Super-Eddington quasars: what do they look like?

Invited talk at the Young Astronomers on Galactic Nuclei 2017 meeting (YAGN17), held in Teruel (Spain) on 23-25 October 2017.

Transcript

1. Super-Eddington quasars: what do they look like? Tullia Sbarrato
 Università degli Studi di Milano - Bicocca
2. High-z quasars tracers of the first supermassive black holes non-jetted jetted 173 quasars known at z>5.7 (Banados+2016) YAGN17 — Teruel, 23 October 2017 8 blazars known at z>4 (Sbarrato+2012,2013,2015) ~2700 misaligned jetted sources
3. Why blazars? ✓b = 1/ ✓v ✓v < 1/ 2 2 ⇠ 340 450 viewing angle: analogous jetted AGN, randomly oriented: YAGN17 — Teruel, 23 October 2017
4. Why blazars? ✓b = 1/ ✓v ✓v < 1/ 2 2 ⇠ 340 450 viewing angle: analogous jetted AGN, randomly oriented: YAGN17 — Teruel, 23 October 2017
5. Ghisellini et al. 2014 UCMB / (1 + z)4 radio emission is quenched! Ghisellini & TS, 2016 optical emission is over-obscured! YAGN17 — Teruel, 23 October 2017 Why blazars?
6. Ghisellini et al. 2014 UCMB / (1 + z)4 radio emission is quenched! Ghisellini & TS, 2016 optical emission is over-obscured! YAGN17 — Teruel, 23 October 2017 Why blazars? ULAS J1120+0641 z=7.1 Barnett et al. 2015
7. High masses at high redshifts YAGN17 — Teruel, 23 October 2017
8. Ld = ⌘d ˙ Mc2 ⌘ = ⌘d + ⌘B Formation time-scales YAGN17 — Teruel, 23 October 2017
9. Standard accreting disc YAGN17 — Teruel, 23 October 2017 temperature temperature Ld = ⌘d ˙ Mc2 Ld = ⌘d ˙ Mc2 Log ✓ MBH M ◆ = 8 . 5 Log Ld = 46 . 1 Shakura & Sunyaev 1973
10. Super-Eddington accreting disc YAGN17 — Teruel, 23 October 2017 temperature temperature Rpt Rpt = 3 2 ˙ M ˙ MEdd Rgh photon trapping radius: Ohsuga et al. 2002
11. Super-Eddington accreting disc YAGN17 — Teruel, 23 October 2017 13.5 14.0 14.5 15.0 15.5 16.0 Log ⌫ [Hz, rest-frame] 44.0 44.5 45.0 45.5 46.0 46.5 Log ⌫L⌫ [erg/s] all models: i=30deg, eta=0.083 ph-trap: LogM=8.5, Ledd, Rin=12Rs SS73: LogM=8.5, Ledd, Rin=3Rs
12. Super-Eddington accreting disc YAGN17 — Teruel, 23 October 2017 2 1 10 9 3 4 5 6 7 8
13. Super-Eddington accreting disc YAGN17 — Teruel, 23 October 2017
14. Super-Eddington accreting disc? YAGN17 — Teruel, 23 October 2017 SDSS 0100+2802 z=6.3 Log Ld = 47 . 65 MBH = 1010M SS73 best fit MBH ⇠ (1.05 1.47) ⇥ 1010M Log Ld ⇠ 47 . 86 48 . 03 tentative ph-trap Wu et al. 2014
15. Super-Eddington accreting disc? YAGN17 — Teruel, 23 October 2017 SDSS 0100+2802 z=6.3 Log Ld = 47 . 65 MBH = 1010M SS73 best fit MBH ⇠ (1.05 1.47) ⇥ 1010M Log Ld ⇠ 47 . 86 48 . 03 tentative ph-trap Question: why emission lines are as broad as standard? Wu et al. 2014
16. Conclusions YAGN17 — Teruel, 23 October 2017 we observe lots of extremely massive black holes in the early Universe most of them seem to host a jet! they need to accrete extremely fast they do not look like Super-Eddington! … but…