2010/12/09 by Stephen M. Feeney, Matthew C. Johnson, Daniel J. Mortlock +2 · 1 voice · 2 citations
Earth and Planetary Sciences · Physics and Astronomy · #Astrophysics #Bubble #CMB cold spot #Cosmic background radiation #Cosmic microwave background #Cosmological constant #Cosmology #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark energy #Dark matter #Geophysics and Gravity Measurements #Inflation (cosmology) #Mechanics #Observable #Physics #Planck #Quantum mechanics #Theoretical physics #astro-ph.CO #hep-ph #hep-th
paper · pdf · doi:10.1103/physrevlett.107.071301
published as Phys. Rev. Lett. 107, 071301 (2011) · Companion to arXiv:1012.3667. 5 pages, 2 figures. v3: replaced with version accepted by PRL. Significant extensions to the Bayesian pipeline to do the full-sky non-Gaussian source detection problem (previously restricted to patches). Note that this has changed the normalization of evidence values reported previously, as full-sky priors are now employed, but the conclusions remain unchanged
arxiv published 2010/12/09 · arxiv created 2011/07/12 · arxiv updated 2011/07/12 · openalex publication_date 2011/08/08 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The eternal inflation scenario predicts that our observable Universe resides inside a single bubble embedded in a vast inflating multiverse. We present the first observational tests of eternal inflation, performing a search for cosmological signatures of collisions with other bubble universes in cosmic microwave background data from the WMAP satellite. We conclude that the WMAP 7-year data do not warrant augmenting the cold dark matter model with a cosmological constant with bubble collisions, constraining the average number of detectable bubble collisions on the full sky N(s) < 1.6 at 68% C.L. Data from the Planck satellite can be used to more definitively test the bubble-collision hypothesis.