Computer Science
Scientific paper
Jul 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984iue..prop.1760a&link_type=abstract
IUE Proposal ID #WRGLA
Computer Science
Scientific paper
We propose observation of the Wolf-Rayet + O Star binary systems HD 90657, HD 186943, HD 211854, HD 97152, and HD 155270 at orbital phases in which the O component undergoes selective atmospheric eclipse by the WR wind. Because these particular systems have nearly zero orbital inclination, the varying absorption of the O Star spectrum as a function of impact parameter can be used to derive the optical depth distribution in the winds of the WR's. Each system will be observed in the lowdispersion mode during US2 shifts. These observations will be combined with archival data to achieve adequate phase coverage for the wind structure analysis. Possible wind-wind collision effects will also be studied. The work being proposed is an extension of our previous WRDLA research. We wish, in particular, to make observations at small impact parameters to gain information on the initial acceleration of the WR wind, and to make similar observation of several WC stars. One of the results of our previous work was the striking similarity in the outer parts of the flows of the five WN systems then observed. We will determine now if there are, however, observational differences between the WC and WN flows, and in the inner parts of the WN flows.
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