Fast Estimator Of Primordial Non-Gaussianity From Temperature And Polarization Anisotropies In The Cosmic Microwave Background. II. Partial Sky Coverage And Inhomogeneous Noise

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dc.contributor.utaustinauthorKomatsu, Eiichiroen_US
dc.creatorYadav, Amit P. S.en_US
dc.creatorKomatsu, Eiichiroen_US
dc.creatorWandelt, Benjamin D.en_US
dc.creatorLiguori, Micheleen_US
dc.creatorHansen, Frode K.en_US
dc.creatorMatarrese, Sabinoen_US
dc.date.accessioned2016-04-28T19:39:01Z
dc.date.available2016-04-28T19:39:01Z
dc.date.issued2008-05en
dc.description.abstractIn the recent paper by Yadav and coworkers we described a fast cubic (bispectrum) estimator of the amplitude of primordial non-Gaussianity of local type, f(NL), from a combined analysis of the cosmic microwave background (CMB) temperature and E-polarization observations. In this paper we generalize the estimator to deal with a partial sky coverage as well as inhomogeneous noise. Our generalized estimator is still computationally efficient, scaling as O(N-pix(3/2)) compared to the O(N-pix(5/2)) scaling of the brute- force bispectrum calculation for sky maps with Npix pixels. Upcoming CMB experiments are expected to yield high- sensitivity temperature and E- polarization data. Our generalized estimator will allow us to optimally utilize the combined CMB temperature and E- polarization information from these realistic experiments and to constrain primordial non- Gaussianity.en_US
dc.description.departmentAstronomyen_US
dc.description.sponsorshipNSF AST 05-07676, AST 07-08849en_US
dc.identifierdoi:10.15781/T2VV5B
dc.identifier.Filename2008_05_fastestimator.pdfen_US
dc.identifier.citationYadav, Amit PS, Eiichiro Komatsu, Benjamin D. Wandelt, Michele Liguori, Frode K. Hansen, and Sabino Matarrese. "Fast estimator of primordial non-Gaussianity from temperature and polarization anisotropies in the cosmic microwave background. II. Partial sky coverage and inhomogeneous noise." The Astrophysical Journal, Vol. 678, No. 2 (May., 2008): 578.en_US
dc.identifier.doi10.1086/586695en_US
dc.identifier.issn0004-637Xen_US
dc.identifier.urihttp://hdl.handle.net/2152/35021
dc.language.isoEnglishen_US
dc.relation.ispartofen_US
dc.relation.ispartofserialAstrophysical Journalen_US
dc.rightsAdministrative deposit of works to Texas ScholarWorks: This works author(s) is or was a University faculty member, student or staff member; this article is already available through open access or the publisher allows a PDF version of the article to be freely posted online. The library makes the deposit as a matter of fair use (for scholarly, educational, and research purposes), and to preserve the work and further secure public access to the works of the University.en_US
dc.rights.restrictionOpenen_US
dc.subjectcosmic microwave backgrounden_US
dc.subjectearly universeen_US
dc.subjectprobe wmap observationsen_US
dc.subject3-point correlation-functionen_US
dc.subjectinflationaryen_US
dc.subjectmodelsen_US
dc.subjectastronomy & astrophysicsen_US
dc.titleFast Estimator Of Primordial Non-Gaussianity From Temperature And Polarization Anisotropies In The Cosmic Microwave Background. II. Partial Sky Coverage And Inhomogeneous Noiseen_US
dc.typeArticleen_US

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