Hydrogen profiles, helium line strengths, and surface gravities of eclipsing binary stars

Details Hydrogen profiles, helium line strengths, and surface gravities of eclipsing binary stars Hydrogen profiles, helium line strengths, and surface gravities of eclipsing binary stars

Jan 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975apjs...29...43o&link_type=abstract

Astrophysical Journal Supplement Series (Supplement no. 274), vol. 29, Jan. 1975, p. 43-54. Research supported by the Universit

Astronomy and Astrophysics

Astrophysics

29

Early Stars, Eclipsing Binary Stars, Stellar Gravitation, Stellar Spectra, Stellar Spectrophotometry, A Stars, B Stars, Gravitational Effects, Helium, Hydrogen, Spectral Line Width

Scientific paper

Coude spectroscopy and four-color photometry are used to show that surface gravities of eclipsing binary stars determined from hydrogen line profiles and from theoretical profile grids are in agreement with gravities based on binary light and radial velocity solutions. Agreement is obtained with both the Griem and the Vidal-Cooper-Smith line-broadening theories. Agreement is also found for gravities determined from neutral helium line strengths for N(He)/N(H) equals 0.1.

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