Gas in the Universe

Fuelling Star Formation Near and Far
  • Padeli Papadopoulos
Conference paper
Part of the Astrophysics and Space Science Library book series (ASSL, volume 276)

Abstract

Atomic and molecular hydrogen constitute the bulk of neutral gas mass in the Universe, thus their role in the star formation process is self-evident. In the Early Universe galaxies whose entire mass is dominated by gas have now been identified, leading to speculations that such objects are viewed in the early stages of forming their eventual stellar populations. I will briefly review the methods of measuring the distribution of HI and H2 gas in the Universe, their short comings, and the role of molecular gas and dust in thee volution and the search for galaxies in the early stages of their formation. Finally I discuss the possibility of H2 as the dominant component of dark matter in galactic disks.

Keywords

H2 HI gas galaxy formation galaxy evolution star formation 

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Copyright information

© Springer Science+Business Media Dordrecht 2002

Authors and Affiliations

  • Padeli Papadopoulos
    • 1
  1. 1.Space Science Department of ESA, ESTECAstrophysics DivisionNoordwijkThe Netherlands

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