Metallicity of solar-neighborhood F stars

Details Metallicity of solar-neighborhood F stars Metallicity of solar-neighborhood F stars

Jun 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984azh....61..483m&link_type=abstract

(Astronomicheskii Zhurnal, vol. 61, May-June 1984, p. 483-490) Soviet Astronomy (ISSN 0038-5301), vol. 28, May-June 1984, p. 284

Astronomy and Astrophysics

Astronomy

7

Dwarf Stars, F Stars, Giant Stars, Late Stars, Metallicity, Stellar Spectrophotometry, H Beta Line, Metallic Stars, Statistical Analysis, Stellar Luminosity

Scientific paper

Data from the uvby/H-beta photometric catalogs of Twarog (1980) and Philip and Egret (1980) are used to calculate the luminosity and blanketing indices and Fe/H abundance ratios of 2472 F-type dwarfs and giants within about 250 pc of the sun. The results are summarized in tables, graphs, and histograms and analyzed statistically. Fe/H is found to increase with effective temperature in unreddened F dwarfs, with a steep rise at type F5 and a distribution for types F6-G0 best described by the sum of two Gaussians and indicating the existence of two groups of late F dwarfs. The general properties of the F-giant distribution are seen as similar to those of the dwarfs. It is suggested that disparities between the metallicity values of nearby and distant stars and between northern and southern stars of the same class may be due to the southern location of the local system.

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