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

Session

The gas and dust distribution close to SMBH (torus and BLR)

19 Mar 2013, 11:10

Ringberg

Conveners

The gas and dust distribution close to SMBH (torus and BLR)

• Richard Davies (MPE)

The gas and dust distribution close to SMBH (torus and BLR)

• Richard Davies (MPE)

16. The AGN torus and Broad Line Region (R)

Moshe Elitzur (University of Kentucky)

19/03/2013, 11:10

Review

Instead of a toroidal hydrostatic structure, disk outflow too can explain AGN obscuration. A central component of star formation, such outflows unify naturally many AGN observations, including broad line emission. Disk winds predict that both the torus and BLR disappear at low black-hole accretion rates, as observed. Recent observations reveal two stages in the broad line disappearance. In...

17. Interferometric observations of the torus in the Circinus galaxy (H)

Konrad Tristram (MPIfR)

19/03/2013, 11:55

Highlight

With interferometry in the infrared it is possible to directly resolve the thermal emission from the dusty torus in Active Galactic Nuclei. We can hence for the first time directly investigate the accreting material on parsec scales and test the unified scheme of AGN. The Circinus galaxy is ideal target for interferometric studies of its AGN-heated dust distribution, because it is the...

18. The MIDI AGN Large Program: the largest sample of resolved AGN tori

Leonard Burtscher (MPE)

19/03/2013, 14:00

Talk

Interferometric observations with MIDI/VLTI in the mid-infrared made studies of the central dusty tori of Active Galactic Nuclei (AGNs) possible and proved their existence in a few nearby galaxies. In an effort to enhance the existing sample to a number that would allow statistical questions to be asked, we have now completed a MIDI Large Programme comprising 16 nights of VLTI/UT time. The...

19. The disappearance of the torus at low luminosities

Almudena Prieto (IAC)

19/03/2013, 14:25

Talk

Low luminosity agns (LLAGNs) are posing a problem to the standard accretion AGN scenario because of their low radiation efficiency and the absence in their spectrum of the most significative feature of an accretion-disk: the blue bump. I will present results from high angular resolution observations in the IR of a set of prototype LLAGN which show that two other key features of AGN...

20. Simulations of warped megamaser disks in Galactic Nuclei

Ayse Ulubay-Siddiki (Istanbul University)

19/03/2013, 14:50

Talk

Warped megamaser discs in galactic nuclei provide a useful means of probing the close vicinity of the central black holes. The observations of some of the systems in nearby AGN, such as NGC1068 and Circinus, might be indicating the existence of a highly inclined, massive disc, prone to forming stars. We study for various surface density profiles, and disc radial extents, the long term...