Volume 440, Number 1, September II 2005
|Page(s)||1 - 4|
|Published online||19 August 2005|
A possible 3:2 orbital epicyclic resonance in QPO frequencies of Sgr A*
Nordita, Blegdamsvej 17, 2100 Copenhagen, Denmark
2 Department of Astrophysics, Göteborg University & Theoretical Physics, Chalmers University, 412-96 Göteborg, Sweden
3 Institute of Physics, Faculty of Philosophy and Science, Silesian University in Opava, Bezručovo Nám. 13, 746 01 Opava, Czech Republic e-mail: firstname.lastname@example.org
Accepted: 7 May 2005
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 peaked kHz QPOs in microquasars and theoretically explained by orbital epicyclic resonances excited in nearly Keplerian accretion flow in a 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.
Key words: black hole physics / X-rays: individuals: Sgr A
© ESO, 2005
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.