Cosmological Evolution of the Universe Neutral Gas Mass Measured by Quasar Absorption Systems

(2)SIRTF Science Center; California Institute of Technology; Celine Peroux (1); Lisa J. Storrie-Lombardi (2) ((1)Institute of Astronomy; Mike Irwin (1); Pasadena; Richard G. McMahon (1); UK; University of Cambridge; US)

arxiv: astro-ph/0101212 · v1 · pith:YW45JP4Ynew · submitted 2001-01-12 · 🌌 astro-ph

Cosmological Evolution of the Universe Neutral Gas Mass Measured by Quasar Absorption Systems

Celine Peroux (1) , Richard G. McMahon (1) , Mike Irwin (1) , Lisa J. Storrie-Lombardi (2) ((1)Institute of Astronomy , University of Cambridge , UK , (2)SIRTF Science Center , California Institute of Technology

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Pasadena US)

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classification 🌌 astro-ph

keywords cosmologicalevolutionneutralquasarabsorptionformationmassomega

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The cosmological evolution of neutral hydrogen is an efficient way of tracing structure formation with redshift. It indicates the rate of evolution of gas into stars and hence the gas consumption and rate star formation history of the Universe. In measuring HI, quasar absorbers have proven to be an ideal tool and we use observations from a recent survey for high-redshift quasar absorption systems together with data gathered from the literature to measure the cosmological comoving mass density of neutral gas. This paper assumes Omega_M=0.3, Omega_lambda=0.7 and h=0.65.

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Cosmological Evolution of the Universe Neutral Gas Mass Measured by Quasar Absorption Systems

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