Watching worlds collide: effects on the CMB from cosmological bubble collisions

@article{Chang2008WatchingWC,
  title={Watching worlds collide: effects on the CMB from cosmological bubble collisions},
  author={Spencer Chang and Matthew Kleban and Thomas S. Levi},
  journal={Journal of Cosmology and Astroparticle Physics},
  year={2008},
  volume={2009},
  pages={025-025}
}
We extend our previous work on the cosmology of Coleman-de Luccia bubble collisions. Within a set of approximations we calculate the effects on the cosmic microwave background (CMB) as seen from inside a bubble which has undergone such a collision. We find that the effects are always qualitatively similar—an anisotropy that depends only on the angle to the collision direction—but can produce a cold or hot spot of varying size, as well as power asymmetries along the axis determined by the… 

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