The metal-weak A0 III star Alpha Draconis

Details The metal-weak A0 III star Alpha Draconis The metal-weak A0 III star Alpha Draconis

Feb 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987pasp...99..130a&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 99, Feb. 1987, p. 130-137. Research supported by the Ci

Other

17

A Stars, Abundance, Binary Stars, Metallicity, Stellar Composition, Atmospheric Models, H Gamma Line, Nickel, Scandium, Stellar Spectrophotometry, Tables (Data)

Scientific paper

Two fine analyses of the A0 III star Alpha Dra were performed using the same sources of atomic data, the same spectrophotometric data, and the same model-atmospheres code, but with photographic region spectrograms obtained at two different observatories, Kitt Peak National Observatory and Dominion Astrophysical Observatory. The resultant values show differences typically of the order of a factor of two with the higher signal-to-noise data yielding smaller abundances. On the whole, Alpha Dra is a star with abundances typically one-third solar; however, it is definitely scandium and nickel poor. Its abundance pattern shows a strong resemblance to those of Vega and other metal-poor A stars.

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