An 18-year Fermi-LAT stacking limit on GeV ${\hat{I}}^3$-ray emission from particle-accelerating colliding-wind binaries

Youngwan Son

The wind-collision regions of massive colliding-wind binaries (CWBs) accelerate relativistic particles, as shown by their non-thermal radio synchrotron and, in $\hat{I}\cdot$ Car, hard X-ray…