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QPOs expected in rotating accretion flows around a supermassive black hole

Published online by Cambridge University Press:  01 August 2006

T. Okuda ,
V. Teresi  and
D. Molteni
T. Okuda
Affiliation:
Hokkaido University of Education, Hachiman-Cho 1-2, 040-0429 Hakodate, Japan email: okuda@cc.hokkyodai.ac.jp
V. Teresi
Affiliation:
Dipartimento di Fisica e Tecnologie Relative, Università di Palermo, Viale delle Scienza, 90128 Palermo, Italymolteni@unipa.it
D. Molteni
Affiliation:
Dipartimento di Fisica e Tecnologie Relative, Università di Palermo, Viale delle Scienza, 90128 Palermo, Italymolteni@unipa.it
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Abstract

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It is well known that rotating inviscid accretion flows with adequate injection parameters around black holes could form shock waves close to the black holes, after the flow passes through the outer sonic point and can be virtually stopped by the centrifugal force. We numerically examine such shock waves in 2D accretion flows with 10−5 to 106 Eddington critical accretion rates around a supermassive black hole with 106M⊙. As the results, the luminosities show QPO phenomena with modulations of a factor 2–3 and with quasi-periods of a few to several hours.

Keywords

Accretionaccretion disks – black hole physics – galaxies: active – hydrodynamics – radiation mechanisms: thermal – shock waves
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S238: Black Holes from Stars to Galaxies – Across the Range of Masses , August 2006 , pp. 423 - 424
Copyright
Copyright © International Astronomical Union 2007

References

Fukue, J. 1987, PASJ, 39, 309Google Scholar
Chakrabarti, S. K. 1989, ApJ, 347, 365Google Scholar
Abramowicz, M. A. & Chakrabarti, S. K. 1990, ApJ, 350, 281CrossRefGoogle Scholar
Chakrabarti, S. K. & Molteni, D. 1993, ApJ, 417, 671CrossRefGoogle Scholar
Molteni, D., Sponholz, H. & Chakrabati, S. K. 1996, ApJ, 457, 805CrossRefGoogle Scholar
Ryu, D., Chakrabarti, S. K. & Molteni, D. 1997, ApJ, 474, 378Google Scholar
Lanzafame, G., Molteni, D. & Chakrabarti, S. K. 1998,MNRAS, 299, 799Google Scholar
Okuda, T., Teresi, V. & Molteni, D. 2004, PASJ, 56, 547Google Scholar
Chakrabarti, S. K., Acharyya, K. & Molteni, D. 2004, A&A, 421, 1Google Scholar