On the identification of deuterium lines in QSO absorption systems

Details On the identification of deuterium lines in QSO absorption systems On the identification of deuterium lines in QSO absorption systems

Jul 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996astl...22..438l&link_type=abstract

Astronomy Letters, Volume 22, Issue 4, July 1996, pp.438-442; Pis'ma v Astronomicheskii Zhurnal, Vol. 22, p. 491

Astronomy and Astrophysics

Astronomy

2

Scientific paper

The ambiguity of identification of deuterium lines in QSO absorption systems is considered, under the assumption that the D I and H I absorption lines are formed in turbulent media with a finite correlation length of the stochastic velocity field. The relative shift of the D I and H I lines is shown to vary over the range +/-(4-8) km s^- 1^ for a cloud model with hydrogen column density N_HI_ = 10^17^ cm^-2^, the ratio D/H = 10^-4^, and kinetic temperature T_kin_ = 10^4^ K. The variations in the relative shift of the deuterium lines are fundamental in character and result from the stochastic nature of the formation of absorption lines in turbulent media

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