Abundance analyses of metal-poor stars. III - Red spectra of nine dwarfs

Details Abundance analyses of metal-poor stars. III - Red spectra of nine dwarfs Abundance analyses of metal-poor stars. III - Red spectra of nine dwarfs

Jan 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...235..491p&link_type=abstract

Astrophysical Journal, Part 1, vol. 235, Jan. 15, 1980, p. 491-503.

Astronomy and Astrophysics

Astrophysics

33

Abundance, Dwarf Stars, Late Stars, Spectrophotography, Spectrum Analysis, Absorption Spectra, Metals, Milky Way Galaxy, Nuclear Fusion, Stellar Temperature

Scientific paper

Logarithmic iron abundances with respect to the sun are presented for nine cool, metal-poor dwarfs, and rederived for 15 hotter dwarfs and subgiants. Equivalent widths of lines as weak as 10 mA are used in this analysis, by invoking the goodness of the wavelength coincidence between observed and theoretical line positions to discriminate against noise features and line blends. For the stars discussed by Peterson (1978), the use of furnace gf-values and an independently determined value (-4.50) for the logarithm of the solar iron-to-hydrogen ratio produces abundances which are lower by 0.2 dex than those derived from a solar/stellar line-by-line comparison with vt = 1 km/sec.

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