2011ApJ...727...39M


C.D.S. - SIMBAD4 rel 1.7 - 2021.05.15CEST23:21:29

2011ApJ...727...39M - Astrophys. J., 727, 39 (2011/January-3)

Are radio active galactic nuclei powered by accretion or black hole spin?

McNAMARA B.R., ROHANIZADEGAN M. and NULSEN P.E.J.

Abstract (from CDS):

We compare accretion and black hole spin as potential energy sources for outbursts from active galactic nuclei (AGNs) in brightest cluster galaxies (BCGs). Based on our adopted spin model, we find that the distribution of AGN power estimated from X-ray cavities is consistent with a broad range of both spin parameters and accretion rates. Sufficient quantities of molecular gas are available in most BCGs to power their AGNs by accretion alone. However, we find no correlation between AGN power and molecular gas mass over the range of jet power considered here. For a given AGN power, the BCG's gas mass and accretion efficiency, defined as the fraction of the available cold molecular gas that is required to power the AGN, both vary by more than two orders of magnitude. Most of the molecular gas in BCGs is apparently consumed by star formation or is driven out of the nucleus by the AGN before it reaches the nuclear black hole. Bondi accretion from hot atmospheres is generally unable to fuel powerful AGNs, unless their black holes are more massive than their bulge luminosities imply. We identify several powerful AGNs that reside in relatively gas-poor galaxies, indicating an unusually efficient mode of accretion, or that their AGNs are powered by another mechanism. If these systems are powered primarily by black hole spin rather than by accretion, spin must also be tapped efficiently in some systems, i.e.,, or their black hole masses must be substantially larger than the values implied by their bulge luminosities. We constrain the (model-dependent) accretion rate at the transition from radiatively inefficient to radiatively efficient accretion flows to be a few percent of the Eddington rate, a value that is consistent with other estimates.

Abstract Copyright:

Journal keyword(s): galaxies: active - galaxies: clusters: general - galaxies: jets - galaxies: nuclei - X-rays: galaxies: clusters

Simbad objects: 35

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Number of rows : 35

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 ACO 85 ClG 00 41 37.8 -09 20 33           ~ 813 0
2 ACO 133 ClG 01 02 39.0 -21 57 15           ~ 346 1
3 ACO 262 ClG 01 52 50.4 +36 08 46           ~ 661 1
4 ACO 426 ClG 03 19 47.2 +41 30 47           ~ 2009 1
5 ZwCl 0335+0956 ClG 03 38 35.3 +09 57 54           ~ 353 1
6 ACO 478 ClG 04 13 20.7 +10 28 35           ~ 477 0
7 ZwCl 0735+7421 ClG 07 41 40.3 +74 14 58     17.70     ~ 225 0
8 2MASX J07473129-1917403 BiC 07 47 31.296 -19 17 40.34   19.60       ~ 397 1
9 ClG 0745-19 ClG 07 47 31.3 -19 17 40           ~ 366 0
10 ICRF J083454.9+553421 Sy2 08 34 54.90395243 +55 34 21.0703658   20.75 19.45 17.180   ~ 260 2
11 NAME HYA SUPERCL SCG 08 57.9 +03 10           ~ 156 0
12 NAME Hya A LIN 09 18 05.651 -12 05 43.99   14.38 14.8     ~ 930 1
13 ZwCl 0949+5207 ClG 09 52 49.1 +51 53 05           ~ 118 0
14 ZwCl 1021+0426 ClG 10 23 39.0 +04 11 14   15.6       ~ 262 0
15 ACO 1068 ClG 10 40 47.1 +39 57 19           ~ 191 0
16 M 84 Sy2 12 25 03.74333 +12 53 13.1393 12.67 12.09 10.49     ~ 1672 2
17 M 87 BiC 12 30 49.42338230 +12 23 28.0438581 10.16 9.59 8.63   7.49 ~ 6406 3
18 ACO 3526 ClG 12 48 51.8 -41 18 21           ~ 999 2
19 HCG 62 CGG 12 53 05.6 -09 12 21           ~ 296 0
20 ACO 1664 ClG 13 03 42.4 -24 14 44           ~ 116 0
21 ACO 1795 ClG 13 49 00.5 +26 35 07           ~ 1184 0
22 ACO 1835 ClG 14 01 02.07 +02 52 43.2           ~ 642 1
23 IC 4374 QSO 14 07 29.7622884 -27 01 04.292258   13.61   11.79   ~ 125 3
24 ACO 2029 ClG 15 10 58.7 +05 45 42           ~ 879 0
25 ACO 2052 ClG 15 16 45.5 +07 00 01           ~ 690 1
26 NAME NGC 5920 Group ClG 15 21 50.7 +07 42 18     15.13     ~ 292 0
27 ACO 2151 ClG 16 05 15.0 +17 44 55           ~ 561 3
28 ACO 2199 ClG 16 28 37.0 +39 31 28           ~ 1120 1
29 NAME Hercules A BiC 16 51 08.024 +04 59 34.91     18.25     ~ 438 1
30 3C 388.0 SyG 18 44 02.417 +45 33 29.81   16.91 15.56     ~ 310 1
31 3C 401 SyG 19 40 25.2 +60 41 34   19.1       ~ 195 1
32 NAME Cyg A Sy2 19 59 28.35645829 +40 44 02.0966496   16.22 15.10     ~ 2168 2
33 ACO S 1101 ClG 23 13 58.5 -42 43 39           ~ 240 1
34 ACO 2597 ClG 23 25 19.70 -12 07 27.7           ~ 504 0
35 ACO 4059 ClG 23 56 40.7 -34 40 18           ~ 359 1

    Equat.    Gal    SGal    Ecl

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2021.05.15-23:21:29

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