Lithium in an extreme halo star

Details Lithium in an extreme halo star Lithium in an extreme halo star

Mar 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...326l..23h&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 326, March 1, 1988, p. L23-L26.

Other

52

Dwarf Stars, Lithium, Metallicity, Stellar Composition, Stellar Spectra, D Lines, Interstellar Extinction, Spectral Line Width, Stellar Temperature

Scientific paper

Echelle spectra show that BD +3°740 is an extreme Population II dwarf with a logarithmic metallicity [Fe/H] ≈ -2.9, a space velocity |vLSR| ≈ 210 km s-1, and an effective temperature Te ≈ 6240K. Small corrections of the star's observed colors for interstellar reddening are derived from the observed interstellar D lines. The equivalent width Wλ = 17±3 mÅ of the Li I λ6707 line gives an abundance Li/H = (1.2±0.5)×10-10, in agreement with previous results for two other extreme halo stars.

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