The clear view of WR140's collisionless shocks through the companion O-star wind

Details The clear view of WR140's collisionless shocks through the companion O-star wind The clear view of WR140's collisionless shocks through the companion O-star wind

Sep 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007cxo..prop.2332p&link_type=abstract

Chandra Proposal ID #09200257

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Chandra Proposal Id #09200257

Scientific paper

In January 2009, two extraordinary high-mass colliding-wind binary systems, eta Car and WR140, will go through the periastron passages of their respective 5.5 and 7.9 year orbits. The preceding months are the most favorable for observing the rapid rise to X-ray maximum and learning fundamental lessons about shocks, hot plasmas and mass-loss in the upper HR diagram. Three HETGS snapshot spectra of WR140 will capture the line-profile and global spectral responses of its collisionless shocks to the changing physical conditions that follow the well-defined orbital geometry, offering unique information about the plasma and mass loss from both stellar components. This proposal, and one on eta Car, will take advantage of opportunities for X-ray specroscopy that might not arise again.

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