Ly-alpha Clouds Associated with Pop III Objects in Cold Dark Matter Models
Benedetta Ciardi, Andrea Ferrara
Abstract
We present a semi-analytical model to test the hypothesis that Ly-alpha QSO absorption lines originate in gaseous halos produced by multiple supernova explosions occurring in Pop III objects in a CDM cosmological scenario hoping to assess the validity of CDM models and/or constrain their parameters. The preliminary results indicate that the range of NHI, redshift distribution and metallicity of clouds are well reproduced by CDM if they are associated with galaxy halos or groups. Firm conclusions on clouds with NHI 1014 cm-2 need a more refined study.
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