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Discussion A: On the abundance of deuterium in the local interstellar medium and in high-redshift systems

Published online by Cambridge University Press:  23 April 2010

Monica Tosi
Monica Tosi*
Affiliation:
INAF - Osservatorio Astronomico di Bologna, Via Ranzani 1, I-40127, Bologna, Italy email: [email protected]
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Abstract

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The first discussion session held at the IAU Symposium 268 focussed on the deuterium content in the local interstellar medium (LISM) and in high-redshift systems. There were two key questions proposed to the audience: 1) what should be taken as representative abundance of D in the LISM, and 2) how can we explain the dispersion of the D abundance measured in high-redshift, very low metallicity environments? While on the latter point people seem to agree that observational and data analyses uncertainties are the most likely explanation, on the former question no consensus was reached. The historical and observational background at the basis of these questions and the discussion are schematically reported here.

Keywords

ISM: abundancesGalaxy: evolutioncosmology: observationsquasars: absorption lines
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 5 , Symposium S268: Light Elements in the Universe , November 2009 , pp. 153 - 161
Copyright
Copyright © International Astronomical Union 2010

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