Hot Gas in High-Redshift Protogalaxies: Observations of High-Ion Absorption in Damped Lyman-Alpha Systems

Details Hot Gas in High-Redshift Protogalaxies: Observations of High-Ion Absorption in Damped Lyman-Alpha Systems Hot Gas in High-Redshift Protogalaxies: Observations of High-Ion Absorption in Damped Lyman-Alpha Systems

Sep 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007msngr.129...38f&link_type=abstract

The Messenger, vol. 129, p. 38-41

Physics

1

Scientific paper

The neutral discs of high-redshift galaxies give rise to the Damped Lyman-a (DLA) systems seen in the spectra of background quasars. We show for the first time that a hot phase of gas is present in DLAs, observable in the absorption lines of five-times-ionised oxygen. This plasma phase, which could harbour a considerable fraction of all the metals produced by star formation at these epochs, can be explained as the feedback from star formation taking place in the neutral discs.

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