2007MNRAS.381L...6C

Query : 2007MNRAS.381L...6C

2007MNRAS.381L...6C - Mon. Not. R. Astron. Soc., 381, L6-L10 (2007/October-2)

Detection of broad 21-cm absorption at zabs= 0.656 in the complex sight-line towards 3C336.

CURRAN S.J., TZANAVARIS P., MURPHY M.T., WEBB J.K. and PIHLSTROM Y.M.

Abstract (from CDS):

We report the detection of 21-cm absorption at zabs= 0.656 towards 1622+238 (3C336). The line is very broad with a full width to half-maximum of 235 km/s, giving a velocity-integrated optical depth of. The centroid of the line is offset from that of the known damped Lyman α absorption system (DLA) by 50 km/s, and if the Lyman α and 21-cm absorption are due to the same gas, we derive a spin temperature of Ts≤ 60 K, which would be the lowest yet in a DLA. The wide profile, which is over four times wider than that of any other DLA, supports the hypothesis that the hydrogen absorption is occurring either in the disc of a large underluminous spiral or in a group of dim unidentified galaxies, associated with the single object which has been optically identified at this redshift.

Abstract Copyright: 2007 The Authors. Journal compilation © 2007 RAS

Journal keyword(s): galaxies: individual: 3C336 - galaxies: ISM - quasars: absorption lines - cosmology: observations - early Universe

CDS comments: The galaxy "z=0.656 galaxy" is [SDM97] 26 in Simbad

Simbad objects: 23

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Number of rows : 23
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 3C 48 QSO 01 37 41.2996631208 +33 09 35.080388820   16.62 16.20     ~ 2924 2
3 QSO B0201+113 Bla 02 03 46.65705710 +11 34 45.4094619   19.5 19.5 19.41   ~ 216 1
4 QSO B0235+1624 BLL 02 38 38.93010450 +16 36 59.2745528   16.46 15.50 15.92   ~ 1614 2
5 YYG A G 02 38 38.94 +16 36 57.4   20.31       ~ 38 0
6 6C 024820+430300 Bla 02 51 34.53674154 +43 15 15.8292024     18.0 13.72   ~ 221 1
7 QSO B0438-43 Bla 04 40 17.17997576 -43 33 08.6043290   19.31 19.5 18.2   ~ 302 2
8 4C -02.19 Bla 05 01 12.80988538 -01 59 14.2564557   19.1 18.06 19.04   ~ 624 1
9 6C 073759+311929 Bla 07 41 10.70330407 +31 12 00.2291151   17.02 16.89 16.322   ~ 468 1
10 3C 196 Sy1 08 13 36.0561170112 +48 13 02.644966020   18.36 17.79     ~ 578 2
11 7C 082754.29+242103.00 Bla 08 30 52.08619250 +24 10 59.8202919   17.62 17.26 16.30   ~ 563 1
12 SDSS J083052.50+241101.9 G 08 30 52.44800 +24 11 01.1197   20.64       ~ 18 0
13 QSO B0952+179 QSO 09 54 56.82361677 +17 43 31.2221518   17.31 17.23     ~ 222 1
14 QSO J1130-1449 Bla 11 30 07.0523452128 -14 49 27.388021944   17.17 16.90 16 16.97 ~ 739 1
15 QSO B1157+014 QSO 11 59 44.8278142392 +01 12 06.985999764   17.87 17.52     ~ 228 1
16 [KGH2007] 6 G 12 17 51 +14 46.5           ~ 56 0
17 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
18 4C -02.55 Bla 12 32 00.0159535440 -02 24 04.793069304   17.41 17.06 16.4   ~ 440 1
19 3C 286 Sy1 13 31 08.2883506368 +30 30 32.960091564   17.51 17.25     ~ 4558 2
20 4C 23.43 Bla 16 24 39.0838297968 +23 45 12.223370412   17.91 17.47     ~ 343 1
21 [SDM97] 26 G 16 24 39.2 +23 45 26   22.55   22.7   ~ 7 0
22 4C 12.59 QSO 16 31 45.1708807968 +11 56 03.203387592   18.38 18.40     ~ 122 1
23 6C 235150+453621 Bla 23 54 21.68022501 +45 53 04.2365520   20.6 20.60 19.1   ~ 252 1

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