argument that the accretion disk oscillations are indeed governed by non-linear, strong-gravity physics.

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