APT1 - Observations of Astrophysical Black Holes |
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Speaker |
Lai, Dong |
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Talk Title |
Excitation of Diskoseismic Oscillations in Black-Hole Accretion Disks: Super-reflection, Corotation Amplifier and QPOs |
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Abstract |
I will discuss recent works on the wave dynamics of accretion disk around a black hole, focusing on global disk instabilities and (inertial-acoustic) wave modes trapped in the inner disk region. I will explain the role of wave super-reflection and corotation amplifier, as well as how general relativistic effects help to drive these modes overstable. Applications to the quasi-periodic oscillations obsereved in accreting black hole systems (X-ray binaries and AGNs) will also be discussed. |
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