High-redshift damped Ly alpha absorbing ga axy model reproducing the N-HI -Z distribution
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High-redshift damped Ly alpha absorbing ga axy model reproducing the N-HI -Z distribution. / Krogager, Jens-Kristian; Moller, Palle; Christensen, Lise B.; Noterdaeme, Pasquier; Fynbo, Johan P. U.; Freudling, Wolfram.
In: Monthly Notices of the Royal Astronomical Society, Vol. 495, No. 3, 22.05.2020, p. 3014-3021.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - High-redshift damped Ly alpha absorbing ga axy model reproducing the N-HI -Z distribution
AU - Krogager, Jens-Kristian
AU - Moller, Palle
AU - Christensen, Lise B.
AU - Noterdaeme, Pasquier
AU - Fynbo, Johan P. U.
AU - Freudling, Wolfram
PY - 2020/5/22
Y1 - 2020/5/22
N2 - We investigate how damped Lyman alpha absorbers (DLAs) at z similar to 2 - 3, detected in large optical spectroscopic surveys of quasars, trace the population of star-forming galaxies. Building on previous results, we construct a model based on observed and physically motivated scaling relations in order to reproduce the bivariate distributions of metallicity, Z, and H column density, N-HI. Furthermore, the observed impact parameters fOr galaxies associated tti DLAs are in agreement with the model predictions. The model strongly favours a metallieity gradient, which scales with the luminosity of the host galaxy, with a value of gamma* = -0.019 +/- 0,008 dex kpc(-1) for L* galaxies that gets steeper for fainter galaxies. We find that DLAs trace galaxies over a wide range of galaxy luminosities, however, the bulk of the DLA cross-section arises in galaxies with L similar to 0.1 L* at z similar to 2.5 consistent with numerical simulations.
AB - We investigate how damped Lyman alpha absorbers (DLAs) at z similar to 2 - 3, detected in large optical spectroscopic surveys of quasars, trace the population of star-forming galaxies. Building on previous results, we construct a model based on observed and physically motivated scaling relations in order to reproduce the bivariate distributions of metallicity, Z, and H column density, N-HI. Furthermore, the observed impact parameters fOr galaxies associated tti DLAs are in agreement with the model predictions. The model strongly favours a metallieity gradient, which scales with the luminosity of the host galaxy, with a value of gamma* = -0.019 +/- 0,008 dex kpc(-1) for L* galaxies that gets steeper for fainter galaxies. We find that DLAs trace galaxies over a wide range of galaxy luminosities, however, the bulk of the DLA cross-section arises in galaxies with L similar to 0.1 L* at z similar to 2.5 consistent with numerical simulations.
KW - galaxies: high-redshift
KW - quasars: absorption lines
KW - galaxies: statistics
KW - MASS-METALLICITY RELATION
KW - GALAXY LUMINOSITY
KW - STAR-FORMATION
KW - I ABSORBERS
KW - LYMAN
KW - SYSTEMS
KW - EMISSION
KW - DUST
KW - BIAS
KW - SIMULATIONS
U2 - 10.1093/mnras/staa1414
DO - 10.1093/mnras/staa1414
M3 - Journal article
VL - 495
SP - 3014
EP - 3021
JO - Royal Astronomical Society. Monthly Notices
JF - Royal Astronomical Society. Monthly Notices
SN - 0035-8711
IS - 3
ER -
ID: 247027066