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

Session

Origin and growth of SMBH

21 Mar 2013, 14:00

Ringberg

Conveners

Origin and growth of SMBH

• Jens Thomas (MPE)

Origin and growth of SMBH

• Jens Thomas (MPE)

36. Cosmological Growth of SMBH (R)

Dr Andrea Merloni (MPE)

21/03/2013, 14:00

Review

How did supermassive black holes form and grow in the nuclei of galaxies? Why are their physical properties today so tightly linked to those of their hosts? What was the impact on the surrounding structures of the copious energy release, either in radiative or mechanical form, associated to the growth of such black holes in active galactic nuclei (AGN)? I will show how constraints available...

37. The anti-hierarchical growth of black holes (H)

Dr Michaela Hirschmann (Osservatorio Astronomico di Trieste INAF)

21/03/2013, 14:45

Highlight

Observational studies have revealed a “downsizing” trend in black hole (BH) growth: the number densities of luminous AGN peak at higher redshifts than those of faint AGN. This would seem to imply that massive black holes formed before low mass black holes, in apparent contradiction to hierarchical clustering scenarios. We investigate whether this observed “downsizing” in BH growth is...

38. Why should we care about direct collapse black holes?

Bhaskar Agarwal (MPE)

21/03/2013, 15:45

Talk

I will speak about an unconventional way of forming massive seed black holes (BHs) where pristine gas in the early universe is able to withstand fragmentation into stars, owing to a high level of extragalactic Lyman-Werner radiation, and directly collapses into a BH with mass 1.e4-1.e5 Msol. If these BHs can form and exist at z>6, there would be some interesting implications on the...

39. Turbulence during the formation of SMBH

Muhammad Latif (Institute for Astrophysics, Göttingen)

21/03/2013, 16:10

Talk

The existence of supermassive black holes is confirmed at z 6. We explore their formation in the early universe performing high resolution cosmological simulations. We employ the highest resolution per Jeans length to date, allowing us to model turbulence on resolved scales, and in addition employ a subgrid scale model for turbulence on unresolved scales. Our findings show that fragmentation...