2005A&A...441...89G


Query : 2005A&A...441...89G

2005A&A...441...89G - Astronomy and Astrophysics, volume 441, 89 (2005/10-1)

Low power compact radio galaxies at high angular resolution.

GIROLETTI M., GIOVANNINI G. and TAYLOR G.B.

Abstract (from CDS):

We present sub-arcsecond resolution multi-frequency (8 and 22GHz) VLA images of five low power compact (LPC) radio sources, and phase referenced VLBA images at 1.6GHz of their nuclear regions. At the VLA resolution we resolve the structure and identify component positions and flux densities. The phase referenced VLBA data at 1.6GHz reveals flat-spectrum, compact cores (down to a few milliJansky) in four of the five sources. The absolute astrometry provided by the phase referencing allows us to identify the center of activity on the VLA images. Moreover, these data reveal rich structures, including two-sided jets and secondary components. On the basis of the arcsecond scale structures and of the nuclear properties, we rule out the presence of strong relativistic effects in our LPCs, which must be intrinsically small (deprojected linear sizes <10kpc). Fits of continuous injection models reveal break frequencies in the GHz domain, and ages in the range 105-107yrs. In LPCs, the outermost edge may be advancing more slowly than in more powerful sources or could even be stationary; some LPCs might also have ceased their activity. In general, the properties of LPCs can be related to a number of reasons, including, but not limited to: youth, frustration, low kinematic power jets, and short-lived activity in the radio.

Abstract Copyright:

Journal keyword(s): radio continuum: galaxies - galaxies: individual: 1855+37 - galaxies: active - galaxies: jets

CDS comments: Table 2 22GHz phase calibrators not identified.

Simbad objects: 29

goto Full paper

goto View the references in ADS

Number of rows : 29
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 4C 31.04 rG 01 19 34.9816472856 +32 10 50.119481928   16 14.5     ~ 224 1
2 3C 48 QSO 01 37 41.2996631208 +33 09 35.080388820   16.62 16.20     ~ 2675 2
3 7C 022224.00+365659.00 Bla 02 25 27.3274623744 +37 10 27.746857308   15.0   9.5   ~ 58 1
4 4C 34.07 QSO 02 26 10.3332356 +34 21 30.287547   21.3       ~ 90 1
5 4C 28.07 QSO 02 37 52.4057664048 +28 48 08.990026884     18.5 16.99   ~ 551 1
6 NGC 1167 LIN 03 01 42.3322774176 +35 12 20.300948892   13.84 12.77     ~ 324 2
7 UGC 2489 GiC 03 01 51.4 +35 50 23           ~ 172 1
8 [VV96] J031049.8+381453 BLL 03 10 49.8789510144 +38 14 53.836057104     19.70 19.21   ~ 92 0
9 ICRF J054236.1+495107 Sy1 05 42 36.1380355416 +49 51 07.232213736   18.45 17.80 17.210   ~ 1383 1
10 ICRF J064524.0+212151 AGN 06 45 24.0994795344 +21 21 51.200751492   19.5       ~ 131 1
11 NVSS J064615+304123 Rad 06 46 15.2380896 +30 41 23.631784           ~ 10 1
12 MCG+05-16-010 AGN 06 52 02.5060831464 +27 27 39.387328884   14.9       ~ 78 1
13 ICRF J074110.7+311200 Sy1 07 41 10.7033429280 +31 12 00.230596416   17.02 16.89 16.322   ~ 427 1
14 2MASX J08400233+2949027 Sy2 08 40 02.336 +29 49 02.73   20.00 19.62     ~ 166 1
15 ICRF J092703.0+390220 Sy1 09 27 03.0138528936 +39 02 20.850343332   17.17 17.00 16.486   ~ 959 1
16 ICRF J095649.8+251516 Sy1 09 56 49.8756920040 +25 15 16.049435040   17.46 17.21 17.96   ~ 298 1
17 7C 1034+2850 QSO 10 37 43.8338848896 +28 34 59.479739832           ~ 16 1
18 7C 103742.79+301338.00 LIN 10 40 29.9436842112 +29 57 57.795289452   16       ~ 45 1
19 7C 1144+3517 BLL 11 47 22.1297825184 +35 01 07.538786184   17.89 16.83 10.26   ~ 164 1
20 NGC 4278 LIN 12 20 06.8253868 +29 16 50.713486 11.54 11.09 10.16     ~ 915 2
21 NGC 4874 LIN 12 59 35.7093764280 +27 57 33.293892204 13.01 13.7 11.40 12.122 11.386 ~ 750 3
22 ACO 1656 ClG 12 59 48.7 +27 58 50           ~ 4502 2
23 3C 286 Sy1 13 31 08.2883506368 +30 30 32.960091564   17.51 17.25     ~ 4065 2
24 IC 4587 LIN 15 59 51.6141497592 +25 56 26.318529096   15.5       ~ 52 1
25 4C 39.49 BLL 16 53 52.2160772976 +39 45 36.613228860 14.09 14.15 13.29 8.26   ~ 2017 2
26 7C 180003.10+440418.00 QSO 18 01 32.3150148024 +44 04 21.895465224   16.8 16.8 15.29   ~ 184 1
27 NVSS J185737+380033 rG 18 57 37.500 +38 00 32.20   14.9       ~ 54 1
28 CIZA J1857.6+3800 ClG 18 57 39.5 +38 00 30           ~ 10 0
29 [VV98] J191225.1+374037 QSO 19 12 25.1219479848 +37 40 36.648208884     20.00 18.89   ~ 32 0

To bookmark this query, right click on this link: simbad:objects in 2005A&A...441...89G and select 'bookmark this link' or equivalent in the popup menu


2022.05.28-01:23:31

© Université de Strasbourg/CNRS

    • Contact