2013MNRAS.429.2380C

Query : 2013MNRAS.429.2380C

2013MNRAS.429.2380C - Mon. Not. R. Astron. Soc., 429, 2380-2391 (2013/March-1)

Associated 21-cm absorption towards the cores of radio galaxies.

CHANDOLA Y., GUPTA N. and SAIKIA D.J.

Abstract (from CDS):

We present the results of Giant Metrewave Radio Telescope observations to detect Hi in absorption towards the cores of a sample of radio galaxies. From observations of a sample of 16 sources, we detect Hi in absorption towards the core of only one source, the Fanaroff-Riley type II (FRII) radio galaxy 3C452 which has been reported earlier by Gupta & Saikia. In this paper we present the results for the remaining sources which have been observed to a similar optical depth as for a comparison sample of compact steep-spectrum (CSS) and gigahertz peaked-spectrum (GPS) sources. We also compile available information on Hi absorption towards the cores of extended radio sources observed with angular resolutions of a few arcsec or better. The fraction of extended sources with detection of Hi absorption towards their cores is significantly smaller (7/47) than the fraction of Hi detection towards CSS and GPS objects (28/49). For the cores of extended sources, there is no evidence of a significant correlation between Hi column density towards the cores and the largest linear size of the sources. The distribution of the relative velocity of the principal absorbing component towards the cores of extended sources is not significantly different from that of the CSS and GPS objects. However, a few of the CSS and GPS objects have blueshifted components ≳ 1000km/s, possibly due to jet-cloud interactions. With the small number of detections towards cores, the difference in the detection rate between FRI (4/32) and FRII (3/15) sources is within the statistical uncertainties.

Abstract Copyright: © 2012 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2012)

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

Simbad objects: 68

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Number of rows : 68
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 3C 15 BiC 00 37 04.1107321824 -01 09 08.407668996   15.34       ~ 223 1
2 UGC 595 AGN 00 57 34.90446247 -01 23 27.5469897   14.07 15.10     ~ 254 1
3 NGC 315 LIN 00 57 48.88334410 +30 21 08.8119345 12.80 12.20 11.16 11.26   ~ 787 2
4 NGC 383 rG 01 07 24.9647814840 +32 24 45.132586200   13.6 12.14     ~ 778 3
5 NGC 547 AGN 01 26 00.6208982520 -01 20 42.432452268   13.16 13.34     ~ 349 4
6 3C 48 QSO 01 37 41.2996631208 +33 09 35.080388820   16.62 16.20     ~ 2815 2
7 4C 35.03 rG 02 09 38.5601991144 +35 47 50.778945420   14.9 13.0     ~ 150 2
8 UGC 1841 Sy1 02 23 11.41124925 +42 59 31.3853324   15.71 14.81     ~ 561 2
9 NGC 1167 LIN 03 01 42.3322774176 +35 12 20.300948892   13.84 12.77     ~ 355 2
10 NGC 1218 Sy1 03 08 26.22380005 +04 06 39.3007808   12.84       ~ 382 1
11 ICRF J031301.9+412001 Sy1 03 13 01.96212044 +41 20 01.1834497   18.0   14.59   ~ 166 0
12 ACO 426 ClG 03 19 47.2 +41 30 47           ~ 2259 1
13 3C 84 Sy2 03 19 48.1599902040 +41 30 42.108850836   13.10 12.48 11.09   ~ 4008 3
14 3C 88 QSO 03 27 54.19499480 +02 33 41.9824262   13.95       ~ 222 1
15 Z 541-15 rG 03 29 23.8863408096 +39 47 31.958110536   14.9       ~ 96 0
16 4C 39.12 rG 03 34 18.4162545072 +39 21 24.413823900   14.2       ~ 104 1
17 3C 111 Sy1 04 18 21.2772425736 +38 01 35.801359968   19.75 18.05     ~ 951 1
18 IC 2082 IG 04 29 08.1997552056 -53 49 40.208971800   13.9 12.79     ~ 88 1
19 NAME Pic A Sy1 05 19 49.7229323856 -45 46 43.852662732   15.73 15.77 14.85   ~ 666 1
20 ICRF J054236.1+495107 Sy1 05 42 36.13789710 +49 51 07.2337139   18.45 17.80 17.210   ~ 1493 1
21 2MASX J06214330-5241333 AGN 06 21 43.30328 -52 41 33.2978     15.5 19.34   ~ 84 1
22 MCG+05-16-010 AGN 06 52 02.5060831464 +27 27 39.387328884   14.9       ~ 81 1
23 4C 42.22 BLL 06 56 10.66207584 +42 37 02.7512524   15.0 16.90 11.1   ~ 80 1
24 4C 56.16 rG 07 49 48.1 +55 54 19           ~ 172 1
25 NGC 2484 Sy2 07 58 28.10812817 +37 47 11.8076475   14.15 14.9     ~ 268 1
26 Z 150-14 Sy2 08 40 02.336 +29 49 02.73   20.00 19.62     ~ 193 1
27 NAME Hya A LIN 09 18 05.66848602 -12 05 43.8060823   14.38 14.8     ~ 1012 1
28 2MASX J09272355+2955293 rG 09 27 23.5416653040 +29 55 29.521460100           ~ 20 0
29 ICRF J100601.7+345410 Sy2 10 06 01.75023017 +34 54 10.4016113   15.97       ~ 450 2
30 NGC 3563 PaG 11 11 25.30 +26 57 46.3           ~ 6 0
31 NGC 3665 rG 11 24 43.630 +38 45 46.05 13.71 13.26 11.62     ~ 345 1
32 NGC 3862 Sy2 11 45 05.00904503 +19 36 22.7409909   14.98 13.97     ~ 601 3
33 ICRF J114722.1+350107 Sy2 11 47 22.1297825184 +35 01 07.538786184   17.89 16.83 10.26   ~ 174 1
34 NGC 4261 LIN 12 19 23.2160630 +05 49 29.700024   13.92 12.87     ~ 1223 0
35 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7197 3
36 ICRF J124733.3+672316 Sy2 12 47 33.32959326 +67 23 16.4488689           ~ 87 1
37 3C 278 QSO 12 54 38.3 -12 33 27     11.6     ~ 124 3
38 NGC 5090 rG 13 21 12.84471811 -43 42 16.8452073   12.59 11.51 10.84   ~ 200 1
39 NGC 5127 LIN 13 23 45.0315298080 +31 33 56.527040808   13.9       ~ 178 0
40 NGC 5141 Sy2 13 24 51.44109717 +36 22 42.7725745   13.9       ~ 187 1
41 NAME Centaurus A Sy2 13 25 27.61521044 -43 01 08.8050291   8.18 6.84 6.66   ~ 4486 3
42 3C 286 Sy1 13 31 08.2883506368 +30 30 32.960091564   17.51 17.25     ~ 4341 2
43 IC 4296 AGN 13 36 39.03253319 -33 57 57.0730368   11.52 12.99 10.00 10.79 ~ 494 2
44 3C 293.0 BLL 13 52 17.8719816576 +31 26 46.487381604   16.10 15.10     ~ 471 3
45 ICRF J141558.8+132023 Sy2 14 15 58.81751033 +13 20 23.7128587   21.055 20.000 18.461   ~ 437 1
46 MCG+05-35-018 AGN 14 49 27.9240277488 +27 46 50.329531668   15.0       ~ 53 1
47 UGC 9799 Sy2 15 16 44.4893939136 +07 01 17.825410740   15.19 14.17     ~ 446 3
48 3C 321 Sy2 15 31 43.473 +24 04 18.93   16.0   15.40   ~ 326 1
49 IC 4587 LIN 15 59 51.6141497592 +25 56 26.318529096   15.5       ~ 60 1
50 NGC 6166 Sy2 16 28 38.24470063 +39 33 04.2335319   12.78 11.78     ~ 763 5
51 NGC 6251 Sy2 16 32 31.96989253 +82 32 16.3999044 15.24 14.66 12.89 7.62   ~ 727 0
52 ICRF J164416.1-771548 AGN 16 44 16.1207820000 -77 15 48.822593256   15.30 15.5 14.75   ~ 82 1
53 2C 1473 AGN 17 20 28.1680537512 -00 58 46.582453920   15.36       ~ 324 1
54 6C 174400+554318 QSO 17 44 56.60706225 +55 42 17.1610560   13.0 13.5     ~ 77 1
55 3C 371 BLL 18 06 50.6802916920 +69 49 28.109609256   14.77 14.22 11.39   ~ 857 2
56 7C 1815+6125 BLL 18 15 36.79225624 +61 27 11.6475505   21.272   19.122   ~ 39 1
57 ICRF J183503.3+324146 Sy1 18 35 03.3896172576 +32 41 46.855964616   16.50 15.39 10.50   ~ 652 1
58 PKS 1834+19 rG 18 36 39.661 +19 43 45.43   14.8 14     ~ 33 0
59 ICRF J184208.9+794617 Sy1 18 42 08.9904975672 +79 46 17.127835104   16.06 15.38     ~ 1316 0
60 QSO B1946+708 BLL 19 45 53.51966298 +70 55 48.7285673   18.726 16.70 17.199   ~ 139 2
61 3C 403.0 Sy2 19 52 15.7996999344 +02 30 24.238200816   15.42 16.5     ~ 338 1
62 NAME Cyg A Sy2 19 59 28.35656837 +40 44 02.0972325   16.22 15.10     ~ 2368 2
63 NGC 7052 rG 21 18 33.0441963648 +26 26 49.174586196 15.52 14.85 13.09     ~ 323 1
64 ESO 75-41 Sy1 21 57 05.9801262624 -69 41 23.686042524   14.23 13.79 12.94   ~ 279 1
65 LEDA 68751 Sy1 22 23 49.5400938871 -02 06 12.859452336   16.93 15.77 16.02   ~ 484 2
66 UGC 12064 AGN 22 31 20.5885689288 +39 21 29.593072404   14.6       ~ 437 1
67 3C 452 Sy2 22 45 48.7616172744 +39 41 15.906782184   17.60 16.56     ~ 376 1
68 NGC 7720 Sy1 23 38 29.38324020 +27 01 53.2580084   13.9 13.3     ~ 541 4

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