Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995stin...9529370n&link_type=abstract
Final Report Computer Sciences Corp., Calverton, MD. System Science Div.
Astronomy and Astrophysics
Astronomy
Line Spectra, Northern Hemisphere, O Stars, Periodic Variations, Satellite Observation, Spaceborne Astronomy, Stellar Rotation, Stellar Winds, Ultraviolet Astronomy, Ultraviolet Spectra, Visual Observation, Astronomical Photometry, Astronomical Polarimetry, Astronomical Spectroscopy, Explorer Satellites, High Resolution, Iue
Scientific paper
Simultaneous ultraviolet and optical observations of 10 bright O stars were organized in several observing campaigns lasting 3-6 days each. The observing campaigns included 12 observatories in the Northern hemisphere obtaining high resolution spectroscopy, photometry, and polarimetry, as well as 24-hour coverage with the IUE (International Ultraviolet Explorer) observatory. Over 600 high dispersion SWP spectra were acquired with IUE at both NASA and VILSPA for the completion of this work. The massive amount of data from these observing campaigns, both from IUE and the ground-based instruments, has been reduced and analyzed. The accompanying paper describes the data acquisition, analysis, and conclusions of the study performed. The most important results of this study are the strong confirmation of the ubiquitous variability of winds of O stars, and the critical correlation between rotation of the star and the wind variability as seen in the ultraviolet and optical spectral lines.
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