Astronomy and Astrophysics – Astrophysics – Cosmology and Extragalactic Astrophysics
Scientific paper
2012-04-12
Astronomy and Astrophysics
Astrophysics
Cosmology and Extragalactic Astrophysics
Accepted for publishing in MNRAS letter
Scientific paper
Recently, the number of detected galaxy counterparts of z > 2 Damped Lyman-alpha Absorbers in QSO spectra has increased substantially so that we today have a sample of 10 detections. M{\o}ller et al. in 2004 made the prediction, based on a hint of a luminosity-metallicity relation for DLAs, that HI size should increase with increasing metallicity. In this paper we investigate the distribution of impact parameter and metallicity that would result from the correlation between galaxy size and metallicity. We compare our observations with simulated data sets given the relation of size and metallicity. The observed sample presented here supports the metallicity-size prediction: The present sample of DLA galaxies is consistent with the model distribution. Our data also show a strong relation between impact parameter and column density of HI. We furthermore compare the observations with several numerical simulations and demonstrate that the observations support a scenario where the relation between size and metallicity is driven by feedback mechanisms controlling the star-formation efficiency and outflow of enriched gas.
Christensen Lars Lindberg
Fynbo Johan P. U.
Krogager Jens-Kristian
Ledoux Cedric
Milvang-Jensen B.
No associations
LandOfFree
On the sizes of z>2 Damped Lyman-alpha Absorbing Galaxies does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with On the sizes of z>2 Damped Lyman-alpha Absorbing Galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On the sizes of z>2 Damped Lyman-alpha Absorbing Galaxies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-142827