2002A&A...382..838K


Query : 2002A&A...382..838K

2002A&A...382..838K - Astronomy and Astrophysics, volume 382, 838-842 (2002/2-2)

A new 21-cm absorber identified with an L∼L* galaxy.

KANEKAR N., ATHREYA R.M. and CHENGALUR J.N.

Abstract (from CDS):

We present Giant Metrewave Radio Telescope (GMRT) observations of redshifted 21-cm absorption from the z=0.437 metal line absorption system towards PKS 1243-072. HI absorption is clearly detected; the absorption profile has a velocity spread of ∼20km/s. Detection of 21-cm absorption indicates that the absorber has an HI column density large enough to be classified as a damped Lyman-α system. Follow up ground based optical imaging and spectroscopy allow us to identify the absorber with an L ∼L* galaxy at an impact parameter of ∼9.8 kpc from the line of sight to the QSO. The absorbing galaxy is unusual in that it has bright emission lines. On the basis of the optical spectrum we are unable to uniquely classify the galaxy since its emission line ratios lie in the transition region between starburst and Seyfert II type spectra.

Abstract Copyright:

Journal keyword(s): galaxies: evolution: - galaxies: formation: - galaxies: ISM - cosmology: observations - lines: galaxies radio

Nomenclature: Fig.2: [KAC2002] A (No. A).

Simbad objects: 4

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Number of rows : 4
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 ICRF J054236.1+495107 Sy1 05 42 36.1380355416 +49 51 07.232213736   18.45 17.80 17.210   ~ 1393 1
2 QSO J1130-1449 QSO 11 30 07.0523452128 -14 49 27.388021944   17.17 16.90 16 16.97 ~ 663 1
3 QSO J1246-0730 QSO 12 46 04.2323029752 -07 30 46.575886284   17.6 18.0 18.2   ~ 175 1
4 [KAC2002] A EmG 12 46 04.33 -07 30 48.1           ~ 3 0

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2022.08.15-14:19:17

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