NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Evidence for a dispersion in the lithium abundances of extreme halo starsEvidence is presented to the effect that there exists a small dispersion in the lithium abundances of extreme halo dwarfs. This dispersion cannot be accounted for by standard stellar models alone, particularly toward the turnoff, and would thus require early differential Galactic Li enrichment, perhaps independent of metallicity. The magnitude of the dispersion is also consistent with the predictions of evolutionary models of halo stars with rotation, which do not require, but do not rule out either, early Galactic enrichment. These rotational models also predict a significant depletion in the lithium abundance during the stars' lifetime. The rotational models predict that stars which formed with very low initial angular momentum will have lithium abundances measurably above the plateau.
Document ID
19930072087
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Deliyannis, Constantine P.
(NASA Headquarters Washington, DC United States)
Pinsonneault, M. H.
(Yale Univ. New Haven, CT, United States)
Duncan, Douglas K.
(Space Telescope Science Inst. Baltimore, MD, United States)
Date Acquired
August 16, 2013
Publication Date
September 10, 1993
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 414
Issue: 2
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
93A56084
Funding Number(s)
CONTRACT_GRANT: NAGW-777
CONTRACT_GRANT: NAGW-778
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available