2006A&A...447..481L


C.D.S. - SIMBAD4 rel 1.7 - 2021.02.26CET18:07:27

2006A&A...447..481L - Astronomy and Astrophysics, volume 447, 481-487 (2006/2-4)

HI absorption in 3C 49 and 3C 268.3. Probing the environment of compact steep spectrum and GHz peaked spectrum sources.

LABIANO A., VERMEULEN R.C., BARTHEL P.D., O'DEA C.P., GALLIMORE J.F., BAUM S. and DE VRIES W.

Abstract (from CDS):

Localize and study the redshifted 21cm HI absorption known to occur in the subgalactic sized compact steep spectrum galaxies 3C 49 and 3C 268.3. We carried out European VLBI Network UHF band spectral line observations. We have detected HI absorption towards the western radio lobe of 3C 49 and the northern lobe of 3C 268.3. However, we cannot rule out the presence of similar amounts of HI towards the opposite and much fainter lobes. The radio lobes with detected HI absorption (1) are brighter and closer to the core than the opposite lobes; (2) are depolarized; and (3) are associated with optical emission line gas. The association between the HI absorption and the emission line gas, supports the hypothesis that the HI absorption is produced in the atomic cores of the emission line clouds. Our results are consistent with a picture in which compact steep spectrum sources interact with clouds of dense gas as they propagate through their host galaxy. We suggest that the asymmetries in the radio and optical emission can be due to interaction of a two sided radio source with an asymmetric distribution of dense clouds in their environment.

Abstract Copyright:

Journal keyword(s): galaxies: active - galaxies: individual: 3C 49 - galaxies: individual: 3C 268.3 - galaxies: quasars: absorption lines - radio lines: galaxies - galaxies: jets

Simbad objects: 12

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Number of rows : 12

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 3C 49 rG 01 41 09.10 +13 53 28.0   22.327 20.920 20.876   ~ 175 1
2 7C 022118.10+273638.00 Sy1 02 24 12.2882485914 +27 50 11.569481672   19.502 18 18.263   ~ 205 1
3 ICRF J024918.0+061951 QSO 02 49 18.0157001706 +06 19 51.949323933       17.55   ~ 26 1
4 3C 84 Sy2 03 19 48.1597607660 +41 30 42.114155434   13.10 12.48 11.09   ~ 3616 3
5 6C 104451+715930 QSO 10 48 27.6207767205 +71 43 35.941655031     19.0 17.49   ~ 195 1
6 3C 268.3 Sy1 12 06 24.70656 +64 13 36.8760   21.847 20.790 19.910   ~ 182 1
7 2E 2879 Sy1 12 52 26.3557117356 +56 34 19.567896586   18.42 18.11 17.660   ~ 273 2
8 3C 286 Sy1 13 31 08.2885060664 +30 30 32.960825108   17.51 17.25     ~ 3839 2
9 8C 1443+773 Sy2 14 43 14.0 +77 07 28   19   18.730   ~ 141 1
10 6C 161147+342017 QSO 16 13 41.0645258703 +34 12 47.911898732   17.98 17.46 17.07   ~ 585 1
11 3C 454.3 Bla 22 53 57.74798 +16 08 53.5611   16.57 16.10 15.22   ~ 2556 2
12 2E 4728 LIN 23 25 19.731 -12 07 27.51   15.45 15.46     ~ 169 2

    Equat.    Gal    SGal    Ecl

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2021.02.26-18:07:27

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