Star Formation and Chemical Evolution of DLAs with Semi-Analytical Model

Abstract

We have examined some basic properties of damped Ly$\alpha$ systems(DLAs) by semi-analytic model. We assume that DLA hosts are disk galaxies whose mass function is generated by Press-Schechter formulism at redshift 3. Star formation and chemical evolution undergo in the disc. We select modelled DLAs according to their observational criterion by Monte Carlo simulation using random line of sights and disk inclinations. The DLA ages are set to be 1 to 3 Gyr. By best-fitting the predicted metallicity distribution to the observed ones, we get the effective yield for DLAs about $0.25Z_{\odot }$. On the basis of this constrain, we further compared our model predictions with observations at redshift 3 in the following items: number density; gas content; HI frequency distribution; star formation rate density; relationship between metallicity and HI column density. We found that the predicted number density at redshift 3 agree well with the observed value, but the gas content ${\Omega }_{DLA}$ is about 3 times larger than observed since our model predicts more DLA systems with higher column density. The frequency distribution at higher HI column density is quite consistent with observation while some difference exists at lower HI end. The predicted star formation rate density contributed by DLAs is consistent with the most recent observations. Meanwhile, the connection between DLAs and Lyman Break galaxies(LBGs) is discussed by comparing their UV luminosity functions which shows that the DLAs host galaxies are much fainter than LBGs. However, there is a discrepancy between model prediction and observation in the correlation between metallicity and HI column density for DLAs. Further investigations are needed for the star formation mode at high redshift environments.

arXiv comment6 pages, 3 figures, To appear in "Probing Galaxies through Quasar Absorption Lines", Proceedings IAU Colloquium 199, 2005, Eds. P. R. Williams, C. Shu, and B. Menard

References in corpus (72)

• The Global Schmidt Law in Star Forming Galaxies
• The Formation of Galactic Disks
• Hierarchical Galaxy Formation
• Lyman Break Galaxies at z>4 and the Evolution of the UV Luminosity Density at High Redshift
• The Star Formation History of Field Galaxies
• The CANADA-FRANCE REDSHIFT SURVEY XIII: The luminosity density and star-formation history of the Universe to z ~ 1
• Semi-Analytic Modelling of Galaxy Formation: The Local Universe
• The Relationship Between Gas Content and Star Formation in Molecule-Rich Spiral Galaxies
• The Nature of High-Redshift Galaxies
• Nucleosynthesis of Zinc and Iron-Peak Elements in Pop III Type II Supernovae : Comparison with abundances of Very Metal-Poor Halo Stars
• The Galactic Thick Disk Stellar Abundances
• The Epoch of Galaxy Formation
• Multi-wavelength Observations of Dusty Star Formation at Low and High Redshift
• Abundances at High Redshifts: the Chemical Enrichment History of Damped Lyman-alpha Galaxies
• Chemo-spectrophotometric evolution of spiral galaxies: I. The model and the Milky Way
• On the Kinematics of the Damped Lyman Alpha Protogalaxies
• The Deuterium Abundance Towards Q1009+2956
• The Distribution Of Heavy Elements In Spiral And Elliptical Galaxies
• Mapping the Evolution of High Redshift Dusty Galaxies with Submillimeter Observations of a Radio-Selected Sample
• Damped Lyman alpha absorbers at high redshift -- large disks or galactic building blocks?
• The Age-Metallicity Relation of the Universe in Neutral Gas: The First 100 Damped Lya Systems
• The Metallicity of High Redshift Galaxies: The Abundance of Zinc in 34 Damped Lyman Alpha Systems from z = 0.7 to 3.4
• A Model of Supernovae Feedback in Galaxy Formation
• The density profile of equilibrium and non-equilibrium dark matter halos
• The VLT-UVES survey for molecular hydrogen in high-redshift damped Lyman-alpha systems
• Surveys for z > 3 Damped Lyman-alpha Absorption Systems
• The evolution of Omega(HI) and the epoch of formation of damped Lyman-alpha absorbers
• The UCSD HIRES/KeckI Damped Lya Abundance Database: II. The Implications
• The CORALS Survey I: New Estimates of the Number Density and Gas Content of Damped Lyman Alpha Systems Free from Dust Bias
• Dust in High Redshift Galaxies
• A physical upper limit on the HI column density of gas clouds
• Protogalactic Disk Models of Damped Lya Kinematics
• Are high-redshift DLA galxies Lyman-break galaxies?
• Sulphur and zinc abundances in Galactic stars and damped Lyman-alpha systems
• The ESI/KeckII Damped Lya Abundance Database
• The Structure and Clustering of Lyman Break Galaxies
• Low-Redshift Damped Lyman Alpha Galaxies Toward the Quasars B2 0827+243, PKS 0952+179, PKS 1127-145, and PKS 1629+120
• The Nature of Damped Ly-alpha Absorbing Galaxies at z<=1--A Photometric Redshift Survey of Damped Ly-alpha Absorbers
• Dust and elemental abundances in Damped Ly alpha absorbers
• CII* Absorption in Damped Lyman Alpha Systems: (II) A New Window on the Star Formation History of the Universe
• Modelling the evolution of galaxy clustering
• HST Images of a Galaxy Group at z=2.81, and the Sizes of Damped Lyman Alpha Galaxies
• Star formation rate and metallicity of damped Lyman-alpha absorbers in cosmological SPH simulations
• A comprehensive set of elemental abundances in damped Ly-alpha systems: revealing the nature of these high-redshift galaxies
• Molecular hydrogen at z=1.973 toward Q0013-004: Dust depletion pattern in damped Lyman-alpha systems
• Chemical abundances of Damped Ly alpha systems: A new method for estimating dust depletion effects
• Dependence of Gas Phase Abundances in the ISM on Column Density
• On the Evolution of Damped Lyman Alpha Systems to Galactic Disks
• Simulations of Damped Lyman-Alpha and Lyman Limit Absorbers in Different Cosmologies: Implications for Structure Formation at High Redshift
• Chemical evolution and nature of Damped Lyman-Alpha systems
• Discovery of z=0.0912 and z=0.2212 Damped Lyman-alpha Absorption Line Systems Toward the Quasar OI 363: Limits on the Nature of Damped Lyman-alpha Galaxies
• Metallicity Evolution of Damped Lyman-Alpha Galaxies
• NICMOS Imaging of a Damped Lyman-alpha Absorber at z=1.89 toward LBQS 1210+1731 : Constraints on Size and Star Formation Rate
• Ionized Gas in Damped Lyman Alpha Protogalaxies: II. Comparison Between Models and the Kinematic Data
• On the relation between high-redshift starburst galaxies and damped Ly-alpha systems
• Metallicity Evolution of Damped Lyman Alpha Systems In Lambda CDM Cosmology
• Damped Lyman Alpha Systems and Galaxy Formation
• Testing Cosmological Models Against the Abundance of Damped Lyman-Alpha Absorbers
• The Chemical Uniformity of High z DLA Protogalaxies
• Metallicity in damped Lyman-alpha systems: evolution or bias?
• Damped Lyman alpha systems and galaxy formation models - II. High ions and Lyman limit systems
• A Search for the Damped Ly-alpha Absorber at z=1.86 toward QSO 1244+3443 with NICMOS
• Chemical evolution and depletion pattern in Damped Lyman-alpha (DLA) systems
• The Spatial, Ionization, and Kinematic Conditions of the z=1.39 Damped Ly-alpha Absorber in Q0957+561 A,B
• Clues to the nature of damped Lyman alpha systems from chemical evolution models
• Damped Lyman Alpha Systems at High Redshift and Models of Protogalactic Disks
• A new measurement of zinc metallicity in a DLA at z=3.35
• The Chemical Evolution of the Universe I: High Column Density Absorbers
• Chemical Enrichment in Damped Lyman Alpha Systems From Hierarchical Galaxy Formation Models
• Building Blocks in Hierarchical Clustering Scenarios and their Connection with Damped Ly$\alpha$ Systems
• Dust obscuration studies along quasar sight lines using simulated galaxies
• Star formation and chemical evolution of damped Lyman $\alpha$ systems

Cited by in corpus (3)

• Molecular hydrogen in high-redshift Damped Lyman-alpha systems: The VLT/UVES database
• Origin and Evolution of the Abundance Gradient along the Milky Way Disk
• An integral field spectroscopic survey for high redshift damped Lyman-alpha galaxies