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Jian-Yin Nie Shuang-Nan Zhang Department of Physics Center for Astrophysics Tsinghua University Beijing Key Laboratory of Particle Astrophysics Institute of High Energy Physics Chinese Academy of Sciences Beijing 《中国天文和天体物理学报》2007,7(2):199-208
We apply a Cross-Correlation (CC) method developed previously for detecting gamma-ray point sources to the WMAP first year data by using the Point-Spread Function of WMAP and obtain a full sky CC coefficient map. We find that the CC method is a pow- erful tool to examine the WMAP foreground residuals which can be further cleaned accord- ingly. Evident foreground signals are found in the WMAP foreground cleaned maps and the Tegmark cleaned map. In this process 101 point sources are detected, and 26 of them are new sources additional to the originally listed WMAP 208 sources. We estimate the ?ux of these new sources and verify them by another method. As a result, a revised mask file based on the WMAP first year data is produced by including these new sources. 相似文献
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Valeri Dikarev Oliver Preuß Sami Solanki Harald Krüger Alexander Krivov 《Earth, Moon, and Planets》2008,102(1-4):555-561
Analyses of the cosmic microwave background (CMB) radiation maps produced by the Wilkinson Microwave Anisotropy Probe (WMAP)
have revealed anomalies not predicted by the standard cosmological theory. It has been suggested that a dust cloud in the
vicinity of the Solar system may be the cause for these anomalies. In this paper, the thermal emission by particles from two
known interplanetary meteoroid complexes is tested against the CMB maps. Conclusions are drawn based on the geometry of cloud
projections onto the WMAP sky whether these clouds are likely to explain the observed anomaly. The smooth background Zodiacal
cloud and one of the Taurid meteor complex branches do not explain the WMAP anomaly. 相似文献
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