| Article | |
| Report number | arXiv:1305.1970 ; CERN-PH-TH-2013-094 ; CERN-PH-TH-2013-094 |
| Title | Optimal analysis of azimuthal features in the CMB |
| Author(s) | Osborne, Stephen (Stanford U., Phys. Dept. ; SLAC) ; Senatore, Leonardo (Stanford U., Phys. Dept. ; KIPAC, Menlo Park ; SLAC ; Stanford U., ITP ; CERN) ; Smith, Kendrick (CERN ; Princeton U.) |
| Publication | 2013-10-01 |
| Imprint | 10 May 2013 |
| Number of pages | 30 |
| Note | Comments: 30 pages, 5 figures 30 pages, 5 figures |
| In: | JCAP 10 (2013) 001 |
| DOI | 10.1088/1475-7516/2013/10/001 |
| Subject category | Astrophysics and Astronomy |
| Abstract | We present algorithms for searching for azimuthally symmetric features in CMB data. Our algorithms are fully optimal for masked all-sky data with inhomogeneous noise, computationally fast, simple to implement, and make no approximations. We show how to implement the optimal analysis in both Bayesian and frequentist cases. In the Bayesian case, our algorithm for evaluating the posterior likelihood is so fast that we can do a brute-force search over parameter space, rather than using a Monte Carlo Markov chain. Our motivating example is searching for bubble collisions, a pre-inflationary signal which can be generated if multiple tunneling events occur in an eternally inflating spacetime, but our algorithms are general and should be useful in other contexts. |
| Copyright/License | Preprint: © 2013-2025 CERN (License: CC-BY-3.0) |
Corresponding record in: Inspire
Element opprettet 2013-05-10, sist endret 2024-11-29
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