Elemental abundances of field horizontal branch stars - IV. HD 74721, 86986 and 93329

Details Elemental abundances of field horizontal branch stars - IV. HD 74721, 86986 and 93329 Elemental abundances of field horizontal branch stars - IV. HD 74721, 86986 and 93329

May 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996mnras.280..285a&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 280, Issue 1, pp. 285-290.

Astronomy and Astrophysics

Astronomy

6

Stars: Abundances, Stars: Horizontal Branch, Stars: Individual: Hd 74721, Stars: Individual: Hd 86986, Stars: Individual: Hd 93329, Stars: Population Ii

Scientific paper

Studies of 200-A-long regions recently obtained with a 3000-pixel-long CCD at the coude feed telescope of the Kitt Peak National Observatory (KPNO) are used to extend fine analyses of the field horizontal branch A stars HD 74721, 86986 and 93329. Spectra of other stars obtained both at KPNO and at the Dominion Astrophysical Observatory show that previously found wavelength-dependent equivalent width systematics are probably due to how the spectra were measured as well as to resolution differences. The derived He/H ratios agree with the Buzzoni et al. value of 0.075, within measurement errors. Some derived elemental abundances are found to be correlated with one another.

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