2007A&A...468..587C


Query : 2007A&A...468..587C

2007A&A...468..587C - Astronomy and Astrophysics, volume 468, 587-601 (2007/6-3)

An integral field spectroscopic survey for high redshift damped Lyman-α galaxies.

CHRISTENSEN L., WISOTZKI L., ROTH M.M., SANCHEZ S.F., KELZ A. and JAHNKE K.

Abstract (from CDS):

We search for galaxy counterparts to damped Lyman-α absorbers (DLAs) at z>2 towards nine quasars, which have 14 DLAs and 8 sub-DLAs in their spectra. We use integral field spectroscopy to search for Lyα emission line objects at the redshifts of the absorption systems. Besides recovering two previously confirmed objects, we find six statistically significant candidate Lyα emission line objects. The candidates are identified as having wavelengths close to the DLA line where the background quasar emission is absorbed. In comparison with the six currently known Lyα emitting DLA galaxies the candidates have similar line fluxes and line widths, while velocity offsets between the emission lines and systemic DLA redshifts are larger. The impact parameters are larger than 10kpc, and lower column density systems are found at larger impact parameters. Assuming that a single gas cloud extends from the QSO line of sight to the location of the candidate emission line, we find that the average candidate DLA galaxy is surrounded by neutral gas with an exponential scale length of ∼5kpc.

Abstract Copyright:

Journal keyword(s): galaxies: formation - galaxies: high-redshift - galaxies: quasars: absorption lines

Simbad objects: 9

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Number of rows : 9
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 PHL 1222 QSO 01 53 53.8926173376 +05 02 57.118052184   18.04 17.63     ~ 109 0
2 QSO B0953+47 QSO 09 56 25.1645972520 +47 34 42.468198132     19.47     ~ 62 1
3 QSO B1347+112 QSO 13 49 53.3311780008 +11 01 15.766338900     18.5     ~ 33 0
4 QSO B1425+606 QSO 14 26 56.1849081360 +60 25 50.813373324   16.82 16.54     ~ 133 0
5 QSO B1451+123 QSO 14 54 18.5811696336 +12 10 53.897535696     18.6     ~ 80 0
6 QSO B1759+7539 BLL 17 57 46.3590423768 +75 39 16.181909928     16.50     ~ 83 0
7 QSO J1802+5616 QSO 18 02 48.8363975640 +56 16 50.442963780     18.30     ~ 24 0
8 QSO J2155+1358 QSO 21 55 02.0017063296 +13 58 25.712205816     18.00     ~ 43 0
9 QSO J2236+1326 QSO 22 36 19.1931471480 +13 26 20.317350876   19.15 18.69     ~ 108 0

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2022.05.28-23:17:56

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