Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984nascp2349..487b&link_type=abstract
In NASA. Goddard Space Flight Center Future of Ultraviolet Astronomy Based on Six Years of IUE Res. p 487-490 (SEE N85-20961 1
Astronomy and Astrophysics
Astronomy
4
Line Spectra, Main Sequence Stars, Stellar Composition, Stellar Magnetospheres, Stellar Spectra, Stellar Winds, Astronomical Models, Helium, Line Spectra, Silicon, Spectrum Analysis, Stellar Rotation, Zeeman Effect
Scientific paper
A sample is presented of eleven helium weak and Si stars, observed at high dispersion. These are HD 7537, 21699, 28843, 34452, 125823, 131120, 142301, 142990, 144334, 175362 AND 215441. The stars span the range B2.5 to B6 and include both magnetic and nonmagnetic as well as rapid and slow rotators. In the two stars designated sn by Abt, the C IV profile is strong (HD 5737 and 21699) while all of the other stars can be explained by numerous blended lines of Fe III and similar ions. Most of the stars were observed several times, and only HD 21699 appears to show large amplitude spectral variations.
Barker Paul K.
Brown David N.
Shore Steve N.
Sonneborn George
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