Comparing galaxy morphology in hydrodynamical simulation and in semi-analytic model
文献类型：期刊论文
| 作者 | Wang, Lan1 ; Xu, Dandan2,3; Gao, Liang1,4; Guo, Qi1,4; Qu, Yan1; Pan, Jun1
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| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 出版日期 | 2019-05-01 |
| 卷号 | 485期号:2页码:2083-2091 |
| 关键词 | galaxies: evolution galaxies: formation |
| ISSN号 | 0035-8711 |
| DOI | 10.1093/mnras/stz529 |
| 英文摘要 | We compare galaxy morphology predicted by the Illustris hydrodynamical simulation and a semi-analytic model (SAM) grafted in the halo merger trees from the Illustris-Dark matter simulation. Morphology is classified according to the luminous profile and the kinematic bulge-to-total ratio for Illustris galaxy, and the bulge-to-total stellar mass ratio for SAM galaxy. For late-type galaxies in the Illustris catalogue, most of their counterparts in the SAM model have the same type, and the consistency between two models is higher for lower mass galaxies. For early-type (ET) galaxies in Illustris, the consistency is quite low for the counterparts except for most massive galaxies. By comparing in detail the growth histories of some matched galaxy pairs of MilkyWay mass in Illustris and the SAM model, we notice two aspects of differences in determining galaxy morphology between the two galaxy formation implementations. First, in the SAM, major merger and frequent minor mergers result in the growth of bulges and turn the galaxy into ET, while bulge formation is not connected to mergers as tightly as in SAM for the Illustris galaxies. In addition, the satellite stellar mass can decrease significantly due to tidal stripping before merging into the central galaxy in Illustris, while it does not decrease in the SAM model. This results in less mergers with large (stellar) mass ratios in the Illustris simulation, and less effect of mergers on shaping galaxy morphology. |
| WOS关键词 | ILLUSTRIS SIMULATION ; BLACK-HOLES ; EVOLUTION ; POPULATION ; PROJECT ; DARK ; LUMINOSITIES ; CLUSTER ; MATTER |
| 资助项目 | National Natural Science Foundation of China[11573033] ; National Natural Science Foundation of China[11622325] ; National Natural Science Foundation of China[11573031] ; National Key Program for Science and Technology Research and Development[2017YFB0203300] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000474886200043 |
| 出版者 | OXFORD UNIV PRESS |
| 资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Program for Science and Technology Research and Development ; National Key Program for Science and Technology Research and Development ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Program for Science and Technology Research and Development ; National Key Program for Science and Technology Research and Development ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Program for Science and Technology Research and Development ; National Key Program for Science and Technology Research and Development ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Program for Science and Technology Research and Development ; National Key Program for Science and Technology Research and Development |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/26975]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Wang, Lan |
| 作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, Key Lab Computat Astrophys, Datun Rd 20A, Beijing 100012, Peoples R China 2.Tsinghua Univ, Inst Adv Studies, Beijing 100084, Peoples R China 3.Tsinghua Univ, Tsinghua Ctr Astrophys, Beijing 100084, Peoples R China 4.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Lan,Xu, Dandan,Gao, Liang,et al. Comparing galaxy morphology in hydrodynamical simulation and in semi-analytic model[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2019,485(2):2083-2091. |
| APA | Wang, Lan,Xu, Dandan,Gao, Liang,Guo, Qi,Qu, Yan,&Pan, Jun.(2019).Comparing galaxy morphology in hydrodynamical simulation and in semi-analytic model.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,485(2),2083-2091. |
| MLA | Wang, Lan,et al."Comparing galaxy morphology in hydrodynamical simulation and in semi-analytic model".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 485.2(2019):2083-2091. |
入库方式： OAI收割
来源：国家天文台
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