Shock Dynamics in Eta Carinae Approaching the 2009 Periastron Passage: A Twisted Tail

Details Shock Dynamics in Eta Carinae Approaching the 2009 Periastron Passage: A Twisted Tail Shock Dynamics in Eta Carinae Approaching the 2009 Periastron Passage: A Twisted Tail

Sep 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007cxo..prop.2341c&link_type=abstract

Chandra Proposal ID #09200584

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Chandra Proposal Id #09200584

Scientific paper

In January 2009, the two most 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 months before, during their rapid rise to X-ray maximum, are the most favorable time for observing X-ray emission at high resolution and learning fundamental lessons about shocks, hot plasmas and mass-loss in the upper HR diagram. Three HETGS observations of Eta Car will monitor X-ray line and continuum changes to obtain unique information about the X-ray emitting plasma in the wind-wind collision, as a probe of mass loss from Eta Car and from the hidden companion star. This proposal, and a complementary one on WR 140, will take advantage of an opportunity that may never arise again.

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