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The Deuterium Abundance in QSO Absorption Systems: A Mesoturbulent Approach1

Published online by Cambridge University Press:  25 May 2016

Sergei A. Levshakov
Sergei A. Levshakov*
Affiliation:
Department of Theoretical Astrophysics, Ioffe Physico-Technical Institute, 194021 St. Petersburg, Russia

Abstract

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A new method, based on simulated annealing technique and aimed at the inverse problem in the analysis of intergalactic or interstellar complex spectra of hydrogen and metal lines, is outlined. We consider the process of line formation in clumpy stochastic media accounting for fluctuating velocity and density fields self-consistently. Two examples of the analysis of ‘H+D’-like absorptions seen at za = 3.514 and 3.378 towards APM 08279+5255 are presented.

Type
3. Abundances of D, 3He and 4He
Information
Symposium - International Astronomical Union , Volume 198: The Light Elements and their Evolution , 2000 , pp. 135 - 140
Copyright
Copyright © Astronomical Society of the Pacific 2000 

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