Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...231..491g&link_type=abstract
Astrophysical Journal, Part 1, vol. 231, July 15, 1979, p. 491-494.
Astronomy and Astrophysics
Astrophysics
9
H Lines, Stellar Evolution, Stellar Spectrophotometry, Silicon Radiation Detectors, Spectral Line Width, Stellar Atmospheres, Vidicons
Scientific paper
Line profiles and equivalent widths of H-beta and H-gamma were measured, using the SIT digital spectrograph, in 19 DA stars for which multichannel photometry existed. These equivalent widths differ by a small scale factor. This material is used further to calibrate older W(H-gamma), measured photographically, which are found to be 15% too small. These scale changes have a significant effect when comparing the theoretical W(H-gamma) with model atmospheres. The agreement of W(H-gamma) with theory is quite good, indicating log g = 8 or slightly higher.
Greenstein Jesse Leonard
Vauclair Gerard
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