The problematic existence of massive black holes in the early Universe

16 Oct 2023, 15:00 → 20 Oct 2023, 13:00 Europe/Rome

IFPU

Observations show that 6 < z < 7.5 quasars are powered by super massive black holes (SMBHs, MBH ≥1.e9 Msun), whose formation is one of the biggest mysteries for current theoretical and observational cosmology. The most recent JWST observations have revealed the presence of intermediate massive black holes (IMBHs, MBH ~1.e6-1.e7 Msun) in galaxies at even higher redshifts (z~10-11) than currently known quasars. Models suggest that SMBHs grow through gas accretion onto massive seeds, the so-called “direct collapse black holes” (DCBHs, MBH ≥ 1.e5 Msun). The growth of such massive black holes is regulated by feedback processes that may quench their host galaxy's star formation and reduce the gas accretion efficiency. The motivation for this focus week is to bring together different communities that investigate the physical properties of early massive black holes both from the observational and theoretical point of view to trigger new ideas and solutions about the problematic existence of massive black holes at high redshift.   

Monday, 16 October

1 Why are we here? The IFPU program

Speaker: Simona Gallerani

2 The Big-z PRIN

Speaker: Fabrizio Fiore

3 Brain-sailing

Ideas, suggestions, topics of discussion for the workshop

Tuesday, 17 October

4 XQR-30: status of the project and future development

Speaker: Valentina D'Odorico

5 The dust properties and SFR in the first massive galaxies hosting quasars: state of the art and how to move forward

Speaker: Chiara Feruglio

10:30 Coffee break

6 Cold gas and dust properties of QSO host galaxies at the EoR through ALMA looking glass

Speaker: Roberta Tripodi

7 Quasar-driven outflows in the early Universe

Speaker: Manuela Bischetti

12:30 Lunch break

8 Brainstorming (Chair: Feruglio, Tripodi)

Wednesday, 18 October

9 Comparison between OBS & SIMS: where do we stand?

Speaker: Simona Gallerani

10 Early black holes unveiled by JWST/NIRSpec surveys

Speaker: Stefano Carniani

10:30 Coffee break

11 Super-early galaxies seen by JWST. Massive stars or baby black holes?

Speaker: Andrea Ferrara

12 Dust attenuation law in early galaxies detected by JWST

Speaker: Vladan Markov

12:30 Lunch break

13 Brainstorming (Chair: Carniani, Bischetti)

Thursday, 19 October

14 SMBH growth and feedback in cosmological simulations

Speaker: Milena Valentini

15 Blowouts in the early Universe: Outflows from the first SMBHs

Speaker: Paramita Barai

10:30 Coffee break

16 On the super-accreting massive BH in Gnz-11

Speaker: Maulik Bhatt

17 Tracing Supermassive Black Holes in cosmological simulations

Speaker: Alice Damiano

12:30 Lunch break

18 Brainstorming (Chair: Valentini, Barai)

Friday, 20 October

19 Concluding remarks and open discussion (D’Odorico, Ferrara)