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The Lyα clouds as tracers of the evolution of the universe

  • Jose Luis Sanz
Part I The Universe at High-z
Part of the Lecture Notes in Physics book series (LNP, volume 470)

Abstract

The Lyα clouds are a useful tool for Cosmology because they sample the history of the universe to high redshift (z≅5). Their physical properties at any time (column densities, velocity dispersions, chemical abundances) and their statistical ones (number density, spatial correlation) give relevant information about the intergalactic medium. On the other hand, the relative lack of clouds near QSOs can be used to constrain the UV-background at high-z. It is now claimed that the origin of the clouds is tightly related to the process of structure formation in the universe and maybe a high proportion are in fact related to galaxies.

Keywords

Dark Matter Velocity Dispersion Column Density Galaxy Formation Intergalactic Medium 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 1996

Authors and Affiliations

  • Jose Luis Sanz
    • 1
  1. 1.Instituto de Fisica de Cantabria (CSIC-UC)Universidad de CantabriaSantander

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