THE DETECTION OF THE LARGE-SCALE ALIGNMENT OF MASSIVE GALAXIES AT z similar to 0.6
文献类型：期刊论文
| 作者 | Li, Cheng1,2; Jing, Y. P.3; Faltenbacher, A.4; Wang, Jie5
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| 刊名 | ASTROPHYSICAL JOURNAL LETTERS
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| 出版日期 | 2013-06-10 |
| 卷号 | 770期号:1 |
| 关键词 | dark matter galaxies: formation galaxies: halos large-scale structure of universe methods: statistical |
| 英文摘要 | We report on the detection of the alignment between galaxies and large-scale structure at z similar to 0.6 based on the CMASS galaxy sample from the Baryon Oscillation Spectroscopy Survey Data Release 9. We use two statistics to quantify the alignment signal: (1) the alignment two-point correlation function that probes the dependence of galaxy clustering at a given separation in redshift space on the projected angle (theta(p)) between the orientation of galaxies and the line connecting to other galaxies, and (2) the cos(2 theta)-statistic that estimates the average of cos(2 theta(p)) for all correlated pairs at a given separation s. We find a significant alignment signal out to about 70 h(-1) Mpc in both statistics. Applications of the same statistics to dark matter halos of mass above 10(12) h(-1) M-circle dot in a large cosmological simulation show scale-dependent alignment signals similar to the observation, but with higher amplitudes at all scales probed. We show that this discrepancy may be partially explained by a misalignment angle between central galaxies and their host halos, though detailed modeling is needed in order to better understand the link between the orientations of galaxies and host halos. In addition, we find systematic trends of the alignment statistics with the stellar mass of the CMASS galaxies, in the sense that more massive galaxies are more strongly aligned with the large-scale structure. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000319723500012 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/5846]  |
| 专题 | 国家天文台_星系宇宙学研究部 |
| 作者单位 | 1.Chinese Acad Sci, Partner Grp, Max Planck Inst Astrophys, Shanghai Astron Observ, Shanghai 200030, Peoples R China 2.Chinese Acad Sci, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China 3.Shanghai Jiao Tong Univ, Dept Phys, Ctr Astron & Astrophys, Shanghai 200240, Peoples R China 4.Univ Witwatersrand, Sch Phys, ZA-2050 Johannesburg, South Africa 5.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Cheng,Jing, Y. P.,Faltenbacher, A.,et al. THE DETECTION OF THE LARGE-SCALE ALIGNMENT OF MASSIVE GALAXIES AT z similar to 0.6[J]. ASTROPHYSICAL JOURNAL LETTERS,2013,770(1). |
| APA | Li, Cheng,Jing, Y. P.,Faltenbacher, A.,&Wang, Jie.(2013).THE DETECTION OF THE LARGE-SCALE ALIGNMENT OF MASSIVE GALAXIES AT z similar to 0.6.ASTROPHYSICAL JOURNAL LETTERS,770(1). |
| MLA | Li, Cheng,et al."THE DETECTION OF THE LARGE-SCALE ALIGNMENT OF MASSIVE GALAXIES AT z similar to 0.6".ASTROPHYSICAL JOURNAL LETTERS 770.1(2013). |
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来源：国家天文台
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