2 papers
astro-ph2000
Monte Carlo inversion of hydrogen and metal lines from QSO absorption spectra
Sergei A. Levshakov, Irina I. Agafonova, Wilhelm H. Kegel
A new method, based on the simulated annealing algorithm and aimed at the inverse problem in the analysis of intergalactic (interstellar) complex spectra of hydrogen and metal line…
astro-ph1999
On the deuterium abundance at z_a = 3.514 towards APM 08279+5255
S. A. Levshakov, I. I. Agafonova, W. H. Kegel
A very low primordial deuterium abundance of D/H = 1.5 10^{-5} has recently been proposed by Molaro et al. in the Lyman limit system with log(N_HI) = 18.1 cm^{-2} at z_a = 3.514 to…