Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...311l..37h&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 311, Dec. 15, 1986, p. L37-L40.
Astronomy and Astrophysics
Astrophysics
50
Dwarf Stars, Lithium, Main Sequence Stars, Star Clusters, Stellar Spectrophotometry, Subgiant Stars, Abundance, Line Spectra, Milky Way Galaxy, Nuclear Fusion, Stellar Temperature
Scientific paper
Echelle spectra recorded at the Li I λ6707 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 >Li/H< = 0.45×10-9. Any enrichment of lithium in the gas of the galactic disk in the last 5 Gyr therefore has not exceeded a factor of about 2 and probably is entirely negligible, when the corresponding results for NGC 752 and the Hyades are taken into account.
Hobbs Lew M.
Pilachowski Catherine
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