Spectroscopy of Quasars

This section consists of two independent parts:

  1. Monte Carlo inversion of hydrogen and metal lines from QSO absorption spectra

    The primary objective of the study is the investigation of the physical properties and chemical composition of matter at different cosmological epochs. The investigation is based on high-resolution spectral observations of hydrogen and metal (C IV, Si IV, O VI and others) absorption-line profiles and advanced models of the radiative transfer in random media.

  2. Space-time distribution of matter in the Universe

    A statistical analysis of space-time distributions of C IV and Mg II absorption-line systems observed in QSO spectra within the cosmological redshift interval z=0.2-3.2 is performed. The results obtained give an evidence of possible existence of Global Large-Scale Structure of space-time distribution of matter in the Universe.

  3. First detection of HD molecules at high redshift

    We have analyzed the spectrum of the quasar PKS 1232+082 obtained by Petitjean et al. (2000). HD molecular lines are identified in an absorption system at the redshift   z = 2.3377.