E and B families of the Stokes parameters in the polarized synchrotron and thermal dust foregrounds

doi:10.1088/1475-7516/2018/05/059

CORC > 高能物理研究所 > 中国科学院高能物理研究所 > 粒子天体物理中心

	E and B families of the Stokes parameters in the polarized synchrotron and thermal dust foregrounds
	James, Creswell; Hao, Liu; Liu H(刘浩); Pavel, Naselsky
刊名	JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
	2018
期号	5 页码:59
关键词	CMBR experiments gravitational waves and CMBR polarization
ISSN号	1475-7516
DOI	10.1088/1475-7516/2018/05/059
文献子类	Article
英文摘要	Better understanding of Galactic foregrounds is one of the main obstacles to detection of primordial gravitational waves through measurement of the B mode in the polarized microwave sky. We generalize the method proposed in [1] and decompose the polarization signals into the E and B families directly in the domain of the Stokes Q, U parameters as (Q, U) equivalent to (Q(E), U-E)+(Q(B), U-B). This also enables an investigation of the morphology and the frequency dependence of these two families, which has been done in the WMAP K, Ka (tracing synchrotron emission) and Planck 2015 HFI maps (tracing thermal dust). The results reveal significant differences in spectra between the E and B families. The spectral index of the E family fluctuates less across the sky than that of the B family, and the same tendency occurs for the polarization angles of the dust and synchrotron channels. The new insight from WMAP and Planck data on the North Polar Spur and BICEP2 zones through our method clearly indicates that these zones are characterized by very low polarization intensity of the B family compared to the E family. We have detected global structure of the B family polarization angles at high Galactic latitudes which cannot be attributed to the cosmic microwave background or instrumental noise. However, we cannot exclude instrumental systematics as a partial contributor to these anomalies.
WOS研究方向	Astronomy & Astrophysics ; Physics
语种	英语
WOS记录号	WOS:000456484800001
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/286793]
专题	高能物理研究所_粒子天体物理中心
通讯作者	Liu H(刘浩)
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	James, Creswell,Hao, Liu,Liu H,et al. E and B families of the Stokes parameters in the polarized synchrotron and thermal dust foregrounds[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2018(5):59.
APA	James, Creswell,Hao, Liu,刘浩,&Pavel, Naselsky.(2018).E and B families of the Stokes parameters in the polarized synchrotron and thermal dust foregrounds.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(5),59.
MLA	James, Creswell,et al."E and B families of the Stokes parameters in the polarized synchrotron and thermal dust foregrounds".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .5(2018):59.