2016MNRAS.462.4197C


C.D.S. - SIMBAD4 rel 1.7 - 2019.11.17CET09:43:51

2016MNRAS.462.4197C - Mon. Not. R. Astron. Soc., 462, 4197-4207 (2016/November-2)

A comparative study of intervening and associated H I 21-cm absorption profiles in redshifted galaxies.

CURRAN S.J., DUCHESNE S.W., DIVOLI A. and ALLISON J.R.

Abstract (from CDS):

The star-forming reservoir in the distant Universe can be detected through H I 21-cm absorption arising from either cool gas associated with a radio source or from within a galaxy intervening the sightline to the continuum source. In order to test whether the nature of the absorber can be predicted from the profile shape, we have compiled and analysed all of the known redshifted (z >= 0.1) H I 21-cm absorption profiles. Although between individual spectra there is too much variation to assign a typical spectral profile, we confirm that associated absorption profiles are, on average, wider than their intervening counterparts. It is widely hypothesized that this is due to high-velocity nuclear gas feeding the central engine, absent in the more quiescent intervening absorbers. Modelling the column density distribution of the mean associated and intervening spectra, we confirm that the additional low optical depth, wide dispersion component, typical of associated absorbers, arises from gas within the inner parsec. With regard to the potential of predicting the absorber type in the absence of optical spectroscopy, we have implemented machine learning techniques to the 55 associated and 43 intervening spectra, with each of the tested models giving a >= 80 per cent accuracy in the prediction of the absorber type. Given the impracticability of follow-up optical spectroscopy of the large number of 21-cm detections expected from the next generation of large radio telescopes, this could provide a powerful new technique with which to determine the nature of the absorbing galaxy.

Abstract Copyright: © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): methods: data analysis - galaxies: active - galaxies: high redshift - galaxies: ISM - quasars: absorption lines - radio lines: galaxies - radio lines: galaxies

VizieR on-line data: <Available at CDS (J/MNRAS/462/4197): table1.dat table2.dat>

Simbad objects: 103

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Number of rows : 103

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 ICRF J002549.1-260212 SyG 00 25 49.15626788 -26 02 12.6149312   20.30 19.5 18.084   ~ 137 1
2 4C -01.06 QSO 01 08 26.8415994674 -00 37 24.167309265   18.11 17.82     ~ 98 1
3 QSO B0108+388 Bla 01 11 37.31680 +39 06 28.1039     22 22.000   ~ 231 1
4 QSO B0132-097 QSO 01 34 35.66662046 -09 31 02.8787711   24.52 22.70 20.80   ~ 94 1
5 3C 49 rG 01 41 09.10 +13 53 28.0   22.327 20.920 20.876   ~ 169 1
6 QSO B0201+113 QSO 02 03 46.65705872 +11 34 45.4095674   19.5 19.5 19.41   ~ 177 1
7 QSO B0218+357 QSO 02 21 05.5 +35 56 14   20.0 20.0 19.60   ~ 489 3
8 QSO B0235+1624 BLL 02 38 38.93010 +16 36 59.2746   16.46 15.50 15.92   ~ 1367 2
9 QSO B0237-2322 QSO 02 40 08.1742481040 -23 09 15.727160394   16.78 16.63     ~ 467 0
10 QSO B0248+430 QSO 02 51 34.53674204 +43 15 15.8291997     18.0 13.72   ~ 186 1
11 3C 82 QSO 03 14 44.2 +43 14 04     21.0     ~ 41 2
12 ICRF J031857.8+162832 AGN 03 18 57.80262301 +16 28 32.6981890     22.0     ~ 186 1
13 ICRF J041045.6+765645 AGN 04 10 45.61081971 +76 56 45.3105471   21 22.0 21.200   ~ 142 1
14 4C 05.19 QSO 04 14 37.76781859 +05 34 42.3354282   24.100 23.800 21.270   ~ 321 2
15 PKS 0428+205 rG 04 31 03.76136151 +20 37 34.2649550   22.174   19.085   ~ 164 1
16 QSO B0438-43 QSO 04 40 17.1805718498 -43 33 08.609959495   19.31 19.5 18.2   ~ 246 1
17 QSO J0457-2324 QSO 04 57 03.1792314200 -23 24 52.020969479   18.85 18.5 16.56   ~ 321 1
18 4C -02.19 QSO 05 01 12.80988366 -01 59 14.2562534   19.1 18.4 19.04   ~ 505 1
19 ICRF J050321.1+020304 Sy2 05 03 21.19717510 +02 03 04.6763382   22.500 21.350 20.682   ~ 170 1
20 ICRF J074110.7+311200 Sy1 07 41 10.7033434 +31 12 00.231016   17.02 16.89 16.322   ~ 401 1
21 3C 190 QSO 08 01 33.5526629491 +14 14 42.815302770   21.07 20.26 18.972   ~ 212 2
22 7C 080134.89+302111.00 QSO 08 04 42.2368689630 +30 12 37.028604612   18.56 18.17     ~ 68 1
23 7C 080458.39+495918.00 QSO 08 08 39.66628353 +49 50 36.5304035   19.55 19.18 18.34   ~ 316 2
24 3C 196 Sy1 08 13 36.056090 +48 13 02.63597   18.36 17.79     ~ 470 2
25 7C 082754.29+242103.00 QSO 08 30 52.08619070 +24 10 59.8204032   17.62 17.26 16.30   ~ 452 1
26 ICRF J083454.9+553421 Sy2 08 34 54.90395243 +55 34 21.0703658   20.75 19.45 17.180   ~ 246 2
27 NVSS J084307+453743 rG 08 43 07.09424901 +45 37 42.8974945           ~ 17 1
28 ICRF J084957.9+510829 Sy1 08 49 57.97682961 +51 08 29.0234509   19.37 18.78 17.79   ~ 187 2
29 QSO J0850+5159 QSO 08 50 42.2442415678 +51 59 11.651027176   19.92 19.41     ~ 37 1
30 QSO J0852+3435 QSO 08 52 44.7399141702 +34 35 40.528091733   20.42 19.70     ~ 29 1
31 3C 213.1 AGN 09 01 05.258 +29 01 46.93   18.84 18.08 18.600   ~ 113 1
32 87GB 085914.2+031623 G 09 01 50.966 +03 04 23.00     19.0     ~ 7 1
33 NVSS J090530+340756 rG 09 05 30.1 +34 07 57   24.0 23.800 23.500   ~ 150 1
34 ICRF J090933.4+425346 Sy2 09 09 33.49711097 +42 53 46.4818256   19.98 19.42 18.220   ~ 455 0
35 87GB 091749.4+272654 G 09 20 45.048 +27 14 06.73     17.8     ~ 8 1
36 6C 092718+465740 QSO 09 30 35.0817110106 +46 44 08.656181176   19.11 18.89 17.7   ~ 50 1
37 NVSS J094221+062334 EmG 09 42 21.980 +06 23 35.24           ~ 7 0
38 QSO B0952+179 QSO 09 54 56.82361250 +17 43 31.2222114   17.31 17.23     ~ 189 1
39 ICRF J100601.7+345410 Sy1 10 06 01.75030199 +34 54 10.4005583   15.97       ~ 402 2
40 5C 2.56 QSO 10 58 13.0466472424 +49 39 36.057061487   19.87 19.71     ~ 74 1
41 QSO B1107-187 QSO 11 10 00.40688328 -18 58 48.7441658   22.44 21.10     ~ 32 0
42 NVSS J112030+273611 rG 11 20 30.049 +27 36 10.75           ~ 7 1
43 3C 258 rG 11 24 43.693 +19 19 28.11   22.082 21.448 20.513   ~ 80 1
44 87GB 112616.9+565506 G 11 29 04.114 +56 38 44.11           ~ 4 2
45 QSO J1130-1449 QSO 11 30 07.05259287 -14 49 27.3881476   17.17 16.90 16 16.97 ~ 611 1
46 4C 05.52 QSO 11 45 21.31518022 +04 55 26.6888184   19.69 19.26 18.67   ~ 80 1
47 7C 114722.00+554500.00 Bla 11 50 00.1 +55 28 21       14.3   ~ 16 1
48 QSO B1157+014 QSO 11 59 44.8277890111 +01 12 06.984367162   17.87 17.52     ~ 194 1
49 2MASX J12023112+1637414 EmG 12 02 31.129 +16 37 41.80           ~ 7 1
50 3C 268.3 Sy1 12 06 24.9 +64 13 38   21.847 20.790 19.910   ~ 178 1
51 B3 1206+469 Rad 12 08 56.30 +46 41 06.0           ~ 3 1
52 4C -02.55 QSO 12 32 00.0157879377 -02 24 04.790684994   17.41 17.06 16.4   ~ 372 1
53 QSO J1246-0730 QSO 12 46 04.23210358 -07 30 46.5745473   17.6 18.0 18.2   ~ 161 1
54 7C 124448.89+491639.00 Sy2 12 47 07.3181357171 +49 00 17.902756857   20.08 19.20     ~ 35 1
55 7C 125007.79+444355.00 QSO 12 52 27.0691927392 +44 27 37.924659198   19.28 18.95     ~ 19 1
56 NVSS J125433+185602 rG 12 54 33.2705564623 +18 56 01.926779482   17.70       ~ 14 1
57 ICRF J130132.6+463402 Sy2 13 01 32.60627648 +46 34 02.9397625   19.86 18.94 14.64   ~ 28 1
58 4C 32.44 QSO 13 26 16.51232948 +31 54 09.5144454   21.367 19.822 18.882   ~ 151 1
59 3C 286 Sy1 13 31 08.2885060664 +30 30 32.960825108   17.51 17.25     ~ 3618 1
60 QSO B1331+170 QSO 13 33 35.7826224 +16 49 04.014213   16.84 16.71 16.41   ~ 402 1
61 QSO J1337+3152 QSO 13 37 24.6934 +31 52 54.734   19.40 19.01     ~ 36 0
62 ICRF J134733.3+121724 Sy2 13 47 33.36161542 +12 17 24.2402572   19.28 18.44 15.718   ~ 520 3
63 NVSS J135740+435400 rG 13 57 40.59226022 +43 53 59.7686434     22.708 20.951   ~ 36 1
64 PKS 1355+01 Q? 13 57 53.718 +00 46 33.39           ~ 20 1
65 ICRF J140028.6+621038 Sy2 14 00 28.64868162 +62 10 38.5884658   22.137 20.373 19.530   ~ 155 1
66 QSO B1406-076 QSO 14 08 56.48120036 -07 52 26.6664200   20.3 18.4     ~ 255 1
67 87GB 140732.1+361738 Sy1 14 09 42.448 +36 04 15.91           ~ 16 1
68 NAME Circinus Galaxy Sy2 14 13 09.906 -65 20 20.47   10.89 9.84 10.6 10.0 ~ 969 2
69 QSO B1413+135 BLL 14 15 58.81750938 +13 20 23.7129069   21.055 20.000 18.461   ~ 368 1
70 FIRST J142210.8+210554 rG 14 22 10.812 +21 05 54.11           ~ 6 0
71 6C 142922+400626 QSO 14 31 20.5384064980 +39 52 41.530711382   16.97 16.65 16.07   ~ 56 1
72 QSO B1430-178 QSO 14 32 57.69062238 -18 01 35.2486238   17.8 19.5 18.4   ~ 80 1
73 87GB 144031.3+022651 QSO 14 43 04.5338344301 +02 14 19.320344006           ~ 9 1
74 ICRF J150609.5+373051 Sy2 15 06 09.52996778 +37 30 51.1325044   21.2 21.2 20.60   ~ 151 1
75 [VV96] J154508.5+475155 QSO 15 45 08.52982479 +47 51 54.6640193   22.50 21.76 20.80   ~ 37 1
76 QSO B1549-790 QSO 15 56 58.86989203 -79 14 04.2815029   18.80 18.800 17.84   ~ 172 1
77 4C 52.37 Sy1 16 02 46.443 +52 43 58.15   18.50 17.76     ~ 25 1
78 7C 1603+6059 G 16 04 27.400 +60 50 55.40           ~ 5 0
79 87GB 161434.7+265426 G 16 16 38.327 +26 47 01.34           ~ 12 1
80 4C 23.43 Sy1 16 24 39.0836869355 +23 45 12.221830474   17.91 17.47     ~ 314 1
81 4C 12.59 QSO 16 31 45.24690 +11 56 02.9910   18.38 18.40     ~ 109 1
82 PKS 1649-062 rG 16 51 41.1 -06 18 14   23.0       ~ 21 1
83 2MASX J17185436+5441486 Sy2 17 18 54.2347 +54 41 47.464           ~ 71 1
84 7C 1755+5749 QSO 17 56 03.6268378209 +57 48 47.986168938     18.00 18.4   ~ 44 1
85 [VV96] J181536.8+612711 BLL 18 15 36.7901690411 +61 27 11.626463363   21.272   19.122   ~ 28 1
86 ICRF J181623.9+345745 Sy2 18 16 23.90081352 +34 57 45.7487759   20.342   18.459   ~ 23 1
87 4C 39.56 Sy1 18 21 20.8982144196 +39 42 44.861498005   19.598   18.135   ~ 60 1
88 QSO B1830-211 QSO 18 33 39.92 -21 03 39.9     18.70 21   ~ 536 6
89 QSO B1850+402 QSO 18 52 30.3721928510 +40 19 06.602677204   18.5 18.5 19.02   ~ 50 1
90 NVSS J194431+544807 rG 19 44 31.51263486 +54 48 07.0629378   21.732   18.591   ~ 57 1
91 QSO B1946+708 Bla 19 45 53.51992731 +70 55 48.7321708   18.726 16.70 17.199   ~ 124 2
92 4C -02.79 QSO 20 06 08.4471529942 -02 23 34.972894759     19     ~ 49 1
93 QSO B2029+121 BLL 20 31 54.99427114 +12 19 41.3403129     18.5 17.42   ~ 123 1
94 4C 18.61 QSO 20 41 24.0679543065 +18 55 01.715278539     20.00     ~ 15 1
95 ICRF J205252.0+363535 Sy2 20 52 52.05498177 +36 35 35.3005039   22.083   21.200   ~ 87 1
96 2MASX J21234458+2504272 Sy2 21 23 44.582 +25 04 27.23   17.660 16.350     ~ 297 0
97 3C 455.0 Sy2 22 55 03.9 +13 13 35   19.535 19.590 19.190   ~ 185 2
98 [VV98] J225504.2-084404 QSO 22 55 04.23979 -08 44 04.0213       20.5   ~ 40 1
99 2C 1883 Sy2 23 16 35.1925435787 +04 05 18.292942690   17.54 16.68 17.220   ~ 271 1
100 QSO J2340-0053 QSO 23 40 23.6702895509 -00 53 26.997605159   18.26 17.93     ~ 74 0
101 4C 45.51 QSO 23 54 21.68022839 +45 53 04.2365363   20.6 20.6 19.1   ~ 193 1
102 ICRF J235509.4+495008 Sy2 23 55 09.45814510 +49 50 08.3395036   21.101   18.400   ~ 243 1
103 QSO J2358-1020 QSO 23 58 10.88240761 -10 20 08.6113211   19.16 18.91 18.00   ~ 109 0

    Equat.    Gal    SGal    Ecl

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2019.11.17-09:43:51

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