2002A&A...383..104C

Query : 2002A&A...383..104C

2002A&A...383..104C - Astronomy and Astrophysics, volume 383, 104-111 (2002/2-3)

The HST survey of the B2 sample of radio-galaxies: Optical nuclei and the FR I/BL Lac unified scheme.

CAPETTI A., CELOTTI A., CHIABERGE M., DE RUITER H.R., FANTI R., MORGANTI R. and PARMA P.

Abstract (from CDS):

We examine the optical properties of the nuclei of low luminosity radio-galaxies using snapshot HST images of the B2 sample. In agreement with the results obtained from the analysis of the brighter 3C/FR I sample, we find a correlation between fluxes (and luminosities) of the optical and radio cores. This provides further support for the interpretation that the optical nuclear emission in FR I is dominated by synchrotron emission and that accretion in these sources takes place in a low efficiency radiative regime. In the framework of the FR I/BL Lacs unified scheme, we find that the luminosity difference between FR I and BL Lac nuclei can be reproduced with a common beaming factor in both the radio and the optical band, independent of the extended radio luminosity, thus supporting such a scenario. The corresponding bulk Lorentz factor is significantly smaller than is expected from observational and theoretical considerations in BL Lacs: this can be interpreted as due to a velocity structure in the jet, with a fast spine surrounded by a slower layer.

Abstract Copyright: ∼

Journal keyword(s): galaxies: active - galaxies: elliptical and lenticular, cD - galaxies: jets - galaxies: nuclei

Simbad objects: 59

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Number of rows : 59
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 Z 479-45 rG 00 37 05.4904711536 +25 41 56.361743556   14.8       ~ 80 0
2 NGC 315 LIN 00 57 48.88334410 +30 21 08.8119345 12.80 12.20 11.16 11.26   ~ 786 2
3 NGC 326 rG 00 58 22.6298561088 +26 51 58.701156300   14.9 13     ~ 183 2
4 NGC 383 rG 01 07 24.9647814840 +32 24 45.132586200   13.6 12.14     ~ 777 3
5 4C 31.04 rG 01 19 35.00087601 +32 10 50.0619670   16 14.5     ~ 235 1
6 NGC 507 BiC 01 23 39.950 +33 15 22.22   13.0       ~ 439 3
7 NGC 708 BiC 01 52 46.482 +36 09 06.53 14.85 14.27 13.29 12.67 12.09 ~ 240 3
8 MCG+05-16-010 AGN 06 52 02.5060831464 +27 27 39.387328884   14.9       ~ 81 1
9 LEDA 20369 Sy2 07 11 47.7 +32 18 35     15.8     ~ 31 0
10 Z 147-20 Sy2 07 25 37.4 +29 57 15   15.60       ~ 92 2
11 NGC 2484 Sy2 07 58 28.10812817 +37 47 11.8076475   14.15 14.9     ~ 268 1
12 6C 0908+3736 BiC 09 11 53.6156551968 +37 24 13.311359568   16.1       ~ 71 1
13 7C 0915+3203 AGN 09 18 57.9197964240 +31 51 10.798451460   15.5       ~ 62 1
14 IC 2476 LIN 09 27 52.8290410824 +29 59 08.744484660   14.5       ~ 95 0
15 ICRF J100601.7+345410 Sy2 10 06 01.75023017 +34 54 10.4016113   15.97       ~ 450 2
16 7C 100349.6+260921 BiC 10 06 38.816 +25 54 44.82   16.21       ~ 44 1
17 2MASX J10075705+2801479 BiC 10 07 57.0708319728 +28 01 47.966189592           ~ 36 0
18 Mrk 421 BLL 11 04 27.3140835504 +38 12 31.798495872   13.50 12.90 8.31   ~ 2671 1
19 7C 111324.1+245739 BiC 11 16 03.802 +24 41 02.08   15.80       ~ 33 0
20 7C 120500.2+340922 Sy2 12 07 32.930 +33 52 40.13   16.4       ~ 92 1
21 NGC 4278 LIN 12 20 06.8242 +29 16 50.722 11.54 11.09 10.16     ~ 946 2
22 M 84 Sy2 12 25 03.74333 +12 53 13.1393 12.67 12.09 10.49     ~ 1762 2
23 3C 277.3 BLL 12 54 12.0071453880 +27 37 33.952663740   15.94       ~ 366 1
24 NGC 4869 rG 12 59 23.3588349024 +27 54 41.731884360 15.03 14.9 13.52 13.292 12.536 ~ 278 0
25 NGC 4874 LIN 12 59 35.7093764280 +27 57 33.293892204 13.01 13.7 11.40 12.122 11.386 ~ 780 3
26 NGC 5127 LIN 13 23 45.0315298080 +31 33 56.527040808   13.9       ~ 177 0
27 NGC 5141 Sy2 13 24 51.44109717 +36 22 42.7725745   13.9       ~ 187 1
28 4C 26.41 rG 13 41 50.4521371440 +26 22 12.897805224   15.3 15.3     ~ 59 3
29 ACO 1775 ClG 13 41 50.60 +26 21 10.6           ~ 303 0
30 Z 162-10 LIN 13 48 52.4892734448 +26 35 34.353002688   14.0       ~ 237 2
31 NVSS J135013+281644 rG 13 50 13.5886368960 +28 16 45.022767744   16.02       ~ 42 1
32 3C 293.0 BLL 13 52 17.8719816576 +31 26 46.487381604   16.10 15.10     ~ 471 3
33 NVSS J140000+283038 rG 14 00 00.5 +28 30 38           ~ 38 1
34 ICRF J142440.5+263730 Sy2 14 24 40.5266308536 +26 37 30.467191764   15.6 15.62     ~ 113 1
35 4C 25.46 rG 14 32 41.4662315352 +24 55 17.916655008     16.5     ~ 43 1
36 MCG+05-35-018 AGN 14 49 27.9240277488 +27 46 50.329531668   15.0       ~ 53 1
37 NVSS J145233+275758 rG 14 52 33.1 +27 57 58           ~ 67 1
38 2MASX J14575384+2832188 Sy2 14 57 53.8041194496 +28 32 18.736654452   16.00       ~ 46 1
39 7C 1457+2915 BLL 14 59 41.9530973616 +29 03 31.813059816           ~ 28 1
40 VV 204 LIN 15 04 57.1195361592 +26 00 58.455780156   15.24       ~ 288 0
41 4C 26.47 AGN 15 13 40.0235447784 +26 07 23.749576572   16.30       ~ 230 1
42 NVSS J151404+300846 rG 15 14 04.1733109056 +30 08 47.270705424   16.47       ~ 37 0
43 4C 28.39 LIN 15 23 26.9109001896 +28 37 32.500601976   15.68 15.5     ~ 74 1
44 UGC 9861 BiC 15 27 45.1081448688 +28 55 44.253811812   15.4       ~ 28 0
45 2MASX J15294558+3042355 BiC 15 29 45.6060501696 +30 42 35.606949768           ~ 44 0
46 UGC 10094 B LIN 15 56 03.8798 +24 26 53.438   15.4       ~ 97 1
47 IC 4587 LIN 15 59 51.6141497592 +25 56 26.318529096   15.5       ~ 60 1
48 NGC 6086 BiC 16 12 35.5357829352 +29 29 05.246712168   14.8       ~ 193 1
49 NVSS J161531+272657 rG 16 15 31.3601937240 +27 26 57.334964640           ~ 44 1
50 3C 332.0 Sy1 16 17 42.5380089648 +32 22 34.372277976   18.25 17.45     ~ 253 1
51 NGC 6166 Sy2 16 28 38.24470063 +39 33 04.2335319   12.78 11.78     ~ 763 5
52 4C 30.31 rG 17 00 45.2320367856 +30 08 12.874902000   15.00 14.3     ~ 72 0
53 4C 31.47 rG 17 28 20.1089243496 +31 46 02.604685584   15.5       ~ 129 1
54 NVSS J182852+321855 Rad 18 28 52.80 +32 18 55.0           ~ 35 1
55 ICRF J183503.3+324146 Sy1 18 35 03.3896172576 +32 41 46.855964616   16.50 15.39 10.50   ~ 652 1
56 NGC 7052 rG 21 18 33.0441963648 +26 26 49.174586196 15.52 14.85 13.09     ~ 323 1
57 UGC 12064 AGN 22 31 20.5885689288 +39 21 29.593072404   14.6       ~ 437 1
58 NVSS J223829+351946 rG 22 38 29.417 +35 19 46.84   15.0       ~ 105 1
59 NGC 7720 Sy1 23 38 29.38324020 +27 01 53.2580084   13.9 13.3     ~ 541 4

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