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

Full paper

View the references in ADS

Number of rows : 49

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag B	Mag V	Mag R	Sp type	#ref 1850 - 2023	#notes
1	ICRF J002225.4+001456	BiC	00 22 25.42584644	+00 14 56.1630395	21.1			~	115	1
2	QSO B0023-263	BLL	00 25 49.15629900	-26 02 12.6141092	20.30	19.5	18.084	~	157	1
3	QSO B0108+388	Bla	01 11 37.31680	+39 06 28.1039		22	22.000	~	249	1
4	4C 31.04	rG	01 19 35.00087601	+32 10 50.0619670	16	14.5		~	230	1
5	3C 48	QSO	01 37 41.2996631208	+33 09 35.080388820	16.62	16.20		~	2765	2
6	3C 49	rG	01 41 09.2	+13 53 28	22.327	20.920	20.876	~	181	1
7	7C 022118.10+273638.00	Sy1	02 24 12.2865158736	+27 50 11.538285648	19.502	18	18.263	~	206	1
8	3C 93.1	BLL	03 48 46.9073426592	+33 53 15.461439576	20.723		19.110	~	129	1
9	ICRF J041045.6+765645	AGN	04 10 45.61079426	+76 56 45.3130641	21	22.0	21.200	~	157	1
10	PKS 0428+205	rG	04 31 03.76141386	+20 37 34.2648470	22.174		19.085	~	185	1
11	ICRF J050321.1+020304	Sy2	05 03 21.19716454	+02 03 04.6765714	22.500	21.350	20.682	~	186	1
12	ICRF J054236.1+495107	Sy1	05 42 36.13789710	+49 51 07.2337139	18.45	17.80	17.210	~	1449	1
13	ICRF J055652.6-024105	Sy2	05 56 52.62300614	-02 41 05.5163562	20.968		19.533	~	33	1
14	QSO B0646+600	QSO	06 50 31.25435548	+60 01 44.5549353	18.9	18.6	19.65	~	115	1
15	QSO B0710+439	QSO	07 13 38.16413557	+43 49 17.2072102	20.7			~	239	0
16	ICRF J074110.7+311200	Sy1	07 41 10.70330407	+31 12 00.2291151	17.02	16.89	16.322	~	442	1
17	ICRF J090933.4+425346	Sy2	09 09 33.49714902	+42 53 46.4821036	19.98	19.42	18.220	~	496	0
18	ICRF J094336.9-081930	LIN	09 43 36.94453828	-08 19 30.8202783	19.401		18.100	~	119	2
19	ICRF J103507.0+562846	Sy2	10 35 07.03998083	+56 28 46.7956247	20.2	21.244	20.200	~	186	1
20	ICRF J111120.0+195536	Sy2	11 11 20.06563417	+19 55 35.9999974	18.5	18.5		~	55	1
21	ICRF J112027.8+142054	G	11 20 27.80814059	+14 20 54.9730732	20	20.935	20.100	~	160	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	~	186	1
24	2E 2879	Sy1	12 52 26.3561235816	+56 34 19.573734864	18.42	18.11	17.660	~	286	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	~	167	1
27	ICRF J134733.3+121724	Sy2	13 47 33.36161873	+12 17 24.2398927	19.28	18.44	15.718	~	580	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	~	172	1
30	QSO B1404+286	BLL	14 07 00.39441712	+28 27 14.6901341	16.13	15.35	10.29	~	753	2
31	ICRF J141414.8+455448	G	14 14 14.8497	+45 54 48.730				~	31	1
32	QSO B1413+135	BLL	14 15 58.81751033	+13 20 23.7128587	21.055	20.000	18.461	~	417	1
33	8C 1443+773	Sy2	14 43 14.8	+77 07 29	19		18.730	~	146	1
34	ICRF J154609.5+002624	Bla	15 46 09.53146317	+00 26 24.6145149	19.730	18.900	19.5	~	82	1
35	ICRF J160913.3+264129	Sy2	16 09 13.3196	+26 41 29.042	19			~	229	0
36	3C 346.0	BLL	16 43 48.605	+17 15 49.43	17.2			~	261	0
37	7C 1815+6125	BLL	18 15 36.79225624	+61 27 11.6475505	21.272		19.122	~	38	1
38	ICRF J181623.9+345745	Sy2	18 16 23.90102409	+34 57 45.7493697	20.342		18.459	~	28	1
39	ICRF J182314.1+793849	Sy2	18 23 14.10855195	+79 38 49.0018505	19.269	16.70	17.415	~	66	1
40	ICRF J182931.7+484446	Sy1	18 29 31.7809732968	+48 44 46.160168892	17.05	16.81	16.860	~	676	1
41	ICRF J194431.5+544807	BLL	19 44 31.51155734	+54 48 07.0622434	21.732		18.591	~	69	1
42	QSO B1946+708	BLL	19 45 53.51966298	+70 55 48.7285673	18.726	16.70	17.199	~	136	2
43	ICRF J202206.6+613658	Sy2	20 22 06.68174620	+61 36 58.8047323		19.00	17.58	~	315	1
44	ICRF J205252.0+363535	Sy2	20 52 52.05501061	+36 35 35.3005698	22.083		21.200	~	102	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	~	112	1
47	2MASX J22502534+1419519	Sy1	22 50 25.3475290512	+14 19 52.095751140	17.28	16.97	17.243	~	202	1
48	ICRF J234403.7+822640	Sy2	23 44 03.8302221504	+82 26 40.345410408	21.769	20.5	20.220	~	96	1
49	6C 235239+493337	BLL	23 55 09.45814429	+49 50 08.3394994	21.101		18.400	~	262	1

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