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 - 2026 		#notes
1 3C 15 SyG 00 37 04.1107321824 -01 09 08.407668996   15.34       ~ 232 1
2 Z 384-48 rG 00 57 34.90446247 -01 23 27.5469897   14.07 15.10     ~ 269 1
3 NGC 315 LIN 00 57 48.88334410 +30 21 08.8119345 12.80 12.20 11.16 11.26   ~ 869 2
4 NGC 383 AGN 01 07 24.9647814840 +32 24 45.132586200   13.6 12.14     ~ 821 3
5 NGC 547 rG 01 26 00.6208982520 -01 20 42.432452268   13.16 13.34     ~ 363 4
6 3C 48 QSO 01 37 41.2996631208 +33 09 35.080388820   16.62 16.20     ~ 2924 2
7 Z 522-118 rG 02 09 38.5601991144 +35 47 50.778945420   14.9 13.0     ~ 154 2
8 Z 538-57 Sy1 02 23 11.41124925 +42 59 31.3853324   15.71 14.81     ~ 582 2
9 NGC 1167 LIN 03 01 42.3322774176 +35 12 20.300948892   13.84 12.77     ~ 382 1
10 NGC 1218 Sy1 03 08 26.22380005 +04 06 39.3007808   12.84       ~ 413 0
11 QSO B0309+411 Bla 03 13 01.96212044 +41 20 01.1834497   18.0   14.59   ~ 178 1
12 ACO 426 ClG 03 19 47.6 +41 30 54           ~ 2508 1
13 NGC 1275 Bla 03 19 48.1599902040 +41 30 42.108850836   13.10 12.48 11.09   ~ 4243 3
14 Z 390-93 QSO 03 27 54.19499480 +02 33 41.9824262   13.95       ~ 230 1
15 Z 541-15 rG 03 29 23.8863408096 +39 47 31.958110536   14.9       ~ 99 0
16 Z 525-41 rG 03 34 18.4162545072 +39 21 24.413823900   14.2       ~ 109 1
17 3C 111 Sy1 04 18 21.2772425736 +38 01 35.801359968   19.75 18.05     ~ 1002 2
18 IC 2082 rG 04 29 08.1997552056 -53 49 40.208971800   13.9 12.79     ~ 91 1
19 ESO 252-18A Sy1 05 19 49.7229323856 -45 46 43.852662732   15.73 15.77 14.85   ~ 714 0
20 ICRF J054236.1+495107 Sy1 05 42 36.13789710 +49 51 07.2337139   18.45 17.80 17.210   ~ 1573 1
21 PKS 0620-526 rG 06 21 43.30328 -52 41 33.2978     15.5 19.34   ~ 92 1
22 Z 145-17 Sy2 06 52 02.5060831464 +27 27 39.387328884   14.9       ~ 83 1
23 4C 42.22 BLL 06 56 10.66207584 +42 37 02.7512524   15.0 16.90 11.1   ~ 90 1
24 4C 56.16 rG 07 49 48.077 +55 54 19.45           ~ 176 1
25 NGC 2484 Sy2 07 58 28.10812817 +37 47 11.8076475   14.15 14.9     ~ 284 1
26 Z 150-14 Sy2 08 40 02.336 +29 49 02.73   20.00 19.62     ~ 209 1
27 MCG-02-24-007 LIN 09 18 05.66848602 -12 05 43.8060823   14.38 14.8     ~ 1077 1
28 2MASX J09272355+2955293 rG 09 27 23.5416653040 +29 55 29.521460100           ~ 22 0
29 3C 236.0 BLL 10 06 01.75023017 +34 54 10.4016113   15.97       ~ 473 2
30 NGC 3563 PaG 11 11 25.30 +26 57 46.3           ~ 6 0
31 NGC 3665 GiG 11 24 43.630 +38 45 46.05 13.71 13.26 11.62     ~ 364 1
32 NGC 3862 Sy2 11 45 05.00904503 +19 36 22.7409909   14.98 13.97     ~ 646 1
33 Z 186-48 BLL 11 47 22.1297825184 +35 01 07.538786184   17.89 16.83 10.26   ~ 184 1
34 NGC 4261 LIN 12 19 23.2160630 +05 49 29.700024   13.92 12.87     ~ 1290 0
35 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7815 3
36 ICRF J124733.3+672316 Bla 12 47 33.32959326 +67 23 16.4488689           ~ 100 2
37 3C 278 QSO 12 54 36.96 -12 33 31.8     11.6     ~ 125 3
38 NGC 5090 rG 13 21 12.84471811 -43 42 16.8452073   12.59 11.51 10.84   ~ 208 1
39 NGC 5127 LIN 13 23 45.0315298080 +31 33 56.527040808   13.9       ~ 183 0
40 NGC 5141 Sy2 13 24 51.44109717 +36 22 42.7725745   13.9       ~ 192 1
41 NAME Centaurus A BLL 13 25 27.61521044 -43 01 08.8050291   8.18 6.84 6.66   ~ 4774 3
42 3C 286 Sy1 13 31 08.2883506368 +30 30 32.960091564   17.51 17.25     ~ 4558 2
43 IC 4296 rG 13 36 39.03253319 -33 57 57.0730368   11.52 12.99 10.00 10.79 ~ 520 2
44 Z 162-21 BLL 13 52 17.8719816576 +31 26 46.487381604   16.10 15.10     ~ 502 3
45 QSO B1413+135 BLL 14 15 58.81751033 +13 20 23.7128587   21.055 20.000 18.461   ~ 476 1
46 Z 164-31 rG 14 49 27.9240277488 +27 46 50.329531668   15.0       ~ 59 1
47 Z 49-90 Sy2 15 16 44.4893939136 +07 01 17.825410740   15.19 14.17     ~ 463 4
48 3C 321 Sy1 15 31 43.46520 +24 04 18.9948   16.0   15.40   ~ 341 1
49 IC 4587 LIN 15 59 51.6141497592 +25 56 26.318529096   15.5       ~ 72 1
50 NGC 6166 Sy2 16 28 38.24470063 +39 33 04.2335319   12.78 11.78     ~ 793 2
51 NGC 6251 Bla 16 32 31.96989253 +82 32 16.3999044 15.24 14.66 12.89 7.62   ~ 772 1
52 PKS 1637-77 rG 16 44 16.1207820000 -77 15 48.822593256   15.30 15.5 14.75   ~ 86 1
53 4C -00.67 Sy2 17 20 28.1680537512 -00 58 46.582453920   15.36       ~ 345 1
54 NGC 6454 AGN 17 44 56.60706225 +55 42 17.1610560   13.0 13.5     ~ 83 1
55 Z 340-35 BLL 18 06 50.6802916920 +69 49 28.109609256   14.77 14.22 11.39   ~ 909 1
56 7C 1815+6125 BLL 18 15 36.79225624 +61 27 11.6475505   21.272   19.122   ~ 44 1
57 Z 173-14 Sy1 18 35 03.3896172576 +32 41 46.855964616   16.50 15.39 10.50   ~ 688 1
58 Z 114-17 rG 18 36 39.661 +19 43 45.43   14.8 14     ~ 35 0
59 3C 390.3 Bla 18 42 08.9904975672 +79 46 17.127835104   16.06 15.38     ~ 1381 1
60 QSO B1946+708 BLL 19 45 53.51966298 +70 55 48.7285673   18.726 16.70 17.199   ~ 147 2
61 3C 403.0 Sy2 19 52 15.7996999344 +02 30 24.238200816   15.42 16.5     ~ 353 1
62 MCG+07-41-003 Bla 19 59 28.35656837 +40 44 02.0972325   16.22 15.10     ~ 2537 2
63 NGC 7052 rG 21 18 33.0441963648 +26 26 49.174586196 15.52 14.85 13.09     ~ 348 1
64 ESO 75-41 BLL 21 57 05.9801262624 -69 41 23.686042524   14.23 13.79 12.94   ~ 299 1
65 LEDA 68751 Sy1 22 23 49.5398449645 -02 06 12.856394895   16.93 15.77 16.02   ~ 511 2
66 Z 514-50 SyG 22 31 20.5885689288 +39 21 29.593072404   14.6       ~ 446 1
67 3C 452 Sy2 22 45 48.7616172744 +39 41 15.906782184   17.60 16.56     ~ 391 1
68 NGC 7720 Sy1 23 38 29.38324020 +27 01 53.2580084   13.9 13.3     ~ 565 4

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