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Global MHD instabilities: from Low Frequency to High Frequency QPOs, and to Sgr A

Abstract : I review recent work that goes beyond our model for the Low-Frequency Quasi-Periodic Oscillation of microquasars, based on the Accretion-Ejection Instability. I show that similar instabilities, which can be viewed as strongly unstable versions of the diskoseismologic modes, provide explanations for both the High-Frequency QPO and for the quasi-periodicity observed durng the flares of Sgr A*, the supermassive black hole at the Galactic Center.
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http://hal.in2p3.fr/in2p3-00130171
Contributor : Simone Lantz <>
Submitted on : Friday, February 9, 2007 - 3:40:45 PM
Last modification on : Wednesday, October 21, 2020 - 4:32:14 PM

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Michel Tagger. Global MHD instabilities: from Low Frequency to High Frequency QPOs, and to Sgr A. 6th Microquasar Workshop: Microquasars and Beyond, Sep 2006, Como, Italy. pp.PoS(MQW6)031. ⟨in2p3-00130171⟩

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