Workshop: Gas Dynamics and Star Formation in the Extreme Environment of Galactic Nuclei, Ringberg

Session

Accretion physics (radiatively efficient and inefficient)

21 Mar 2013, 16:35

Ringberg

Conveners

Accretion physics (radiatively efficient and inefficient)

• Moshe Elitzur (University of Kentucky)

Accretion physics (radiatively efficient and inefficient)

• Moshe Elitzur

40. The Galactic Centre Forecast (H)

Monika Moscibrodzka (Department of Astrophysics, Radboud University Nijmegen)

21/03/2013, 16:35

Highlight

I will present highlights of numerical simulations of gas falling onto a black hole in the center of the Milky Way. Our models predicts dynamical and radiative properties of a hot accretion flows around a Kerr black hole. I will show how the Sgr A* observational data put constraints on the model parameters such as viewing angle, spin of the black hole or mass accretion rate. Since there is a...

41. Simulating SMBH accretion: spherical flow to cold clumps and hot bubbles

Paramita Barai (INAF - Osservatorio Astronomico di Trieste)

21/03/2013, 17:05

Talk

I will report our investigation of gas accretion and radiative feedback in the SMBH of active galaxies (Barai, Proga & Nagamine 2011, 2012). We perform simulations using the 3D SPH code Gadget-3, without and with radiative heating by the central X-ray source and cooling. We find that the accretion mode depends on the X-ray luminosity (L_X). At low-L_X, gas accretes in a stable,...

42. AGN transients from accreting SMBH binaries

Takamitsu Tanaka (MPA Garching)

22/03/2013, 09:00

Talk

Supermassive black hole binaries are inevitable byproducts of hierarchical structure formation. I will discuss several variable electromagnetic emission signatures predicted for such binaries when they accrete as luminous active galactic nuclei, including a class of transients that may masquerade as tidal disruption events. The predicted variable signatures should be observed by forthcoming...