1302.5631.pdf (1.18 MB)
General CMB bispectrum analysis using wavelets and separable modes
journal contribution
posted on 2023-06-08, 18:13 authored by Donough Regan, Pia Mukherjee, David SeeryDavid SeeryIn this paper we combine partial-wave (`modal') methods with a wavelet analysis of the CMB bispectrum. Our implementation exploits the advantages of both approaches to produce robust, reliable and efficient estimators which can constrain the amplitude of arbitrary primordial bispectra. This will be particularly important for upcoming surveys such as \emph{Planck}. A key advantage is the computational efficiency of calculating the inverse covariance matrix in wavelet space, producing an error bar which is close to optimal. We verify the efficacy and robustness of the method by applying it to WMAP7 data, finding \fnllocal=38.4 \pm 23.6 and \fnlequil=-119.2 \pm 123.6.
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Publication status
- Published
File Version
- Accepted version
Journal
Physical Review DISSN
1550-7998Publisher
American Physical SocietyExternal DOI
Volume
88Page range
043512-1-043512-17Department affiliated with
- Physics and Astronomy Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2014-09-08First Open Access (FOA) Date
2014-09-08First Compliant Deposit (FCD) Date
2014-09-07Usage metrics
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