SIGNIFICANT FOREGROUND UNRELATED NON-ACOUSTIC ANISOTROPY ON THE 1 DEGREE SCALE IN WILKINSON MICROWAVE ANISOTROPY PROBE 5-YEAR OBSERVATIONS
文献类型：期刊论文
| 作者 | Jiang, BZ; Lieu, R; Zhang SN(张双南) ; Zhang, SN; Wakker, B
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2010 |
| 卷号 | 708期号:1页码:375-380 |
| 关键词 | cosmic microwave background ISM: clouds methods: data analysis |
| 通讯作者 | [Jiang, Bi-Zhu ; Zhang, Shuang-Nan] Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China ; [Jiang, Bi-Zhu ; Zhang, Shuang-Nan] Tsinghua Univ, Ctr Astrophys, Beijing 100084, Peoples R China ; [Jiang, Bi-Zhu ; Lieu, Richard ; Zhang, Shuang-Nan] Univ Alabama, Dept Phys, Huntsville, AL 35899 USA ; [Zhang, Shuang-Nan] Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, Beijing, Peoples R China ; [Wakker, Bart] Univ Wisconsin, Dept Astron, Madison, WI 53706 USA |
| 英文摘要 | The spectral variation of the cosmic microwave background (CMB) as observed by WMAP was tested using foreground reduced WMAP5 data, by producing subtraction maps at the 1 degrees angular resolution between the two cosmological bands of V and W, for masked sky areas that avoid the Galactic disk. The resulting V-W map revealed a non-acoustic signal over and above the WMAP5 pixel noise, with two main properties. First, it possesses quadrupole power at the approximate to 1 mu K level which may be attributed to foreground residuals. Second, it fluctuates also at all values of l > 2, especially on the 1 degrees scale (200 less than or similar to l less than or similar to 300). The behavior is random and symmetrical about zero temperature with an rms approximate to 7 mu K, or 10% of the maximum CMB anisotropy, which would require a "cosmic conspiracy" among the foreground components if it is a consequence of their existence. Both anomalies must be properly diagnosed and corrected if "precision" cosmology is the claim. The second anomaly is, however, more interesting because it opens the question on whether the CMB anisotropy genuinely represents primordial density seeds. |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 原文出处 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000272790400033 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/237225]  |
| 专题 | 高能物理研究所_粒子天体物理中心 |
| 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 | Jiang, BZ,Lieu, R,Zhang SN,et al. SIGNIFICANT FOREGROUND UNRELATED NON-ACOUSTIC ANISOTROPY ON THE 1 DEGREE SCALE IN WILKINSON MICROWAVE ANISOTROPY PROBE 5-YEAR OBSERVATIONS[J]. ASTROPHYSICAL JOURNAL,2010,708(1):375-380. |
| APA | Jiang, BZ,Lieu, R,张双南,Zhang, SN,&Wakker, B.(2010).SIGNIFICANT FOREGROUND UNRELATED NON-ACOUSTIC ANISOTROPY ON THE 1 DEGREE SCALE IN WILKINSON MICROWAVE ANISOTROPY PROBE 5-YEAR OBSERVATIONS.ASTROPHYSICAL JOURNAL,708(1),375-380. |
| MLA | Jiang, BZ,et al."SIGNIFICANT FOREGROUND UNRELATED NON-ACOUSTIC ANISOTROPY ON THE 1 DEGREE SCALE IN WILKINSON MICROWAVE ANISOTROPY PROBE 5-YEAR OBSERVATIONS".ASTROPHYSICAL JOURNAL 708.1(2010):375-380. |
入库方式： OAI收割
来源：高能物理研究所
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