Substructure and galaxy formation in the Copernicus Complexio warm dark matter simulations
文献类型：期刊论文
| 作者 | Bose, Sownak1; Hellwing, Wojciech A.2,3; Frenk, Carlos S.1; Jenkins, Adrian1; Lovell, Mark R.4,5; Helly, John C.1; Li, Baojiu1; Gonzalez-Perez, Violeta2; Gao, Liang1,6
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| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 出版日期 | 2017-02-01 |
| 卷号 | 464期号:4页码:4520-4533 |
| 关键词 | methods: numerical galaxies: evolution galaxies: high redshift dark matter |
| 英文摘要 | We use the Copernicus Complexio (COCO) high-resolution N-body simulations to investigate differences in the properties of small-scale structures in the standard cold dark matter (CDM) model and in a model with a cutoff in the initial power spectrum of density fluctuations consistent with both a thermally produced warm dark matter (WDM) particle with a rest mass of 3.3 keV and a sterile neutrino with mass 7 keV and leptogenesis parameter L-6 = 8.7. The latter corresponds to the 'coldest' model with this sterile neutrino mass compatible with the identification of the recently detected 3.5 keV X-ray line as resulting from particle decay. CDM and WDM predict very different number densities of subhaloes with mass less than or similar to 10(9) h(-1) M-circle dot although they predict similar, nearly universal, normalized subhalo radial density distributions. Haloes and subhaloes in both models have cuspy Navarro-Frenk-White profiles, but WDM subhaloes below the cut-off scale in the power spectrum (corresponding to maximum circular velocities V (z= 0)(max) <= 50 kms(-1)) are less concentrated than their CDM counterparts. We make predictions for observable properties using the GALFORM semi-analytic model of Galaxy formation. Both models predict Milky Way satellite luminosity functions consistent with observations, although the WDM model predicts fewer very faint satellites. This model, however, predicts slightly more UV bright galaxies at redshift z > 7 than CDM, but both are consistent with observations. Gravitational lensing offers the best prospect of distinguishing between the models. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | MILKY-WAY SATELLITES ; SIMILAR-TO 7 ; HALO OCCUPATION DISTRIBUTION ; UV LUMINOSITY FUNCTION ; REDSHIFT SURVEY ; STERILE NEUTRINOS ; INNER STRUCTURE ; MASS FUNCTION ; LOCAL GROUP ; COSMOLOGICAL SIMULATIONS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000393780500054 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/8242]  |
| 专题 | 国家天文台_星系宇宙学研究部 |
| 作者单位 | 1.Univ Durham, Inst Computat Cosmol, South Rd, Durham DH1 3LE, England 2.Univ Portsmouth, Inst Cosmol & Gravitat, Portsmouth PO1 3FX, Hants, England 3.Univ Zielona Gora, Janusz Gil Inst Astron, Ul Szafrana 2, PL-65516 Zielona Gora, Poland 4.Univ Amsterdam, GRAPPA Inst, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands 5.Inst Lorentz Theoret Phys, Niels Bohrweg 2, NL-2333 CA Leiden, Netherlands 6.Chinese Acad Sci, Natl Astron Observ, 20A Datun Rd, Beijing 100012, Peoples R China |
| 推荐引用方式 GB/T 7714 | Bose, Sownak,Hellwing, Wojciech A.,Frenk, Carlos S.,et al. Substructure and galaxy formation in the Copernicus Complexio warm dark matter simulations[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2017,464(4):4520-4533. |
| APA | Bose, Sownak.,Hellwing, Wojciech A..,Frenk, Carlos S..,Jenkins, Adrian.,Lovell, Mark R..,...&Gao, Liang.(2017).Substructure and galaxy formation in the Copernicus Complexio warm dark matter simulations.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,464(4),4520-4533. |
| MLA | Bose, Sownak,et al."Substructure and galaxy formation in the Copernicus Complexio warm dark matter simulations".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 464.4(2017):4520-4533. |
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来源：国家天文台
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