Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987azh....64...74k&link_type=abstract
Astronomicheskii Zhurnal (ISSN 0004-6299), vol. 64, Jan.-Feb. 1987, p. 74-78. In Russian.
Astronomy and Astrophysics
Astronomy
3
A Stars, Chemical Composition, Globular Clusters, Horizontal Branch Stars, Stellar Composition, Stellar Atmospheres, Stellar Spectra, Stellar Temperature
Scientific paper
The chemical compositions of HD 2857, 64488, 93329, 105262, HDE 281679, and BD + 20 deg 5009 are determined. Twelve spectrograms characterized by a reciprocal dispersion of 9 A/mm which were obtained on a 6-m telescope are used. The following parameters of seven horizontal branch stars have been found: lg T(e) = 3.90 + or - 0.01, lg g = 2.38 + or 0.05, the concentration of Fe/H = -1.55 + or - 0.12, microturbulence velocity = 2.2 + or - 0.5 km/s, v sin i = 20 + or - 6 km/s, absolute stellar magnitude = 0.08 + or - 0.11, bolometric stellar magnitude = -0.16 + or - 0.10, and lg(R/solar radius) = 0.70 + or - 0.02.
Klochkova Valentina G.
Panchuk Vladimir E.
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