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Lithium in M67Echelle spectra recorded at the Li I 6707-A line are reported for seven main-sequence members and one cool subgiant in M67. The spectral types of the seven dwarfs studied range from about F8 at the turnoff point to about G5. The principal result is that the average lithium abundance in the three hottest main-sequence stars is 0.45 x 10 to the -9th. Any enrichment of lithium in the gas of the Galactic disk in the last 5 Gyr therefore has not exceeded a factor of about two and probably is entirely negligible, when the corresponding results for NGC 752 and the Hyades are taken into account.
Document ID
19870040406
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Hobbs, L. M.
(Chicago, University IL, United States)
Pilachowski, Catherine
(Kitt Peak National Observatory Tucson, AZ, United States)
Date Acquired
August 13, 2013
Publication Date
December 15, 1986
Publication Information
Publication: Astrophysical Journal, Part 2 - Letters to the Editor
Volume: 311
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
87A27680
Funding Number(s)
CONTRACT_GRANT: NGR-14-001-147
Distribution Limits
Public
Copyright
Other

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