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Title:
Chemical abundances in Hg-Mn stars
Authors:
Heacox, W. D.
Publication:
Astrophysical Journal Supplement Series, vol. 41, Dec. 1979, p. 675-688. Research supported by the University of Hawaii Foundation; (ApJS Homepage)
Publication Date:
12/1979
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Abundance, Chemical Composition, Manganese, Mercury (Metal), Metallic Stars, Stellar Spectra, Atmospheric Models, Error Analysis, Heavy Elements, Light Elements, Line Spectra, Nuclear Fusion, Stellar Rotation, Stellar Structure, Stellar Temperature
DOI:
10.1086/190637
Bibliographic Code:
1979ApJS...41..675H

Abstract

An abundance analysis has been conducted of 21 elements in 21 Hg-Mn, two Si-Cr, and six normal stars using model atmospheres and high-dispersion spectroscopy in the visible and UV. Manganese line strengths imply abundances that correlate well with stellar effective temperature. Within the studied sample of Hg-Mn stars there appears to be no correlation of abundances of any element with projected rotational velocity. Abundances in several Hg-Mn stars show patterns that are probably consistent with diffusion but difficult to reconcile with equilibrium nucleosynthesis. In general, no combination of gross stellar physical parameters is sufficient to characterize the patterns of line strengths observed in Hg-Mb Hg-Mn stars.

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