Computer Science – Learning
Scientific paper
Sep 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008cxo..prop.2528p&link_type=abstract
Chandra proposal ID #10200414
Computer Science
Learning
Scientific paper
In January 2009, the two most extraordinary high-mass colliding-wind binary systems, eta Car and WR140, will both go through the periastron passages of their respective 5.5 and 7.9 year orbits. The preceding weeks 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. Two HETGS spectra of WR140 before periastron and one after will capture its response to the changing physical conditions that follow the well-defined orbital geometry, offering unique information about the dynamics, dissipation and relaxation of collisionless shocks. The proposals on WR140 and eta Car will take advantage of opportunities for X-ray specroscopy that might nt arise again.
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