The binned bispectrum estimator: template-based and non-parametric CMB non-Gaussianity searches

doi:http://dx.doi.org/10.1088/1475-7516/016/05/055

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	The binned bispectrum estimator: template-based and non-parametric CMB non-Gaussianity searches
	Bucher, M 1,2; Racine, B 3; van Tent, B 4
刊名	JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
	2016
期号	5 页码:55
关键词	CMBR experiments PRIMORDIAL NON-GAUSSIANITY CMBR theory POLARIZATION ANISOTROPIES non-gaussianity ANGULAR BISPECTRUM PLANCK TEMPERATURE INFLATION
DOI	http://dx.doi.org/10.1088/1475-7516/016/05/055
英文摘要	We describe the details of the binned bispectrum estimator as used for the official 2013 and 2015 analyses of the temperature and polarization CMB maps from the ESA Planck satellite. The defining aspect of this estimator is the determination of a map bispectrum (3-point correlation function) that has been binned in harmonic space. For a parametric determination of the non-Gaussianity in the map (the so-called f(NL), parameters), one takes the inner product of this binned bispectrum with theoretically motivated templates. However, as a complementary approach one can also smooth the binned bispectrum using a variable smoothing scale in order to suppress noise and make coherent features stand out above the noise. This allows one to look in a model-independent way for any statistically significant bispectral signal. This approach is useful for characterizing the bispectral shape of the galactic foreground emission, for which a theoretical prediction of the bispectral anisotropy is lacking, and for detecting a serendipitous primordial signal, for which a theoretical template has not yet been put forth. Both the template-based and the non-parametric approaches are described in this paper.
学科主题	Astronomy & Astrophysics ; Physics
语种	英语
资助机构	French Ministere de l'enseignement superieur et de la recherche ; Research Council of Norway
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/23359]
专题	理论物理研究所_理论物理所1978-2010年知识产出
作者单位	1.Univ Paris Diderot, CNRS IN2P3, CEA Irfu, Observ Paris,Sorbonne Paris Cite,APC,AstroParticu, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France 2.Univ KwaZulu Natal, Sch Math Sci, Astrophys & Cosmol Res Unit, Westville Campus,Private Bag X54001, ZA-4000 Durban, South Africa 3.Chinese Acad Sci, Kavli Inst Theoret Phys China, POB 2735, Beijing 100190, Peoples R China 4.Univ Oslo, Inst Theoret Astrophys, POB 1029, NO-0315 Oslo, Norway 5.Univ Paris 11, Univ Paris Saclay, CNRS, Lab Phys Theor,UMR 8627, Batiment 210, F-91405 Orsay, France
推荐引用方式 GB/T 7714	Bucher, M,Racine, B,van Tent, B. The binned bispectrum estimator: template-based and non-parametric CMB non-Gaussianity searches[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2016(5):55.
APA	Bucher, M,Racine, B,&van Tent, B.(2016).The binned bispectrum estimator: template-based and non-parametric CMB non-Gaussianity searches.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(5),55.
MLA	Bucher, M,et al."The binned bispectrum estimator: template-based and non-parametric CMB non-Gaussianity searches".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .5(2016):55.