Feeney, SM;
Johnson, MC;
Mortlock, DJ;
Peiris, HV;
(2011)
First Observational Tests of Eternal Inflation.
PHYS REV LETT
, 107
(7)
, Article 071301. 10.1103/PhysRevLett.107.071301.
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Abstract
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) over bar (s) < 1.6 at 68% C.L. Data from the Planck satellite can be used to more definitively test the bubble-collision hypothesis.
| Type: | Article |
|---|---|
| Title: | First Observational Tests of Eternal Inflation |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.107.071301 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.107.071301 |
| Language: | English |
| Additional information: | © 2011 American Physical Society |
| Keywords: | PROBE WMAP OBSERVATIONS, NEEDLETS |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1318830 |
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