Mark Runacres
Mark Runacres
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stars: individual: Cyg OB2 No. 9
Non-thermal radio emission from O-type stars. III. Is Cygnus OB2 No. 9 a wind-colliding binary?
The star Cyg OB2 No. 9 is a well-known non-thermal radio emitter. Recent theoretical work suggests that all such O-stars should be in a binary or a multiple system. However, there is no spectroscopic evidence of a binary component. Re-analysis of …
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