Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-09-16
Ann.Rev.Astron.Astrophys.43:861-918,2005
Astronomy and Astrophysics
Astrophysics
12 Figures, 60 page, Review Article. For electronic reprint of this article contact Arthur M. Wolfe
Scientific paper
10.1146/annurev.astro.42.053102.
Observations of damped Lyman alpha systems offer a unique window on the neutral-gas reservoirs that gave rise to galaxies at high redshifts. This review focuses on critical properties such as the H I and metal content of the gas and on independent evidence for star formation. Together, these provide an emerging picture of gravitationally bound objects in which accretion of gas from the IGM replenishes gas consumed by star formation. Other properties such as dust content, molecular content, ionized-gas content, gas kinematics, and galaxy identifications are also reviewed. These properties point to a multiphase ISM in which radiative and hydrodynamic feedback processes are present. Numerical simulations and other types of models used to describe damped Lyman alpha systems within the context of galaxy formation are also discussed.
Gawiser Eric
Prochaska Jason Xavier
Wolfe Arthur M.
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