NAOC Open IR
crosscorrelationsbetween21cmxrayandinfraredbackgrounds
HuanYuan Shan; Bo Qin
2009
Source Publicationresearchinastronomyandastrophysics
ISSN1674-4527
Volume9Issue:1Pages:73
AbstractThe history of the cosmological reionization is still unclear. Two ionizing sources, stars and QSOs, are believed to play important roles during this epoch. Besides the 21 cm signals, the infrared emission from Pop Ⅲ stars and X-ray photons from QSOs can be powerful probes of the reionization. Here we present a cross-correlation study of the 21 cm, infrared and X-ray backgrounds. The advantage of doing such cross-correlations is that we could highlight the correlated signals and eliminate irrelevant fore-grounds. We develop a shell model to describe the 21 cm signals and find that PopⅢ stars can provide higher 21 cm signals than QSOs. Using the ROSAT data for X-ray and AKARI data for infrared, we predict various cross power spectra analytically and dis-cuss prospects for detecting these cross-correlation signals in future low frequency radio surveys. We find that, although these cross-correlational signals have distinct features, so far, they have been difficult to detect due to the high noise of the soft X-ray and infrared backgrounds given by ROSAT and AKARI.
Language英语
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/37551
Collection中国科学院国家天文台
Affiliation中国科学院国家天文台
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
HuanYuan Shan,Bo Qin. crosscorrelationsbetween21cmxrayandinfraredbackgrounds[J]. researchinastronomyandastrophysics,2009,9(1):73.
APA HuanYuan Shan,&Bo Qin.(2009).crosscorrelationsbetween21cmxrayandinfraredbackgrounds.researchinastronomyandastrophysics,9(1),73.
MLA HuanYuan Shan,et al."crosscorrelationsbetween21cmxrayandinfraredbackgrounds".researchinastronomyandastrophysics 9.1(2009):73.
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