Astration of cosmological deuterium

Details Astration of cosmological deuterium Astration of cosmological deuterium

Mar 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...290..428c&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 290, March 15, 1985, p. 428-432. Research supported by the Robert A. Welch

Astronomy and Astrophysics

Astrophysics

27

Abundance, Big Bang Cosmology, Deuterium, Interstellar Gas, Nuclear Fusion, Stellar Mass Accretion, Chemical Evolution, Galactic Evolution, Helium Isotopes, Metallic Stars, Pre-Main Sequence Stars

Scientific paper

Attention is given to the degree of primordial deuterium's astration through the continuous galactic processes of star formation and chemical evolution. Exact analytic solutions are given for galactic chemical evolution when infall of constant composition occurs at a rate, f(t), which is presently defined. Solutions are given for the linear model with instantaneous recycling and with constant return fraction R. The results suggest that big bang D/H was at least three times larger than the largest values observed in today's solar neighborhood, and even larger if matter falling into the disk is already astrated.

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