Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...224l.127s&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor, vol. 224, Sept. 15, 1978, p. L127-L131.
Astronomy and Astrophysics
Astrophysics
44
Early Stars, H Alpha Line, Stellar Spectrophotometry, Ultraviolet Spectra, Variable Stars, B Stars, Emission Spectra, Oao 3, Red Shift, Stellar Envelopes, Stellar Rotation, X Ray Sources
Scientific paper
Simultaneous scans of the ultraviolet Si IV and Mg II resonance doublets in the spectrum of Gamma Cas with the Copernicus satellite during 64 continuous hours of observation, and H-alpha scans from a ground station, are described. No evidence is found for a rotation period of Gamma Cas, but narrow emission components in both ultraviolet doublets are reported along with a sudden emission increase on January 29.1, 1977 UT which appeared to be present in both H-alpha and the ultraviolet lines.
Slettebak Arne
Snow P. Jr. Th.
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