Hei Lambda 4922 IN B-Stars - Comparison of Theory and Observations

Details Hei Lambda 4922 IN B-Stars - Comparison of Theory and Observations Hei Lambda 4922 IN B-Stars - Comparison of Theory and Observations

May 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...245..977h&link_type=abstract

Astrophysical Journal, Vol.245, P. 977, 1981

Astronomy and Astrophysics

Astrophysics

10

Scientific paper

Profiles of the He I λ4922 line have been observed in 15 B-type stars with an unintensified Reticon detector on the coudé spectrograph of the University of Hawaii's 2.2 m telescope on Mauna Kea. The observations are compared with the theoretical line profiles computed by Mihalas, Barnard, Cooper, and Smith, who used an improved line broadening theory. The results show that the computed profiles reproduce the core and red wing of the stellar profiles, but the forbidden component in the blue wing of the line is deeper and broader than the theoretical predictions. Photographic Hα line profiles have been obtained for three of our program stars, and for this sample we find that the Balmer line, He I λ4922, and Strömgren photometric colors yield a consistent set of atmospheric parameters.

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