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Cosmic Microwave Background Mapmaking With A Messenger Field

Title: Cosmic Microwave Background Mapmaking With A Messenger Field.
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Name(s): Huffenberger, Kevin M., author
Naess, Sigurd K., author
Type of Resource: text
Genre: Journal Article
Text
Journal Article
Date Issued: 2018-01-10
Physical Form: computer
online resource
Extent: 1 online resource
Language(s): English
Abstract/Description: We apply a messenger field method to solve the linear minimum-variance mapmaking equation in the context of Cosmic Microwave Background (CMB) observations. In simulations, the method produces sky maps that converge significantly faster than those from a conjugate gradient descent algorithm with a diagonal preconditioner, even though the computational cost per iteration is similar. The messenger method recovers large scales in the map better than conjugate gradient descent, and yields a lower overall chi(2). In the single, pencil beam approximation, each iteration of the messenger mapmaking procedure produces an unbiased map, and the iterations become more optimal as they proceed. A variant of the method can handle differential data or perform deconvolution mapmaking. The messenger method requires no preconditioner, but a high-quality solution needs a cooling parameter to control the convergence. We study the convergence properties of this new method and discuss how the algorithm is feasible for the large data sets of current and future CMB experiments.
Identifier: FSU_libsubv1_wos_000419798700009 (IID), 10.3847/1538-4357/aa9c7d (DOI)
Keywords: cosmic background radiation, maker, map-making algorithm, methods: statistical, methods: data analysis, planck, probe wmap observations
Publication Note: The publisher's version of record is available at https://doi.org/10.3847/1538-4357/aa9c7d
Persistent Link to This Record: http://purl.flvc.org/fsu/fd/FSU_libsubv1_wos_000419798700009
Owner Institution: FSU
Is Part Of: Astrophysical Journal.
0004-637X
Issue: iss. 2, vol. 852

Choose the citation style.
Huffenberger, K. M., & Naess, S. K. (2018). Cosmic Microwave Background Mapmaking With A Messenger Field. Astrophysical Journal. Retrieved from http://purl.flvc.org/fsu/fd/FSU_libsubv1_wos_000419798700009