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| Paper: |
Colliding Winds in Three Magellanic-Cloud WR Binaries |
| Volume: |
348, Astrophysics in the Far Ultraviolet: Five Years of Discovery with FUSE |
| Page: |
121 |
| Authors: |
St-Louis, N.; Moffat, A.F.J.; Marchenko, S.; Pittard, J.M.; Boisvert, P. |
| Abstract: |
We present a preliminary analysis of FUSE observations for three Wolf-Rayet (WR) binaries in the Magellanic Clouds: Sand 1 (SMC), Brey 22 (LMC) and Brey 32 (LMC). Phase-dependent variability is detected for these systems which we attribute to selective wind eclipses and excess emission from the shock cone that is formed when the two massive winds in the system collide. For Sand 1, profile fits yield an orbital inclination of i∼40°, a total cone openingangle of ∼80-90° and a streaming velocity along the shock cone of ∼3000 kms−1. For Brey 22 and Brey 32, two systems with almost the same spectral type, similar changes are observed but because the orbital periods are very different for these two binaries, some notable differences in their variability patterns are found. |
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