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

doi:http://dx.doi.org/10.1088/1475-7516/2016/05/055

ITP OpenIR > 理论物理所科研产出 > SCI论文

	Bucher, M; Racine, B; van Tent, B; Bucher, M (reprint author), 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.
	The binned bispectrum estimator: template-based and non-parametric CMB non-Gaussianity searches
发表期刊	JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
语种	英语
关键词	Cmbr Experiments Cmbr Theory Non-gaussianity
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.
	2016
期号	5 页码:55
学科领域	Astronomy & Astrophysics ; Physics
DOI	http://dx.doi.org/10.1088/1475-7516/2016/05/055
收录类别	SCI
项目资助者	French Ministere de l'enseignement superieur et de la recherche ; French Ministere de l'enseignement superieur et de la recherche ; French Ministere de l'enseignement superieur et de la recherche ; French Ministere de l'enseignement superieur et de la recherche ; Research Council of Norway ; Research Council of Norway ; Research Council of Norway ; Research Council of Norway
引用统计
文献类型	期刊论文
条目标识符	http://ir.itp.ac.cn/handle/311006/21669
专题	理论物理所科研产出_SCI论文
通讯作者	Bucher, M (reprint author), 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.
推荐引用方式 GB/T 7714	Bucher, M,Racine, B,van Tent, B,et al. 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,&Bucher, M .(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.

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