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Visual Orbits for Understanding X-ray emission from Massive Colliding Wind Binaries

Presentation #107.01 in the session Stellar/Compact Objects - Poster Session.

Published onMay 03, 2024
Visual Orbits for Understanding X-ray emission from Massive Colliding Wind Binaries

Massive binaries are important sources of ionization and feedback in the Universe. As many massive stars are born in binaries and all massive stars experience large amounts of mass loss, the collision of wind material at high velocity in a massive binary system is a source of high-energy emissions. The X-ray emission can be modulated on the orbital time-scales and provides constraints on mass-loss rates and terminal wind speeds in these systems. High precision binary orbits are keystones for understanding X-ray production in these systems. In the past decade, long-baseline optical interferometry has expanded the sample of Wolf-Rayet + O star binaries with visually resolved orbits from two systems in 2011 to five systems now. We report on these systems with comparisons to the constraints we obtain from X-ray observations. The new orbits of these systems will allow for better constraints on the production of X-rays and related excess optical line emission in colliding wind binaries through a comparison with detailed hydrodynamic models in the future.

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