Combining maximum-entropy and the Mexican hat wavelet to reconstruct the microwave sky

We present a maximum-entropy method (MEM) and `Mexican hat' wavelet (MHW) joint analysis to recover the different components of the microwave sky from simulated observations by the ESA Planck Surveyor satellite in a small patch of the sky …12:8 12:8deg2†. This combined method allows one to impr...

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Detalhes bibliográficos
Autores: Vielva, Patricio, Barreiro, R. Belén, Hobson, M. P., Martínez-González, Enrique, Lasenby, Anthony N., Sanz, J. L., Toffolatti, Luigi
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2001
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/385656
Acesso em linha:http://hdl.handle.net/10261/385656
Access Level:acceso abierto
Palavra-chave:Methods: data analysis
Techniques: image processing
Cosmic microwave background
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spelling Combining maximum-entropy and the Mexican hat wavelet to reconstruct the microwave skyVielva, PatricioBarreiro, R. BelénHobson, M. P.Martínez-González, EnriqueLasenby, Anthony N.Sanz, J. L.Toffolatti, LuigiMethods: data analysisTechniques: image processingCosmic microwave backgroundWe present a maximum-entropy method (MEM) and `Mexican hat' wavelet (MHW) joint analysis to recover the different components of the microwave sky from simulated observations by the ESA Planck Surveyor satellite in a small patch of the sky …12:8 12:8deg2†. This combined method allows one to improve the CMB, Sunyaev±Zel'dovich and Galactic foregrounds separation achieved by the MEM technique alone. In particular, the reconstructed CMB map is free from any bright point-source contamination. The joint analysis also produces point-source catalogues at each Planck frequency that are more complete and accurate than those obtained by either method on its own. The results are especially improved at high frequencies where infrared galaxies dominate the point-source contribution. Although this joint technique has been performed on simulated Planck data, it could easily be applied to other multifrequency CMB experiments, such as the forthcoming NASAMAPsatellite or the recently-performed BOOMERANG and MAXIMA experiments.RBB acknowledges financial support from the PPARC in the form of a research grant. PV, EMG, JLS and LT thank Spanish DGESIC Project no. PB98-0531-c02-01 for partial support. EMG and JLS thank FEDER Project no. 1FD97-1769-c04-01 and EEC Project INTASOPEN-97-1192 for partial financial support.Peer reviewedOxford University PressDirección General de Enseñanza Superior e Investigación Científica (España)European CommissionConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202520252001info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://hdl.handle.net/10261/385656reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttps://doi.org/10.1046/j.1365-8711.2001.04693.xSíinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3856562026-05-22T06:33:51Z
dc.title.none.fl_str_mv Combining maximum-entropy and the Mexican hat wavelet to reconstruct the microwave sky
title Combining maximum-entropy and the Mexican hat wavelet to reconstruct the microwave sky
spellingShingle Combining maximum-entropy and the Mexican hat wavelet to reconstruct the microwave sky
Vielva, Patricio
Methods: data analysis
Techniques: image processing
Cosmic microwave background
title_short Combining maximum-entropy and the Mexican hat wavelet to reconstruct the microwave sky
title_full Combining maximum-entropy and the Mexican hat wavelet to reconstruct the microwave sky
title_fullStr Combining maximum-entropy and the Mexican hat wavelet to reconstruct the microwave sky
title_full_unstemmed Combining maximum-entropy and the Mexican hat wavelet to reconstruct the microwave sky
title_sort Combining maximum-entropy and the Mexican hat wavelet to reconstruct the microwave sky
dc.creator.none.fl_str_mv Vielva, Patricio
Barreiro, R. Belén
Hobson, M. P.
Martínez-González, Enrique
Lasenby, Anthony N.
Sanz, J. L.
Toffolatti, Luigi
author Vielva, Patricio
author_facet Vielva, Patricio
Barreiro, R. Belén
Hobson, M. P.
Martínez-González, Enrique
Lasenby, Anthony N.
Sanz, J. L.
Toffolatti, Luigi
author_role author
author2 Barreiro, R. Belén
Hobson, M. P.
Martínez-González, Enrique
Lasenby, Anthony N.
Sanz, J. L.
Toffolatti, Luigi
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv Dirección General de Enseñanza Superior e Investigación Científica (España)
European Commission
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Methods: data analysis
Techniques: image processing
Cosmic microwave background
topic Methods: data analysis
Techniques: image processing
Cosmic microwave background
description We present a maximum-entropy method (MEM) and `Mexican hat' wavelet (MHW) joint analysis to recover the different components of the microwave sky from simulated observations by the ESA Planck Surveyor satellite in a small patch of the sky …12:8 12:8deg2†. This combined method allows one to improve the CMB, Sunyaev±Zel'dovich and Galactic foregrounds separation achieved by the MEM technique alone. In particular, the reconstructed CMB map is free from any bright point-source contamination. The joint analysis also produces point-source catalogues at each Planck frequency that are more complete and accurate than those obtained by either method on its own. The results are especially improved at high frequencies where infrared galaxies dominate the point-source contribution. Although this joint technique has been performed on simulated Planck data, it could easily be applied to other multifrequency CMB experiments, such as the forthcoming NASAMAPsatellite or the recently-performed BOOMERANG and MAXIMA experiments.
publishDate 2001
dc.date.none.fl_str_mv 2001
2025
2025
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/385656
url http://hdl.handle.net/10261/385656
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv https://doi.org/10.1046/j.1365-8711.2001.04693.x
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Oxford University Press
publisher.none.fl_str_mv Oxford University Press
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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