2011ApJ...727...52B

Query : 2011ApJ...727...52B

2011ApJ...727...52B - Astrophys. J., 727, 52 (2011/January-3)

A Green Bank Telescope survey for H I 21 cm absorption in the disks and halos of low-redshift galaxies.

BORTHAKUR S., TRIPP T.M., YUN M.S., BOWEN D.V., MEIRING J.D., YORK D.G. and MOMJIAN E.

Abstract (from CDS):

We present an H I 21 cm absorption survey with the Green Bank Telescope (GBT) of galaxy-quasar pairs selected by combining galaxy data from the Sloan Digital Sky Survey (SDSS) and radio sources from the Faint Images of the Radio Sky at Twenty-Centimeters (FIRST) survey. Our sample consists of 23 sight lines through 15 low-redshift foreground galaxy-background quasar pairs with impact parameters ranging from 1.7 kpc up to 86.7 kpc. We detected one absorber in the GBT survey from the foreground dwarf galaxy, GQ1042+0747, at an impact parameter of 1.7 kpc and another possible absorber in our follow-up Very Large Array (VLA) imaging of the nearby foreground galaxy UGC 7408. The line widths of both absorbers are narrow (FWHM of 3.6 and 4.8 km/s). The absorbers have sub-damped Lyα column densities, and most likely originate in the disk gas of the foreground galaxies. We also detected H I emission from three foreground galaxies including UGC 7408. Although our sample contains both blue and red galaxies, the two H I absorbers as well as the H I emissions are associated with blue galaxies. We discuss the physical conditions in the 21 cm absorbers and some drawbacks of the large GBT beam for this type of survey.

Abstract Copyright: ∼

Journal keyword(s): galaxies: abundances - galaxies: ISM - quasars: absorption lines

Nomenclature: Table 1, col(5): [BTY2011] JHHMMSS.ss+DDMMSS.s N=17.

Simbad objects: 56

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Number of rows : 56
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 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
2 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
3 [BTY2011] J010643.94-103419.3 G 01 06 43.94 -10 34 19.3           ~ 2 1
4 [VV98] J010644.1-103409 Bla 01 06 44.1578365704 -10 34 10.591142088   18.32 18.25 17.6   ~ 53 2
5 3C 48 QSO 01 37 41.2996631208 +33 09 35.080388820   16.62 16.20     ~ 2924 2
6 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
7 ICRF J054236.1+495107 Sy1 05 42 36.13789710 +49 51 07.2337139   18.45 17.80 17.210   ~ 1573 1
8 Z 206-10 AG? 07 28 17.724 +40 46 11.36   15.50       ~ 155 0
9 SDSS J074841.77+173456.6 QSO 07 48 41.7772667520 +17 34 56.654998212   19.74 19.33     ~ 28 1
10 FIRST J074841.7+173512 Rad 07 48 41.786 +17 35 12.20           ~ 1 0
11 FIRST J074842.0+173443 Rad 07 48 42.084 +17 34 43.37           ~ 1 0
12 LEDA 1536218 G 07 48 42.5865670381 +17 34 50.633968212           ~ 3 0
13 UGC 4305 IG 08 19 04.9864630512 +70 43 13.086910452 12.06 11.72 11.39 11.11   ~ 812 2
14 SDSS J082152.84+503128.4 G 08 21 52.8458889624 +50 31 28.437411036           ~ 2 1
15 [BTY2011] J082153.76+503125.7 G 08 21 53.743 +50 31 25.74           ~ 3 1
16 [VV98] J082153.7+503120 Bla 08 21 53.8240193112 +50 31 20.494446024   18.40 18.10     ~ 52 3
17 [BTY2011] J084912.42+275740.4 G 08 49 12.42 +27 57 40.4           ~ 2 1
18 [BTY2011] J084913.80+275735.9 G 08 49 13.80 +27 57 35.9           ~ 1 1
19 2MASS J08491430+2757293 QSO 08 49 14.2711100184 +27 57 29.710456524   19.71 19.34     ~ 25 2
20 [BTY2011] J091010.55+463633.3 G 09 10 10.55 +46 36 33.3           ~ 1 1
21 6C 090650+464835 QSO 09 10 11.0160484416 +46 36 17.806064544   17.64 17.31     ~ 33 2
22 NGC 3067 GiG 09 58 21.0726714528 +32 22 12.012636108   12.7       ~ 255 1
23 [BTY2011] J102257.92+123439.1 G 10 22 57.92 +12 34 39.1           ~ 2 1
24 [VV2006] J102258.4+123429 QSO 10 22 58.4135294280 +12 34 29.708555412   19.31 18.88     ~ 25 2
25 SDSS J104257.52+074900.5 G 10 42 57.524 +07 49 00.53           ~ 2 0
26 [VV2006] J104257.6+074850 QSO 10 42 57.5872587192 +07 48 50.536326600   19.31 19.03     ~ 48 1
27 [BTY2010] GQ J1042+0747 G 10 42 57.76 +07 48 51.6           ~ 10 1
28 PMN J1107+0901 QSO 11 07 36.6108762768 +09 01 14.778072984   19.83 19.33     ~ 28 1
29 SDSS J110736.88+090113.6 G 11 07 36.8810909208 +09 01 13.663431876           ~ 1 0
30 FIRST J115836.8+625415 Rad 11 58 36.882 +62 54 15.06           ~ 1 0
31 FIRST J115837.8+625420 Rad 11 58 37.852 +62 54 20.28           ~ 1 0
32 4C 63.15 Sy1 11 58 39.9098236536 +62 54 27.926538768   17.04 16.78     ~ 80 2
33 [BTY2011] J115840.67+625423.7 G 11 58 40.67 +62 54 23.7           ~ 1 1
34 FIRST J115842.7+625442 Rad 11 58 42.780 +62 54 42.26           ~ 1 0
35 FIRST J122105.4+454838 Rad 12 21 05.480 +45 48 38.80           ~ 2 0
36 6C 121837+460525 BLL 12 21 06.8644146384 +45 48 52.042366692   17.48 17.49     ~ 51 2
37 FIRST J122107.8+454908 Rad 12 21 07.811 +45 49 08.02           ~ 2 0
38 Z 244-7 GiG 12 21 15.01 +45 48 40.8   14.8       ~ 123 2
39 FIRST J125247.5+474042 Rad 12 52 47.588 +47 40 42.81           ~ 1 0
40 [VV2006] J125248.3+474044 QSO 12 52 48.2845839120 +47 40 43.747201200   19.63 19.29     ~ 22 1
41 Z 244-46 G 12 52 49.2228727248 +47 41 06.260290476   15.7       ~ 13 1
42 FIRST J125249.3+474042 Rad 12 52 49.326 +47 40 42.19           ~ 1 0
43 NAME Centaurus A BLL 13 25 27.61521044 -43 01 08.8050291   8.18 6.84 6.66   ~ 4774 3
44 NVSS J132534+495346 Rad 13 25 34.240 +49 53 48.47           ~ 3 1
45 [VV2006] J132534.5+495342 QSO 13 25 34.5722005776 +49 53 41.996053536   20.67 20.45     ~ 25 0
46 LEDA 2356521 G 13 25 35.2 +49 53 23           ~ 4 1
47 [BTY2011] J132839.89+622136.0 G 13 28 39.89 +62 21 36.0           ~ 2 1
48 ICRF J132840.5+622137 Sy1 13 28 40.56423209 +62 21 37.0359699   19.53 19.13     ~ 41 2
49 3C 286 Sy1 13 31 08.2883506368 +30 30 32.960091564   17.51 17.25     ~ 4558 2
50 Z 45-91 G 13 45 25.3032613392 +03 48 23.887442340   15.4       ~ 23 1
51 [VV2006] J134528.8+034719 QSO 13 45 28.7441007384 +03 47 19.678295220   17.6 18.55 18.1   ~ 26 1
52 [BTY2011] J141629.25+372120.4 G 14 16 29.247 +37 21 20.47   16.5       ~ 4 1
53 6C 141424+373513 QSO 14 16 30.6708198648 +37 21 36.846323244   17.7 18.56 17.5   ~ 33 1
54 FIRST J141631.0+372203 Rad 14 16 31.039 +37 22 03.01           ~ 2 0
55 [VV2006] J160658.3+271705 Bla 16 06 58.3003858584 +27 17 05.583450264   19.49 19.22 18.11   ~ 74 2
56 [BTY2011] J160659.13+271642.6 G 16 06 59.136 +27 16 42.64           ~ 3 1

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