Acyclic High-Energy Variability in Eta Carinae and WR 140
- Corcoran, Michael F.
- Physical Description:
- 1 electronic document
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- Eta Carinae and WR 140 are similar long-period colliding wind binaries in which X-ray emission is produced by a strong shock due to the collision of the powerful stellar winds. The change in the orientation and density of this shock as the stars revolve in their orbits influences the X-ray flux and spectrum in a phase dependent way. Monitoring observations with RXTE and other X-ray satellite observatories since the 1990s have detailed this variability but have also shown significant deviations from strict phase dependence (short-term brightness changes or "flares", and cyc1e-to-cyc1e average flux differences). We examine these acylic variations in Eta Car and WR 140 and discuss what they tell us about the stability of the wind-wind collision shock.
- NASA Technical Reports Server (NTRS) Collection.
- Document ID: 20120008690. and GSFC.JA.5950.2012.
- Copyright, Distribution under U.S. Government purpose rights.
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