Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21542602r&link_type=abstract
American Astronomical Society, AAS Meeting #215, #426.02; Bulletin of the American Astronomical Society, Vol. 42, p.341
Astronomy and Astrophysics
Astrophysics
Scientific paper
The colliding wind binary (CWB) systems Eta Carinae and WR140 provide unique laboratories for X-ray astrophysics. Their wind-wind collisions produce hard X-rays, which have been monitored extensively by several X-ray telescopes, such as RXTE and Chandra. To interpret these X-ray light curves and spectra, we apply 3D hydrodynamic simulations of the wind-wind collision using both smoothed particle hydrodynamics (SPH) and finite difference methods. We find isothermal simulations that account for the absorption of X-rays from an assumed point source of X-ray emission at the apex of the wind-collision shock cone can closely match the RXTE light curves of both Eta Carinae and WR140. We are now applying simulations with self-consistent energy balance and extended X-ray emission to model the observed X-ray spectra. We present these results and discuss efforts to understand the earlier recovery of Eta Carinae's RXTE light curve from the 2009 minimum.
Corcoran Michael F.
Madura Thomas I.
Okazaki Atsuo T.
Owocki Stanley P.
Russell Christopher M. P.
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