The galaxy population in cold and warm dark matter cosmologies
文献类型：期刊论文
| 作者 | Wang, Lan1 ; Gonzalez-Perez, Violeta2,3; Xie, Lizhi4; Cooper, Andrew P.2; Frenk, Carlos S.2; Gao, Liang1; Hellwing, Wojciech A.3,5; Helly, John2; Lovell, Mark R.6,7; Jiang, Lilian2
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| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 出版日期 | 2017-07-01 |
| 卷号 | 468期号:4页码:4579-4591 |
| 关键词 | galaxies: abundances galaxies: formation galaxies: high-redshift dark matter |
| 英文摘要 | We use a pair of high-resolution N-body simulations implementing two dark matter models, namely the standard cold dark matter (CDM) cosmogony and a warm dark matter (WDM) alternative where the dark matter particle is a 1.5 keV thermal relic. We combine these simulations with the GALFORM semi-analytical galaxy formation model to explore differences between the resulting galaxy populations. We use GALFORM model variants for CDM and WDM that result in the same z = 0 galaxy stellar mass function by construction. We find that most of the studied galaxy properties have the same values in these two models, indicating that both dark matter scenarios match current observational data equally well. Even in underdense regions, where discrepancies in structure formation between CDM and WDM are expected to be most pronounced, the galaxy properties are only slightly different. The only significant difference in the local universe we find is in the galaxy populations of 'Local Volumes', regions of radius 1-8 Mpc around simulated MilkyWay analogues. In such regions, our WDM model provides a better match to observed local galaxy number counts and is five times more likely than the CDM model to predict subregions within them that are as empty as the observed Local Void. Thus, a highly complete census of the Local Volume and future surveys of void regions could provide constraints on the nature of dark matter. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | STELLAR MASS FUNCTION ; MILKY-WAY SATELLITES ; LAMBDA-CDM ; COPERNICUS COMPLEXIO ; DWARF SPHEROIDALS ; COSMIC EVOLUTION ; MERGER HISTORIES ; FORMATION MODELS ; REDSHIFT SURVEY ; ASSEMBLY GAMA |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000402819700065 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/8810]  |
| 专题 | 国家天文台_星系宇宙学研究部 |
| 作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, Key Lab Computat Astrophys, Datun Rd 20A, Beijing 100012, Peoples R China 2.Univ Durham, Dept Phys, Inst Computat Cosmol, South Rd, Durham DH1 3LE, England 3.Univ Portsmouth, Inst Cosmol & Gravitat, Burnaby Rd, Portsmouth PO1 3FX, Hants, England 4.INAF Astron Observ Trieste, Via GB Tiepolo 11, I-34143 Trieste, Italy 5.Univ Zielona Gora, Janusz Gil Inst Astron, Ul Szafrana 2, PL-65516 Zielona Gora, Poland 6.Univ Amsterdam, GRAPPA, Sci Pk 904, NL-1098XH Amsterdam, Netherlands 7.Inst Lorentz Theoret Phys, Niels Bohrweg 2, NL-2333CA Leiden, Netherlands |
| 推荐引用方式 GB/T 7714 | Wang, Lan,Gonzalez-Perez, Violeta,Xie, Lizhi,et al. The galaxy population in cold and warm dark matter cosmologies[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2017,468(4):4579-4591. |
| APA | Wang, Lan.,Gonzalez-Perez, Violeta.,Xie, Lizhi.,Cooper, Andrew P..,Frenk, Carlos S..,...&Jiang, Lilian.(2017).The galaxy population in cold and warm dark matter cosmologies.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,468(4),4579-4591. |
| MLA | Wang, Lan,et al."The galaxy population in cold and warm dark matter cosmologies".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 468.4(2017):4579-4591. |
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来源：国家天文台
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