Lyα Clouds Associated with Population III Objects in Cold Dark Matter Models

摘要

We present a semi-analytical model to test the hypothesis that Lyα QSO absorption lines originate in gaseous halos produced by multiple supernova explosions occurring in Population 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 N_H I, 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 N_H I ≤10~14 cm~-2 need a more refined study.