Early-type galaxy density profiles from IllustrisTNG - II. Evolutionary trend of the total density profile

doi:10.1093/mnras/stz2907

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	Early-type galaxy density profiles from IllustrisTNG - II. Evolutionary trend of the total density profile
	Wang, Yunchong 1,2,3,4; Vogelsberger, Mark 1; Xu, Dandan 3,5; Shen, Xuejian 6; Mao, Shude 2,3,7; Barnes, David 1; Li, Hui 1; Marinacci, Federico 8; Torrey, Paul 9; Springel, Volker 10
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2019-12-01
卷号	490 期号:4 页码:5722-5738
关键词	methods: numerical Galaxy: evolution galaxies: formation galaxies: structure cosmology: theory
ISSN号	0035-8711
DOI	10.1093/mnras/stz2907
英文摘要	We study the evolutionary trend of the total density profile of early-type galaxies (ETGs) in IllustrisTNG. To this end, we trace ETGs from z = 0 to 4 and measure the power-law slope gamma' of the total density profile for their main progenitors. We find that their slopes gamma' steepen on average during z similar to 4-2, then becoming shallower until z = 1, after which they remain almost constant, aside from a residual trend of becoming shallower towards z = 0. We also compare to a statistical sample of ETGs at different redshifts, selected based on their luminosity profiles and stellar masses. Due to different selection effects, the average slopes of the statistical samples follow a modified evolutionary trend. They monotonically decrease since z = 3, and after z approximate to 1, they remain nearly invariant with a mild increase towards z = 0. These evolutionary trends are mass dependent for both samples, with low-mass galaxies having in general steeper slopes than their more massive counterparts. Galaxies that transitioned to ETGs more recently have steeper mean slopes as they tend to be smaller and more compact at any given redshift. By analysing the impact of mergers and AGN feedback on the progenitors' evolution, we conjecture a multiphase path leading to isothermality in ETGs: dissipation associated with rapid wet mergers tends to steepen gamma' from z = 4 to 2, whereas subsequent AGN feedback (especially in the kinetic mode) makes gamma' shallower again from z = 2 to 1. Afterwards, passive evolution from z = 1 to 0, mainly through gas-poor mergers, mildly decreases gamma' and maintains the overall mass distribution close to isothermal.
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] ; DFG[11761131004] ; NSFC[11761131004] ; National Key Basic Research and Development Programme of China[2018YFA0404501] ; Programme 'Rita Levi Montalcini' of the Italian MIUR
WOS关键词	SUPERMASSIVE BLACK-HOLES ; ACTIVE GALACTIC NUCLEI ; STELLAR ANGULAR-MOMENTUM ; SELF-REGULATED GROWTH ; DARK-MATTER FRACTIONS ; LENS ACS SURVEY ; COSMOLOGICAL SIMULATIONS ; STAR-FORMATION ; ATLAS(3D) PROJECT ; AGN FEEDBACK
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	OXFORD UNIV PRESS
WOS记录号	WOS:000504000300093
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 ; DFG ; DFG ; NSFC ; NSFC ; National Key Basic Research and Development Programme of China ; National Key Basic Research and Development Programme of China ; Programme 'Rita Levi Montalcini' of the Italian MIUR ; Programme 'Rita Levi Montalcini' of the Italian MIUR ; 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 ; DFG ; DFG ; NSFC ; NSFC ; National Key Basic Research and Development Programme of China ; National Key Basic Research and Development Programme of China ; Programme 'Rita Levi Montalcini' of the Italian MIUR ; Programme 'Rita Levi Montalcini' of the Italian MIUR ; 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 ; DFG ; DFG ; NSFC ; NSFC ; National Key Basic Research and Development Programme of China ; National Key Basic Research and Development Programme of China ; Programme 'Rita Levi Montalcini' of the Italian MIUR ; Programme 'Rita Levi Montalcini' of the Italian MIUR ; 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 ; DFG ; DFG ; NSFC ; NSFC ; National Key Basic Research and Development Programme of China ; National Key Basic Research and Development Programme of China ; Programme 'Rita Levi Montalcini' of the Italian MIUR ; Programme 'Rita Levi Montalcini' of the Italian MIUR
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/53928]
专题	中国科学院国家天文台
通讯作者	Wang, Yunchong
作者单位	1.MIT, Dept Phys, Kavli Inst Astrophys & Space Res, Cambridge, MA 02139 USA 2.Tsinghua Univ, Dept Astron, Beijing 100084, Peoples R China 3.Tsinghua Univ, Tsinghua Ctr Astrophys, Beijing 100084, Peoples R China 4.Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China 5.Tsinghua Univ, Inst Adv Studies, Beijing 100084, Peoples R China 6.CALTECH, Div Phys Math & Astron, Pasadena, CA 91125 USA 7.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 8.Univ Bologna, Dept Phys & Astron, Via Gobetti 93-2, I-40129 Bologna, Italy 9.Univ Florida, Dept Astron, Bryant Space Sci Ctr 211, Gainesville, FL 32611 USA 10.Max Planck Inst Astrophys, Karl Schwarzschild Str 1, D-85748 Garching, 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 - II. Evolutionary trend of the total density profile[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2019,490(4):5722-5738.
APA	Wang, Yunchong.,Vogelsberger, Mark.,Xu, Dandan.,Shen, Xuejian.,Mao, Shude.,...&Hernquist, Lars.(2019).Early-type galaxy density profiles from IllustrisTNG - II. Evolutionary trend of the total density profile.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,490(4),5722-5738.
MLA	Wang, Yunchong,et al."Early-type galaxy density profiles from IllustrisTNG - II. Evolutionary trend of the total density profile".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 490.4(2019):5722-5738.