Torus oscillations and the 17 minute QPO (IR flares in Sgr A* ) Wod - - PowerPoint PPT Presentation

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Nov 14, 2023 146 likes •381 views

Torus oscillations and the 17 minute QPO (IR flares in Sgr A* ) Wod ek Kluniak Copernicus Astronomical Center Aspen 2016.02.09 Sgr A* Genzel et al 2003 17m QPO Appearance of black hole and disk (light-bending) J.-A. Marck Size of BH

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Torus oscillations and the 17 minute QPO

(IR flares in Sgr A*)

Włodek Kluźniak

Copernicus Astronomical Center

Aspen 2016.02.09

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Sgr A* Genzel et al 2003 17m QPO

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Appearance of black hole and disk (light-bending)

J.-A. Marck

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Size of BH binaries

J. Orosz

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Black hole GRO J 1655-40 X-ray observations Strohmayer et al 2001 450:300=3:2 Kluźniak & Abramowicz 2001 Twin high-frequency quasi-periodic oscillations HF QPOs

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In GR, f~1/M

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e.g., WK 2005

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B. Mishra

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M. Bursa

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Bursa et al. 2004

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2006

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Parthasarathy,Manousakis, WK, 2016 in press

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Mishra + 2016

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Blaes et al 2006

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vertical lines: Radial, Vertical, +, X, Breathing PDS

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17 minute QPO likely a counterpart of HF QPO in binary BH (450 Hz in GRO 1655-40) HF QPOs present in PDS of ray-traced GR simulations of tori. The modes have been identified. Which modes are present depends on the perturbation type. Radial perturbations yield two modes (R, +) in ~ 3:2 ratio Ditto for vertical perturbations (V, B) but only one pair ever seen in a given binary BH (to date?)

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F. Vincent

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