2005A&A...439..935C


C.D.S. - SIMBAD4 rel 1.7 - 2021.02.28CET20:16:53

2005A&A...439..935C - Astronomy and Astrophysics, volume 439, 935-946 (2005/9-1)

The HST view of the nuclear emission line region in low luminosity radio-galaxies.

CAPETTI A., VERDOES KLEIJN G.A. and CHIABERGE M.

Abstract (from CDS):

We study the properties of the emission line regions in two samples of low luminosity radio-galaxies, while focusing on the Compact Emission Line Region (CELR) revealed to be a characteristic feature of these objects by HST narrow-band imaging. We find a strong correlation between line and optical continuum nuclear emission, which suggests that the optical cores (most likely of non-thermal origin) can be directly associated to the source of ionizing photons, i.e. that we are seeing a jet-ionized narrow line region. A photon budget argument indicates that the optical nuclear sources produce sufficient photon flux provided that the covering factor of the circum-nuclear gas is rather large, on average ∼0.3. Analysis of HST images and spectra suggests that the CELR may take the form of a pc-scale, high filling factor structure, possibly an optically thin torus. Estimates of the CELR mass lead to values as small as 10-103M, and photon counting sets a limit to the Broad Line Region mass of MBLR<10–2M. When considered together with the low accretion rate and the tenuous torus structure, a general paucity of gas in the innermost regions of low luminosity radio-galaxies emerges as the main characterizing difference from more powerful Active Galactic Nuclei.

Abstract Copyright:

Journal keyword(s): galaxies: active - galaxies: nucleus - galaxies: jets

Simbad objects: 33

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Number of rows : 33

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 NGC 193 rG 00 39 18.578 +03 19 52.87   14.3       ~ 123 1
2 87GB 005314.6+260945 BiC 00 55 50.583 +26 24 36.68   18.63   16.26   ~ 198 1
3 UGC 595 AGN 00 57 34.920 -01 23 27.89   14.07 15.10     ~ 232 1
4 NGC 315 LIN 00 57 48.88335 +30 21 08.8122 12.80 12.20 11.16 11.26   ~ 719 2
5 NGC 383 rG 01 07 24.95870 +32 24 45.2140   13.6 12.14     ~ 729 3
6 NGC 541 IG 01 25 44.305 -01 22 46.19 13.42 13.03 12.08     ~ 192 2
7 NGC 741 rG 01 56 20.959 +05 37 43.77   13.2       ~ 268 2
8 UGC 1841 Sy1 02 23 11.41124 +42 59 31.3840   15.71 14.81     ~ 533 2
9 NGC 1218 Sy1 03 08 26.2238190 +04 06 39.300921   12.84       ~ 351 1
10 NGC 1265 GiC 03 18 15.674 +41 51 27.94   14.7       ~ 351 2
11 3C 84 Sy2 03 19 48.1597607660 +41 30 42.114155434   13.10 12.48 11.09   ~ 3616 3
12 NGC 2329 AGN 07 09 08.0060407484 +48 36 55.739351597   13.7 13.99     ~ 118 3
13 NGC 2892 rG 09 32 52.899 +67 37 02.64   14.4       ~ 57 1
14 NGC 3801 LIN 11 40 16.897 +17 43 40.48   13.3       ~ 187 1
15 3C 264.0 QSO 11 45 05.0090520 +19 36 22.741257   14.98 13.97     ~ 546 2
16 UGC 7115 LIN 12 08 05.551 +25 14 14.26   14.4       ~ 77 0
17 NGC 4261 LIN 12 19 23.2160630 +05 49 29.700024   13.92 12.87     ~ 1132 0
18 NGC 4335 rG 12 23 01.908 +58 26 40.96   13.7       ~ 76 1
19 M 84 Sy2 12 25 03.74333 +12 53 13.1393 12.67 12.09 10.49     ~ 1662 2
20 M 87 BiC 12 30 49.42338230 +12 23 28.0438581 10.16 9.59 8.63   7.49 ~ 6349 3
21 3C 277.3 BLL 12 54 12.052 +27 37 34.15   15.94       ~ 346 1
22 NGC 5127 LIN 13 23 45.018 +31 33 56.72   13.9       ~ 162 0
23 NGC 5141 LIN 13 24 51.4411147 +36 22 42.772637   13.9       ~ 171 1
24 NAME Centaurus A Sy2 13 25 27.61509104 -43 01 08.8056025   8.18 6.84 6.66   ~ 4075 3
25 NGC 5490 rG 14 09 57.330 +17 32 43.53   13.4 15.5     ~ 148 1
26 3C 338.0 QSO 16 28 38.2447110 +39 33 04.233634   12.78 11.78     ~ 713 5
27 NGC 6251 Sy2 16 32 31.96990024 +82 32 16.3999540 15.24 14.66 12.89 7.62   ~ 680 0
28 3C 346.0 BLL 16 43 48.605 +17 15 49.43   17.2       ~ 250 0
29 NGC 7052 rG 21 18 33.047 +26 26 48.65 15.52 14.85 13.09     ~ 303 1
30 NGC 7236 LIN 22 14 44.989 +13 50 47.43   14.3 14.3     ~ 259 2
31 UGC 12064 AGN 22 31 20.625 +39 21 29.81   14.6       ~ 422 1
32 NGC 7626 rG 23 20 42.524 +08 13 01.43   12.8       ~ 407 1
33 NGC 7720 Sy1 23 38 29.38322439 +27 01 53.2583763   13.9 13.3     ~ 516 4

    Equat.    Gal    SGal    Ecl

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2021.02.28-20:16:53

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