2011ApJ...735...50W

Query : 2011ApJ...735...50W

2011ApJ...735...50W - Astrophys. J., 735, 50 (2011/July-1)

Evidence for rapidly rotating black holes in fanaroff-riley I radio galaxies.

WU Q., CAO X. and WANG D.-X.

Abstract (from CDS):

We investigate the correlation between 151 MHz radio luminosity, L_151 MHz_, and jet power, Pjet, for a sample of low-power radio galaxies, of which the jet power is estimated from X-ray cavities. The jet power for a sample of Fanaroff-Riley I radio galaxies (FR Is) is estimated with the derived empirical correlation. We find that Pjet/LEdd is positively correlated with L_X^{2–10 {keV}}/L_Edd for FR Is, where LEdd is the Eddington luminosity and L ^2-10 keV^X is the 2-10 keV X-ray luminosity. We calculate the jet power of a hybrid model, as a variant of a Blandford-Znajek model proposed by Meier, based on the global solution of the advection-dominated accretion flow (ADAF) surrounding a Kerr black hole (BH). Our model calculations suggest that the maximal jet power is a function of the mass accretion rate and the BH spin parameter j. The hard X-ray emission is believed to be mainly from the ADAFs in FR Is, and the mass accretion rate is therefore constrained with the X-ray emission in our ADAF model calculations. We find that the dimensionless angular momentum of BH j ≳ 0.9 is required in order to reproduce the observed relation of Pjet/LEdd–L_X^{2–10 {keV}}/L_Edd for FR Is. Our conclusion will be strengthened if part of the X-ray emission is contributed by the jets. Our results suggest that BHs in FR Is are rapidly spinning, which are almost not affected by the uncertainty of the BH mass estimates.

Abstract Copyright: ∼

Journal keyword(s): accretion, accretion disks - black hole physics - galaxies: jets - magnetohydrodynamics, MHD - X-rays: galaxies

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 - 2026 		#notes
1 3C 15 SyG 00 37 04.1107321824 -01 09 08.407668996   15.34       ~ 232 1
2 NGC 315 LIN 00 57 48.88334410 +30 21 08.8119345 12.80 12.20 11.16 11.26   ~ 869 2
3 NGC 383 AGN 01 07 24.9647814840 +32 24 45.132586200   13.6 12.14     ~ 821 3
4 NGC 507 rG 01 23 39.950 +33 15 22.22   13.0       ~ 459 1
5 Z 538-57 Sy1 02 23 11.41124925 +42 59 31.3853324   15.71 14.81     ~ 582 2
6 NGC 1218 Sy1 03 08 26.22380005 +04 06 39.3007808   12.84       ~ 413 0
7 NGC 1265 rG 03 18 15.674 +41 51 27.94   14.7       ~ 386 2
8 NGC 1275 Bla 03 19 48.1599902040 +41 30 42.108850836   13.10 12.48 11.09   ~ 4243 3
9 NGC 1316 rG 03 22 41.789 -37 12 29.52 9.81 9.15 8.53 7.66   ~ 1491 1
10 NGC 2484 Sy2 07 58 28.10812817 +37 47 11.8076475   14.15 14.9     ~ 284 1
11 MCG-02-24-007 LIN 09 18 05.66848602 -12 05 43.8060823   14.38 14.8     ~ 1077 1
12 NGC 3862 Sy2 11 45 05.00904503 +19 36 22.7409909   14.98 13.97     ~ 646 1
13 NGC 4261 LIN 12 19 23.2160630 +05 49 29.700024   13.92 12.87     ~ 1290 0
14 M 84 Sy2 12 25 03.74333 +12 53 13.1393 12.67 12.09 10.49     ~ 1841 2
15 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7815 3
16 NGC 4696 rG 12 48 49.2724775784 -41 18 39.304053252   11.21   10.7   ~ 510 3
17 3C 278 QSO 12 54 36.96 -12 33 31.8     11.6     ~ 125 3
18 NAME Centaurus A BLL 13 25 27.61521044 -43 01 08.8050291   8.18 6.84 6.66   ~ 4774 3
19 IC 4296 rG 13 36 39.03253319 -33 57 57.0730368   11.52 12.99 10.00 10.79 ~ 520 2
20 3C 288 rG 13 38 49.9 +38 51 15   18.3       ~ 176 1
21 IC 4374 Bla 14 07 29.76229070 -27 01 04.2916695   13.61   11.79 12.55 ~ 142 3
22 NGC 5532 LIN 14 16 52.9370483073 +10 48 26.616631120   13.3 12.59     ~ 364 2
23 IC 1065 Sy2 14 49 21.5927137128 +63 16 13.799495280   17.30 16.39     ~ 378 1
24 7C 151131.1+261840 Sy2 15 13 40.0235447784 +26 07 23.749576572   16.30       ~ 239 1
25 Z 49-90 Sy2 15 16 44.4893939136 +07 01 17.825410740   15.19 14.17     ~ 463 4
26 NGC 6109 LIN 16 17 40.54006 +35 00 15.1861   14.9       ~ 193 1
27 NGC 6166 Sy2 16 28 38.24470063 +39 33 04.2335319   12.78 11.78     ~ 793 2
28 NGC 6251 Bla 16 32 31.96989253 +82 32 16.3999044 15.24 14.66 12.89 7.62   ~ 772 1
29 3C 346.0 BLL 16 43 48.605 +17 15 49.43   17.2       ~ 270 1
30 NAME Sgr A* X 17 45 40.03599 -29 00 28.1699           ~ 4970 3
31 3C 388.0 SyG 18 44 02.3840387736 +45 33 29.628672300   16.91 15.56     ~ 338 1
32 MCG+07-41-003 Bla 19 59 28.35656837 +40 44 02.0972325   16.22 15.10     ~ 2537 2
33 2C 1820 SyG 21 55 52.324 +38 00 28.51   19.20       ~ 234 1
34 Z 514-50 SyG 22 31 20.5885689288 +39 21 29.593072404   14.6       ~ 446 1
35 NGC 7720 Sy1 23 38 29.38324020 +27 01 53.2580084   13.9 13.3     ~ 565 4

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