2003A&A...404..871P

Query : 2003A&A...404..871P

2003A&A...404..871P - Astronomy and Astrophysics, volume 404, 871-881 (2003/6-4)

The presence and distribution of H I absorbing gas in sub-galactic sized radio sources.

PIHLSTROEM Y.M., CONWAY J.E. and VERMEULEN R.C.

Abstract (from CDS):

We consider the incidence of Hi absorption in intrinsically small sub-galactic sized extragalactic sources selected from sources classified as Gigahertz Peaked Spectrum (GPS) and Compact Steep Spectrum (CSS) sources. We find that the smaller sources (<0.5kpc) have larger Hi column densities than the larger sources (>0.5kpc). Both a spherical and an axi-symmetric gas distribution, with a radial power law density profile, can be used to explain this anti-correlation between projected linear size and Hi column density. Since most detections occur in objects classified as galaxies, we argue that if the unified schemes apply to GPS/CSSs a disk distribution for the Hi is more likely. The most favoured explanation for the compact sizes of the GPS/CSSs is that they are young sources evolving in a power law density medium. For the GPSs with measured expansion velocities, our derived densities are within an order of magnitude of those estimated from ram-pressure confinement of the lobes assuming equipartition. Our results therefore support the youth model.

Abstract Copyright: ∼

Journal keyword(s): galaxies: active - galaxies: evolution - galaxies: ISM - radio lines: galaxies

CDS comments: Table 1 : OM 214 = OHIO M 214.

Simbad objects: 49

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Number of rows : 49
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 ICRF J002225.4+001456 Sy2 00 22 25.42584644 +00 14 56.1630395   21.1       ~ 119 1
2 QSO B0023-263 BLL 00 25 49.15629900 -26 02 12.6141092   20.30 19.5 18.084   ~ 161 1
3 QSO B0108+388 Bla 01 11 37.31680 +39 06 28.1039     22 22.000   ~ 254 1
4 4C 31.04 rG 01 19 35.00087601 +32 10 50.0619670   16 14.5     ~ 235 1
5 3C 48 QSO 01 37 41.2996631208 +33 09 35.080388820   16.62 16.20     ~ 2815 2
6 3C 49 rG 01 41 09.2 +13 53 28   22.327 20.920 20.876   ~ 183 1
7 7C 022118.10+273638.00 Sy1 02 24 12.2865158736 +27 50 11.538285648   19.502 18 18.263   ~ 209 1
8 3C 93.1 BLL 03 48 46.9073426592 +33 53 15.461439576   20.723   19.110   ~ 131 1
9 ICRF J041045.6+765645 AGN 04 10 45.61079426 +76 56 45.3130641   21 22.0 21.200   ~ 158 1
10 PKS 0428+205 rG 04 31 03.76141386 +20 37 34.2648470   22.174   19.085   ~ 189 1
11 ICRF J050321.1+020304 Sy2 05 03 21.19716454 +02 03 04.6765714   22.500 21.350 20.682   ~ 188 1
12 ICRF J054236.1+495107 Sy1 05 42 36.13789710 +49 51 07.2337139   18.45 17.80 17.210   ~ 1493 1
13 ICRF J055652.6-024105 Sy2 05 56 52.62300614 -02 41 05.5163562   20.968   19.533   ~ 34 1
14 QSO B0646+600 QSO 06 50 31.25435548 +60 01 44.5549353   18.9 18.6 19.65   ~ 117 1
15 QSO B0710+439 QSO 07 13 38.16413557 +43 49 17.2072102   20.7       ~ 244 0
16 ICRF J074110.7+311200 Sy1 07 41 10.70330407 +31 12 00.2291151   17.02 16.89 16.322   ~ 450 1
17 ICRF J090933.4+425346 Sy2 09 09 33.49714902 +42 53 46.4821036   19.98 19.42 18.220   ~ 503 0
18 ICRF J094336.9-081930 LIN 09 43 36.94453828 -08 19 30.8202783   19.401   18.100   ~ 121 2
19 ICRF J103507.0+562846 Sy2 10 35 07.03998083 +56 28 46.7956247   20.2 21.244 20.200   ~ 192 1
20 ICRF J111120.0+195536 Sy2 11 11 20.06563417 +19 55 35.9999974   18.5 18.5     ~ 58 1
21 ICRF J112027.8+142054 Sy2 11 20 27.80814059 +14 20 54.9730732   20 20.935 20.100   ~ 167 1
22 3C 258 rG 11 24 43.8 +19 19 30   22.082 21.448 20.513   ~ 85 1
23 3C 268.3 Sy1 12 06 24.70656 +64 13 36.8760   21.847 20.790 19.910   ~ 188 1
24 2E 2879 Sy1 12 52 26.3561235816 +56 34 19.573734864   18.42 18.11 17.660   ~ 287 2
25 PKS 1306-09 rG 13 08 39.1573432224 -09 50 32.424542340   20.767 20.500 18.439   ~ 76 1
26 4C 32.44 QSO 13 26 16.5142 +31 54 09.522   21.367 19.822 18.882   ~ 171 1
27 ICRF J134733.3+121724 Sy2 13 47 33.36161873 +12 17 24.2398927   19.28 18.44 15.718   ~ 597 3
28 NVSS J135740+435400 rG 13 57 40.5870 +43 53 59.772     22.708 20.951   ~ 47 1
29 ICRF J140028.6+621038 Sy2 14 00 28.64823540 +62 10 38.5885744   22.137 20.373 19.530   ~ 177 1
30 Mrk 668 Sy1 14 07 00.39441712 +28 27 14.6901341   16.13 15.35 10.29   ~ 773 2
31 ICRF J141414.8+455448 Sy2 14 14 14.8497 +45 54 48.730           ~ 34 1
32 ICRF J141558.8+132023 Sy2 14 15 58.81751033 +13 20 23.7128587   21.055 20.000 18.461   ~ 437 1
33 8C 1443+773 Sy2 14 43 14.8 +77 07 29   19   18.730   ~ 146 1
34 ICRF J154609.5+002624 Sy2 15 46 09.53146317 +00 26 24.6145149   19.730 18.900 19.5   ~ 85 1
35 ICRF J160913.3+264129 Sy2 16 09 13.3196 +26 41 29.042   19       ~ 237 0
36 3C 346.0 BLL 16 43 48.605 +17 15 49.43   17.2       ~ 264 0
37 7C 1815+6125 BLL 18 15 36.79225624 +61 27 11.6475505   21.272   19.122   ~ 39 1
38 ICRF J181623.9+345745 Sy2 18 16 23.90102409 +34 57 45.7493697   20.342   18.459   ~ 30 1
39 ICRF J182314.1+793849 Sy2 18 23 14.10855195 +79 38 49.0018505   19.269 16.70 17.415   ~ 67 1
40 ICRF J182931.7+484446 Sy1 18 29 31.7809732968 +48 44 46.160168892   17.05 16.81 16.860   ~ 688 1
41 ICRF J194431.5+544807 BLL 19 44 31.51155734 +54 48 07.0622434   21.732   18.591   ~ 72 1
42 QSO B1946+708 BLL 19 45 53.51966298 +70 55 48.7285673   18.726 16.70 17.199   ~ 139 2
43 ICRF J202206.6+613658 Sy2 20 22 06.68174620 +61 36 58.8047323     19.00 17.58   ~ 321 1
44 ICRF J205252.0+363535 Sy2 20 52 52.05501061 +36 35 35.3005698   22.083   21.200   ~ 106 1
45 ICRF J213750.0-204231 Sy1 21 37 50.00785656 -20 42 31.6728477   20.400 19.4 19.286   ~ 95 1
46 ICRF J215137.8+055212 Sy1 21 51 37.87549026 +05 52 12.9545152   23.700 22.050 20.850   ~ 114 1
47 2MASX J22502534+1419519 Sy1 22 50 25.3475290512 +14 19 52.095751140   17.28 16.97 17.243   ~ 205 1
48 ICRF J234403.7+822640 Sy2 23 44 03.8302221504 +82 26 40.345410408   21.769 20.5 20.220   ~ 97 1
49 6C 235239+493337 BLL 23 55 09.45814429 +49 50 08.3394994   21.101   18.400   ~ 267 1

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