AAS 197, January 2001
Session 118. Binary Systems with Black Holes and Neutron Stars
Oral, Thursday, January 11, 2001, 10:30am-12:00noon, Towm and Country

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[118.06] The X-Ray Photo-ionized Wind in Cen X-3/V779 Cen

P. Wojdowski, D. Liedahl (Lawrence Livermore National Laboratory), M. Sako, F. Paerels, S. Kahn (Columbia University)

We present a high resolution spectrum of Cen X-3 obtained over an eclipse with Chandra/HETGS. The line flux ratios in helium-like triplets confirm our interpretation that the emission lines are due to recombination in a photoionized plasma. The line fluxes indicate that the wind was less highly ionized and less dense than in an earlier observation with ASCA. Preliminary results suggest that the velocity of the wind derived from line shifts and line widths is lower than that of winds in isolated O stars and so the mass-loss rate is also less than that for isolated O stars. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract W-7405-Eng-48.

The author(s) of this abstract have provided an email address for comments about the abstract: patrickw@virgo.llnl.gov

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