Bubble, Bubble, Flow and Hubble: Large Scale Galaxy Flow from Cosmological Bubble Collisions

Abstract

We study large scale structure in the cosmology of Coleman-de Luccia bubble collisions. Within a set of controlled approximations we calculate the effects on galaxy motion seen from inside a bubble which has undergone such a collision. We find that generically bubble collisions lead to a coherent bulk flow of galaxies on some part of our sky, the details of which depend on the initial conditions of the collision and redshift to the galaxy in question. With other parameters held fixed the effects weaken as the amount of inflation inside our bubble grows, but can produce measurable flows past the number of efolds required to solve the flatness and horizon problems.

30 pages, 8 figures, pdftex, minor corrections and references added

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Cited by in corpus (16)

• First Observational Tests of Eternal Inflation: Analysis Methods and WMAP 7-Year Results
• Evidence against a supervoid causing the CMB Cold Spot
• Polarizing Bubble Collisions
• Simulating the universe(s): from cosmic bubble collisions to cosmological observables with numerical relativity
• Optimal filters for detecting cosmic bubble collisions
• Analyzing Cosmic Bubble Collisions
• Can we detect Hot or Cold spots in the CMB with Minkowski Functionals?
• Simulating the universe(s) II: phenomenology of cosmic bubble collisions in full General Relativity
• Bubble collisions and measures of the multiverse
• Barnacles -- A Novel Channel for Vacuum Decay
• Multiple Cosmic Collisions and the Microwave Background Power Spectrum
• A signature of anisotropic bubble collisions
• Optimal analysis of azimuthal features in the CMB
• Observable Signatures of a Classical Transition
• Gravity waves from cosmic bubble collisions
• Forecasting constraints from the cosmic microwave background on eternal inflation