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Title:
Tidal Disruption of Small Satellites Orbiting Black Holes
Authors:
Germanà, C.; Kostić, U.; Čadež, A.; Calvani, M.
Affiliation:
AA(Department of Astronomy, University of Padua, Vicolo dell'Osservatorio 2, 35122 Padova, Italy; INAF-Astronomical Observatory of Padova, Vicolo dell'Osservatorio 5, 35122 Padova, Italy), AB(Faculty of Mathematics and Physics, University of Ljubljana, Jadranska 19, 1000 Ljubljana, Slovenia), AC(Faculty of Mathematics and Physics, University of Ljubljana, Jadranska 19, 1000 Ljubljana, Slovenia), AD(INAF-Astronomical Observatory of Padova, Vicolo dell'Osservatorio 5, 35122 Padova, Italy)
Publication:
SIMBOL-X: FOCUSING ON THE HARD X-RAY UNIVERSE: Proceedings of the 2nd International Simbol-X Symposium. AIP Conference Proceedings, Volume 1126, pp. 367-369 (2009). (AIPC Homepage)
Publication Date:
05/2009
Origin:
AIP
PACS Keywords:
Galactic nuclei , circumnuclear matter, and bulges, Lunar, planetary, and deep-space probes, Galaxy mergers, collisions, and tidal interactions, X-ray binaries, Infall, accretion, and accretion disks
DOI:
10.1063/1.3149456
Bibliographic Code:
2009AIPC.1126..367G

Abstract

Low Mass X-ray Binaries (LMXBs) with either a black hole or a neutron star show power spectra characterised by Quasi Periodic Oscillations (QPOs). Twin peak high frequency QPOs are characterised by frequencies that are typical for matter orbiting within 10 rg from the compact object. We consider clumps of material orbiting a Schwarzschild black hole, that are deformed by tidal interaction. We present some preliminary calculations of corresponding light curves and power spectra. We were able to fit the simulated power spectra with the high frequency part of the power spectra observed in the LMXB XTE J1550-564 containing a black hole. Our numerical simulations reproduce the twin high frequency QPOs and the power-law. The lower peak corresponds to the Keplerian frequency, the upper one to the sum of the Keplerian and the radial frequency.
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