Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983pasp...95..169c&link_type=abstract
Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 95, March 1983, p. 169-180.
Astronomy and Astrophysics
Astronomy
10
F Stars, Metallicity, Milky Way Galaxy, Stellar Spectrophotometry, Supergiant Stars, Absorption Spectra, Calcium, Early Stars, Interstellar Extinction, Reference Stars, Stellar Luminosity, Stellar Spectra, Ubv Spectra
Scientific paper
IIDS (Intensified Image Dissector Scanner) spectrophotometry was performed for 16 objects suspected of being highly reddened A-F stars located in a Galactic anticenter field at l = 186 deg and b = -2.5 deg. The stars were classified according to spectral type. Two of the stars appear to be luminous F-type stars having large galactocentric distances (12-30 kpc). These two stars are moderately metal-poor, consistent with an abundance gradient in the Galactic disk of d(Fe/H)dR = -0.08 + or - 0.04/kpc. Supplementary photographic image-tube spectrograms have been used as comparisons in the determination of the stellar calcium abundances. The results of the present investigation indicate that IIDS spectrophotometry can be used to obtain spectral classifications and preliminary abundance measurements for early-type stars.
Christian Carol A.
Smith Harold A.
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