O stars He II and H lines in the 1 micron region

Details O stars He II and H lines in the 1 micron region O stars He II and H lines in the 1 micron region

May 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979a%26a....75...93v&link_type=abstract

Astronomy and Astrophysics, vol. 75, no. 1-2, May 1979, p. 93-96. NATO-supported research.

Astronomy and Astrophysics

Astrophysics

2

Helium, Near Infrared Radiation, O Stars, Paschen Series, Stellar Spectra, Absorption Spectra, H Lines, Stellar Radiation, Tables (Data), Wolf-Rayet Stars

Scientific paper

New observations of the He II 10124 line are presented. Except in the case of HD 228766, a binary on its way to becoming a Wolf Rayet, the 10124/4686 wavelength ratio is found to be clearly lower than the predicted one. Unexpectedly strong absorption is observed in a few objects; this raises again the question of pumping of the 2n-prime transition of He II by the corresponding n-prime lines of H. Paschen lines of H are observed in absorption except in two objects.

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