Mapping the colliding wind region of the very massive binary WR20a

Details Mapping the colliding wind region of the very massive binary WR20a Mapping the colliding wind region of the very massive binary WR20a

Sep 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005cxo..prop.1885r&link_type=abstract

Chandra Proposal ID #07200285

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Chandra Proposal Id #07200285

Scientific paper

We propose to monitor the phase dependent variations of the X-ray flux of the colliding winds binary WR20a as it enters a photometric eclipse. WR20a is an eclipsing binary formed by two very massive (80 Msol) WN6ha stars revolving around each other in 3.7 days. Most of the X-ray emission of this system arises from a wind interaction zone in between the two stars. Observing this binary for 2 x 50ksec at specific orbital phases (0.20 - 0.35 and 0.35 - 0.50) will allow us to map for the first time the colliding wind region and to gain major insight into the properties of wind-wind interactions in particular and of stellar winds of Wolf-Rayet stars in general.

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