2009ApJ...691L..72D

Query : 2009ApJ...691L..72D

2009ApJ...691L..72D - Astrophys. J., 691, L72-L76 (2009/February-1)

Black hole spins of radio sources.

DALY R.A.

Abstract (from CDS):

A new approach to constraining or determining the spin of a massive black hole is proposed. A key parameter in the analysis is the dimensionless ratio, r, of the energy released to the mass of the hole. It is shown that the black hole spin j may be written as a function of the dimensionless ratio of the black hole spin energy to the black hole mass. When extraction of the black hole spin energy powers an outflow from the hole, the ratio r provides an indication of the black hole spin. The method is applied to a sample of 19 very powerful classical double radio galaxies with a range of size and redshift. The sources are found to have remarkably similar values of r and j, implying that the sources have very similar physical conditions at the time the outflow is generated. The weighted mean value of the spins is 0.12 ±0.01. A sample of 29 central dominant galaxies is also studied; most of these sources have amorphous or FRI radio structure. The sources have a broad range of ratios r, and correspondingly broad range of black hole spins j with values from about 0.001 to 0.4, and a median value of about 0.03. The broad range probably results from the fact that each source is observed at a different stage in its lifetime. The intrinsic range of parameters could be as tight as it is for the powerful classical double radio galaxies.

Abstract Copyright: ∼

Journal keyword(s): black hole physics - galaxies: active - galaxies: nuclei

Simbad objects: 55

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Number of rows : 55
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 ACO 85 ClG 00 41 36.21 -09 19 30.4           ~ 909 0
2 ACO 133 ClG 01 02 41.5 -21 52 53           ~ 368 1
3 3C 34.0 rG 01 10 18.7 +31 47 20   21       ~ 174 2
4 ACO 262 ClG 01 52 50.4 +36 08 46           ~ 699 1
5 3C 55.0 rG 01 57 10.7 +28 51 40   20.8       ~ 154 1
6 3C 68.2 rG 02 34 23.9 +31 34 17   24       ~ 138 1
7 ACO 426 ClG 03 19 47.2 +41 30 47           ~ 2258 1
8 ZwCl 0335+0956 ClG 03 38 35.3 +09 57 54           ~ 383 1
9 ACO 478 ClG 04 13 20.7 +10 28 35           ~ 502 0
10 2C 608 AGN 07 02 08.30458800 +25 13 53.5192680   20.5       ~ 121 0
11 ZwCl 0735+7421 ClG 07 41 40.3 +74 14 58     17.70     ~ 254 0
12 ClG 0745-19 ClG 07 47 31.3 -19 17 40           ~ 372 0
13 2MASX J07473129-1917403 BiC 07 47 31.3247085936 -19 17 40.013334276   19.60       ~ 409 1
14 ICRF J083454.9+553421 Sy2 08 34 54.90398776 +55 34 21.0703409   20.75 19.45 17.180   ~ 282 2
15 NAME Hya A LIN 09 18 05.66848602 -12 05 43.8060823   14.38 14.8     ~ 1012 1
16 ClG J0947+7623 ClG 09 46 59.916 +76 23 43.99           ~ 150 0
17 NVSS J094712+762312 Rad 09 47 12.5 +76 23 12           ~ 151 1
18 ZwCl 0949+5207 ClG 09 52 49.1 +51 53 05           ~ 135 0
19 3C 239 rG 10 11 45.6 +46 28 20   22.5       ~ 155 1
20 ZwCl 1021+0426 ClG 10 23 39.0 +04 11 14   15.6 17.95     ~ 283 0
21 3C 244.1 QSO 10 33 33.9860997312 +58 14 35.611906344   19.0 19.0     ~ 186 1
22 ACO 1068 ClG 10 40 47.1 +39 57 19           ~ 214 0
23 3C 247 QSO 10 58 58.8 +43 01 23   21.5       ~ 160 1
24 3C 267 rG 11 49 56.5 +12 47 19   22.5       ~ 155 2
25 M 84 Sy2 12 25 03.74333 +12 53 13.1393 12.67 12.09 10.49     ~ 1763 2
26 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7197 3
27 ACO 3526 ClG 12 48 51.8 -41 18 21           ~ 1068 2
28 HCG 62 CGG 12 53 05.6 -09 12 21           ~ 306 0
29 2C 1066 SyG 12 56 57.5 +47 20 20   22.0       ~ 281 0
30 3C 289 QSO 13 45 26.699 +49 46 31.39   23       ~ 161 1
31 ACO 1795 ClG 13 48 50.48 +26 35 07.4           ~ 1267 0
32 ACO 1835 ClG 14 01 02.07 +02 52 43.2           ~ 689 1
33 IC 4374 QSO 14 07 29.76229070 -27 01 04.2916695   13.61   11.79 12.55 ~ 138 3
34 ClG J1423+2404 ClG 14 23 47.7 +24 04 40           ~ 209 0
35 ACO 2029 ClG 15 10 56.2 +05 44 42           ~ 943 0
36 ACO 2052 ClG 15 16 41.64 +07 01 45.5           ~ 730 1
37 ACT-CL J1521.8+0742 ClG 15 21 55.14 +07 41 27.2     15.13     ~ 311 0
38 4C 55.31 rG 15 35 01.2 +55 36 49   23       ~ 124 1
39 3C 324.0 Sy1 15 49 49.2 +21 25 39   21.5       ~ 309 0
40 NAME 3C 330G2 Sy2 16 09 36.6 +65 56 43   20.33       ~ 275 1
41 ACO 2199 ClG 16 28 43.31 +39 34 07.6           ~ 1171 1
42 3C 337 QSO 16 28 53.9 +44 19 03   20.0       ~ 148 1
43 NAME Hercules A rG 16 51 07.9886687784 +04 59 35.547131472     18.25     ~ 465 1
44 3C 356 QSO 17 24 20.2 +50 57 14   21.5 21.5     ~ 224 1
45 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 14417 0
46 3C 388.0 SyG 18 44 02.3840387736 +45 33 29.628672300   16.91 15.56     ~ 325 1
47 3C 401 SyG 19 40 25.1 +60 41 35   19.1       ~ 201 1
48 4C 40.40 Rad 19 59 20.4 +40 44 20           ~ 100 0
49 NAME Cyg A Sy2 19 59 28.35656837 +40 44 02.0972325   16.22 15.10     ~ 2368 2
50 3C 427.1 rG 21 04 07.5 +76 33 10   23.3 21.1     ~ 156 1
51 3C 437 rG 21 47 25.1 +15 20 38   23       ~ 128 2
52 3C 441 rG 22 06 04.9 +29 29 20   21.0       ~ 197 3
53 ACO S 1101 ClG 23 13 58.5 -42 43 39           ~ 258 1
54 ACO 2597 ClG 23 25 19.70 -12 07 27.7           ~ 539 0
55 ACO 4059 ClG 23 57 02.2 -34 45 58           ~ 380 1

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