2006A&A...451...35B


C.D.S. - SIMBAD4 rel 1.7 - 2020.09.18CEST13:09:12

2006A&A...451...35B - Astronomy and Astrophysics, volume 451, 35-44 (2006/5-3)

The Chandra view of the 3C/FR I sample of low luminosity radio-galaxies.

BALMAVERDE B., CAPETTI A. and GRANDI P.

Abstract (from CDS):

We present results from Chandra observations of the 3C/FR I sample of low luminosity radio-galaxies. We detected a power-law nuclear component in 12 objects out of the 18 with available data. In 4 galaxies we detected nuclear X-ray absorption at a level of NH~(0.2-6)x1022cm–2. X-ray absorbed sources are associated with the presence of highly inclined dusty disks (or dust filaments projected onto the nuclei) seen in the HST images. This suggests the existence of a flattened X-ray absorber, but of much lower optical depth than in classical obscuring tori. We thus have an unobstructed view toward most FR I nuclei, while absorption plays only a marginal role in the remaining objects. Three pieces of evidence support a jet origin for the X-ray cores: i) the presence of strong correlations between the nuclear luminosities in the radio, optical, and X-ray bands, extending over 4 orders of magnitude and having a much smaller dispersion (∼0.3dex) when compared to similar trends found for other classes of AGNs, all of which points to a common origin for the emission in the three bands; ii) the close similarity of the broad-band spectral indices with the sub-class of BL Lac objects sharing the same range of extended radio-luminosity, in accord with the FR I/BL Lacs unified model; iii) the presence of a common luminosity evolution of spectral indices in both FR I and BL Lacs. The low luminosities of the X-ray nuclei, regardless of their origin, strengthens the interpretation of low efficiency accretion in low luminosity radio-galaxies.

Abstract Copyright:

Journal keyword(s): galaxies: active - galaxies: BL Lacertae objects: general - galaxies: nuclei - galaxies: jets

Simbad objects: 22

goto Full paper

goto View the reference in ADS

Number of rows : 22

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 87GB 005314.6+260945 BiC 00 55 50.583 +26 24 36.68   18.63   16.26   ~ 196 1
2 NGC 383 rG 01 07 24.95870 +32 24 45.2140   13.6 12.14     ~ 721 3
3 UGC 1841 Sy1 02 23 11.41124 +42 59 31.3840   15.71 14.81     ~ 528 2
4 3C 75 PaG 02 57 41.64 +06 01 28.0           ~ 285 1
5 NGC 1218 Sy1 03 08 26.2238190 +04 06 39.300921   12.84       ~ 345 1
6 NGC 1265 GiC 03 18 15.674 +41 51 27.94   14.7       ~ 350 2
7 3C 84 Sy2 03 19 48.1597607660 +41 30 42.114155434   13.10 12.48 11.09   ~ 3567 3
8 3C 189 QSO 07 58 28.10816 +37 47 11.8073   14.15 14.9     ~ 231 1
9 NGC 4261 LIN 12 19 23.2160630 +05 49 29.700024   13.92 12.87     ~ 1121 0
10 M 84 Sy2 12 25 03.74333 +12 53 13.1393 12.67 12.09 10.49     ~ 1640 2
11 M 87 BiC 12 30 49.42338230 +12 23 28.0438581 10.16 9.59 8.63   7.49 ~ 6255 3
12 UGC 8782 LIN 13 52 17.880 +31 26 46.49   16.10 15.10     ~ 423 3
13 NGC 5532 LIN 14 16 52.928 +10 48 26.43   13.3       ~ 322 3
14 IC 1065 Sy2 14 49 21.5921149894 +63 16 13.816373757   17.30 16.39     ~ 337 1
15 3C 314.1 rG 15 10 23.1 +70 45 54   17       ~ 89 0
16 UGC 9799 Sy2 15 16 44.4894653562 +07 01 17.830884159   15.19 14.17     ~ 416 3
17 3C 338.0 QSO 16 28 38.2447110 +39 33 04.233634   12.78 11.78     ~ 706 5
18 2MASX J16434862+1715489 Sy2 16 43 48.605 +17 15 49.43   17.2       ~ 247 0
19 NAME Hercules A BiC 16 51 08.024 +04 59 34.91     18.25     ~ 434 1
20 2MASX J21234458+2504272 Sy2 21 23 44.582 +25 04 27.23   17.660 16.350     ~ 300 0
21 2MASX J21555232+3800285 SyG 21 55 52.324 +38 00 28.51   19.20       ~ 214 1
22 UGC 12064 AGN 22 31 20.625 +39 21 29.81   14.6       ~ 420 1

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2006A&A...451...35B and select 'bookmark this link' or equivalent in the popup menu


2020.09.18-13:09:12

© Université de Strasbourg/CNRS

    • Contact