Projection effects in the strong lensing study of subhaloes
文献类型：期刊论文
| 作者 | Li, Ran1,2 ; Frenk, Carlos S.3; Cole, Shaun3; Wang, Qiao1; Gao, Liang1
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| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2017-06-01 |
| 卷号 | 468期号:2页码:1426-1432 |
| 关键词 | gravitational lensing: strong galaxies: haloes dark matter |
| 英文摘要 | The defining characteristic of the cold dark matter (CDM) hypothesis is the presence of a very large number of low-mass haloes, too small to have made a visible galaxy. Other hypotheses for the nature of the dark matter, such as warm dark matter (WDM), predict a much smaller number of such low-mass haloes. Strong lensing systems offer the possibility of detecting small-mass haloes through the distortions they induce in the lensed image. Here, we show that the main contribution to the image distortions comes from haloes along the line of sight rather than subhaloes in the lens as has normally been assumed so far. These interlopers enhance the differences between the predictions of CDM and WDM models. We derive the total perturber mass function, including both subhaloes and interlopers, and show that measurements of approximately 20 strong lens systems with a detection limit of M-low = 10(7) h(-1) M-circle dot would distinguish (at 3 sigma) between CDM and a WDM model consisting of 7 keV sterile neutrinos such as those required to explain the recently detected 3.5 keV X-ray emission line from the centres of galaxies and clusters. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | WARM DARK-MATTER ; SATELLITE GALAXIES ; MASS FUNCTION ; COPERNICUS COMPLEXIO ; SUBSTRUCTURE ; HALOES ; STATISTICS ; UNIVERSE ; MODELS ; LINE |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000399429600014 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/8843]  |
| 专题 | 国家天文台_星系宇宙学研究部 |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Computat Astrophys, Natl Astron Observ, Beijing 100012, Peoples R China 2.Univ Chinese Acad Sci, Coll Astron & Space Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China 3.Univ Durham, Inst Computat Cosmol, Dept Phys, South Rd, Durham DH1 3LE, England |
| 推荐引用方式 GB/T 7714 | Li, Ran,Frenk, Carlos S.,Cole, Shaun,et al. Projection effects in the strong lensing study of subhaloes[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2017,468(2):1426-1432. |
| APA | Li, Ran,Frenk, Carlos S.,Cole, Shaun,Wang, Qiao,&Gao, Liang.(2017).Projection effects in the strong lensing study of subhaloes.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,468(2),1426-1432. |
| MLA | Li, Ran,et al."Projection effects in the strong lensing study of subhaloes".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 468.2(2017):1426-1432. |
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来源：国家天文台
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