2003A&A...412L..29K


C.D.S. - SIMBAD4 rel 1.7 - 2021.06.16CEST00:50:27

2003A&A...412L..29K - Astronomy and Astrophysics, volume 412, L29-32 (2003/12-3)

HI absorption in a gravitational lens at z ∼ 0.7645.

KANEKAR N. and BRIGGS F.H.

Abstract (from CDS):

We have used the Westerbork Synthesis Radio Telescope to detect HI 21 cm absorption at z∼0.7645 in the gravitational lens system towards PMN J0134-0931. The 21cm profile has two broad components, with peak optical depths of 0.047±0.007 and 0.039±0.007, at heliocentric redshifts 0.76470±0.00006 and 0.76348±0.00006, respectively. The redshift of the stronger component matches that of CaII H and K absorption detected earlier. The absorption has a total velocity width of ∼500km/s (between nulls) and an equivalent width of 7.1±0.08km/s. This would imply a total HI column density of 2.6±0.3x1021/cm2, for a spin temperature of 200K and a covering factor of unity. The high estimated HI column density is consistent with the presence of large amounts of dust at the lens redshift; the intervening dust could be responsible for the extremely red colour of the background quasar.

Abstract Copyright:

Journal keyword(s): galaxies: individual: PMN J0134-0931 - gravitational lensing - radio lines - ISM

Simbad objects: 13

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Number of rows : 13

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 [WLC2002] J0134-0931 B LeQ 01 34 35.6188 -09 31 03.137           ~ 6 0
2 [WLC2002] J0134-0931 A LeQ 01 34 35.6249 -09 31 03.288           ~ 6 0
3 [WLC2002] J0134-0931 C LeQ 01 34 35.6320 -09 31 03.255           ~ 6 0
4 [WLC2002] J0134-0931 E LeQ 01 34 35.6464 -09 31 03.506           ~ 6 0
5 QSO B0132-097 QSO 01 34 35.6616718 -09 31 03.004141   24.52 22.70 20.80   ~ 100 1
6 [WLC2002] J0134-0931 D LeQ 01 34 35.6669 -09 31 02.873           ~ 6 0
7 3C 48 QSO 01 37 41.2995845985 +33 09 35.079126038   16.62 16.20     ~ 2592 2
8 QSO B0218+357 QSO 02 21 05.5 +35 56 14   20.0 20.0 19.60   ~ 515 2
9 ICRF J052109.8+163822 Sy1 05 21 09.88592749 +16 38 22.0517668   19.37 18.84 18.480   ~ 771 1
10 ICRF J054236.1+495107 Sy1 05 42 36.13789843 +49 51 07.2337251   18.45 17.80 17.210   ~ 1318 1
11 QSO B1359+154 QSO 14 01 35.588 +15 13 24.15     21.90     ~ 70 1
12 QSO B1830-211 Bla 18 33 39.92 -21 03 39.9     18.70 21   ~ 573 1
13 3C 454.3 Bla 22 53 57.74798 +16 08 53.5611   16.57 16.10 15.22   ~ 2584 2

    Equat.    Gal    SGal    Ecl

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2021.06.16-00:50:27

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