Analysis of four F subdwarfs used as spectrophotometric standards

Details Analysis of four F subdwarfs used as spectrophotometric standards Analysis of four F subdwarfs used as spectrophotometric standards

Aug 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...307..253b&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 307, Aug. 1, 1986, p. 253-260.

Astronomy and Astrophysics

Astrophysics

35

Stellar Atmospheres, Stellar Composition, Stellar Gravitation, Stellar Spectrophotometry, Stellar Temperature, Subdwarf Stars, Atmospheric Models, Oxygen, Stellar Evolution, Ubv Spectra

Scientific paper

Scans and colors of the four F subdwarfs defined as spectrophotometric standards by Oke and Gunn have been analyzed to find the stellar temperatures, gravities, and chemical compositions. The results for the chemical composition, from uvby photometry and Thuan-Gunn photometry, are generally consistent with those from high-dispersion spectroscopy. The temperatures deduced from the scans are consistent with those from the colors in the visible region of the spectrum. The gravities deduced from the uvby photometry are generally higher than those from the scans and more in accord with the gravities that are deduced from recent stellar evolution calculations.

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