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2010MNRAS.403.1633P - Mon. Not. R. Astron. Soc., 403, 1633-1656 (2010/April-3)
3D models of radiatively driven colliding winds in massive O + O star binaries - II. Thermal radio to submillimetre emission.
PITTARD J.M.
Abstract (from CDS):
In circular systems with (near) identical stars, the observed variability in synthetic light curves is typically less than a factor of 2. Eccentric systems may show order of magnitude or greater flux variability, especially if the plasma in the WCR transitions from an adiabatic to a radiative state and vice-versa - in such cases, the flux can display significant hysteresis with stellar separation. We further demonstrate that clumping can affect the variability of radio light curves.
We investigate the spectral index of the emission, and often find indices steeper than +0.6. Synthetic images display a variety of morphologies, with the emission sometimes resembling an intertwined `double-helix'. We conclude by comparing our results to observations. The predictions made in this paper are of interest to future observations with the next generation of radio and submm telescopes, including the EVLA, e-MERLIN, ALMA and the Square Kilometre Array, and future upgrades to the VLBA.
Abstract Copyright: © 2010 The Author. Journal compilation © 2010 RAS
Journal keyword(s): shock waves - binaries: general - stars: early-type - stars: mass loss - stars: winds, outflows - radio continuum: stars
Simbad objects: 35
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