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Early-type galaxy density profiles from IllustrisTNG - I. Galaxy correlations and the impact of baryons

文献类型：期刊论文

作者Wang, Yunchong3,4,5; Vogelsberger, Mark3; Xu, Dandan4,5,6; Mao, Shude4,5,7; Springel, Volker8; Li, Hui3; Barnes, David3; Hernquist, Lars9; Pillepich, Annalisa10; Marinacci, Federico9
刊名MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
出版日期2020-02-01
卷号491期号:4页码:5188-5215
ISSN号0035-8711
关键词methods: numerical galaxies: formation galaxies: structure dark matter cosmology: theory
DOI10.1093/mnras/stz3348
英文摘要We explore the isothermal total density profiles of early-type galaxies (ETGs) in the IllustrisTNG simulation. For the selected 559 ETGs at z = 0 with stellar masses 10(10.7) M-circle dot <= M-* <= 10(11.9) M-circle dot, the total power-law slope has amean of = 2.011 +/- 0.007 and a scatter of sigma(gamma') = 0.171 over the radial range 0.4-4 times the stellar half-mass radius. Several correlations between gamma' and galactic properties including stellar mass, effective radius, stellar surface density, central velocity dispersion, central dark matter fraction, and in situ-formed stellar mass ratio are compared to observations and other simulations, revealing that IllustrisTNG reproduces many correlation trends, and in particular, gamma' is almost constant with redshift below z = 2. Through analysing IllustrisTNG model variations, we show that black hole kinetic winds are crucial to lowering gamma' and matching observed galaxy correlations. The effects of stellar winds on gamma' are subdominant compared to active galactic nucleus (AGN) feedback, and differ due to the presence of AGN feedback from previous works. The density profiles of the ETG dark matter haloes are well described by steeper than NFW profiles, and they are steeper in the full physics (FP) run than their counterparts in the dark matter-only (DMO) run. Their inner density slopes anticorrelate (remain constant) with the halo mass in the FP (DMO) run, and anticorrelate with the halo concentration parameter c(200) in both the types of runs. The dark matter haloes of low-mass ETGs are contracted whereas high-mass ETGs are expanded, suggesting that variations in the total density profile occur through the different halo responses to baryons.
WOS关键词DARK-MATTER HALOES ; TO-LIGHT RATIO ; LENS ACS SURVEY ; INITIAL MASS FUNCTION ; LARGE-SCALE STRUCTURE ; COSMOLOGICAL SIMULATIONS ; STELLAR-MASS ; FUNDAMENTAL PLANE ; SIZE EVOLUTION ; BLACK-HOLES
资助项目Tsinghua Xuetang Talents Programme ; MIT RSC award ; Kavli Research Investment Fund ; NASA ATP grant[NNX17AG29G] ; NSF[AST-1814053] ; NSF[AST-1814259] ; National Key Basic Research and Development Programme of China[2018YFA0404501] ; National Science Foundation of China[11821303] ; National Science Foundation of China[11761131004]
WOS研究方向Astronomy & Astrophysics
语种英语
出版者OXFORD UNIV PRESS
WOS记录号WOS:000512310600045
资助机构Tsinghua Xuetang Talents Programme ; Tsinghua Xuetang Talents Programme ; MIT RSC award ; MIT RSC award ; Kavli Research Investment Fund ; Kavli Research Investment Fund ; NASA ATP grant ; NASA ATP grant ; NSF ; NSF ; National Key Basic Research and Development Programme of China ; National Key Basic Research and Development Programme of China ; National Science Foundation of China ; National Science Foundation of China ; Tsinghua Xuetang Talents Programme ; Tsinghua Xuetang Talents Programme ; MIT RSC award ; MIT RSC award ; Kavli Research Investment Fund ; Kavli Research Investment Fund ; NASA ATP grant ; NASA ATP grant ; NSF ; NSF ; National Key Basic Research and Development Programme of China ; National Key Basic Research and Development Programme of China ; National Science Foundation of China ; National Science Foundation of China ; Tsinghua Xuetang Talents Programme ; Tsinghua Xuetang Talents Programme ; MIT RSC award ; MIT RSC award ; Kavli Research Investment Fund ; Kavli Research Investment Fund ; NASA ATP grant ; NASA ATP grant ; NSF ; NSF ; National Key Basic Research and Development Programme of China ; National Key Basic Research and Development Programme of China ; National Science Foundation of China ; National Science Foundation of China ; Tsinghua Xuetang Talents Programme ; Tsinghua Xuetang Talents Programme ; MIT RSC award ; MIT RSC award ; Kavli Research Investment Fund ; Kavli Research Investment Fund ; NASA ATP grant ; NASA ATP grant ; NSF ; NSF ; National Key Basic Research and Development Programme of China ; National Key Basic Research and Development Programme of China ; National Science Foundation of China ; National Science Foundation of China
源URL[http://ir.bao.ac.cn/handle/114a11/53995]  
专题中国科学院国家天文台
通讯作者Wang, Yunchong
作者单位1.Univ Florida, Dept Astron, 211 Bryant Space Sci Ctr, Gainesville, FL 32611 USA
2.Heidelberg Inst Theoret Studies, Schloss Wolfsbrunnenweg 35, D-69118 Heidelberg, Germany
3.MIT, Dept Phys, Kavli Inst Astrophys & Space Res, Cambridge, MA 02139 USA
4.Tsinghua Univ, Dept Astron, Beijing 100084, Peoples R China
5.Tsinghua Univ, Ctr Astrophys, Beijing 100084, Peoples R China
6.Tsinghua Univ, Inst Adv Studies, Beijing 100084, Peoples R China
7.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
8.Max Planck Inst Astrophys, Karl Schwarzschild Str 1, D-85748 Garching, Germany
9.Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA
10.Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany
推荐引用方式
GB/T 7714		 Wang, Yunchong,Vogelsberger, Mark,Xu, Dandan,et al. Early-type galaxy density profiles from IllustrisTNG - I. Galaxy correlations and the impact of baryons[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2020,491(4):5188-5215.
APA Wang, Yunchong.,Vogelsberger, Mark.,Xu, Dandan.,Mao, Shude.,Springel, Volker.,...&Torrey, Paul.(2020).Early-type galaxy density profiles from IllustrisTNG - I. Galaxy correlations and the impact of baryons.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,491(4),5188-5215.
MLA Wang, Yunchong,et al."Early-type galaxy density profiles from IllustrisTNG - I. Galaxy correlations and the impact of baryons".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 491.4(2020):5188-5215.

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来源：国家天文台

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