Implications of a primordial origin for the dispersion in D/H in quasar absorption systems

Craig J. Copi, Keith A. Olive, David N. Schramm

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

We explore the difficulties with a primordial origin of variations of D/H in quasar absorption systems. In particular we examine options such as a very large-scale inhomogeneity in the baryon content of the universe. We show that very large-scale (much larger than 1 Mpc) isocurvature perturbations are excluded by current cosmic microwave background observations. Smaller-scale ad hoc perturbations (~1 Mpc) still may lead to a large dispersion in primordial abundances but are subject to other constraints.

Original languageEnglish (US)
Pages (from-to)2758-2760
Number of pages3
JournalProceedings of the National Academy of Sciences of the United States of America
Volume95
Issue number6
DOIs
StatePublished - Mar 17 1998

Fingerprint Dive into the research topics of 'Implications of a primordial origin for the dispersion in D/H in quasar absorption systems'. Together they form a unique fingerprint.

Cite this