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A study of stellar orbit fractions: simulated IllustrisTNG galaxies compared to CALIFA observations

文献类型：期刊论文

作者Xu, Dandan2,3; Zhu, Ling4; Grand, Robert5; Springel, Volker5; Mao, Shude3,6,7; van de Ven, Glenn8; Lu, Shengdong7; Wang, Yougang7; Pillepich, Annalisa9; Genel, Shy10,11
刊名MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
出版日期2019-10-01
卷号489期号:1页码:842-854
关键词galaxies: elliptical and lenticular, cD galaxies: kinematics and dynamics galaxies: spiral galaxies: stellar content galaxies: structure
ISSN号0035-8711
DOI10.1093/mnras/stz2164
英文摘要Motivated by the recently discovered kinematic 'Hubble sequence' shown by the stellar orbit-circularity distribution of 260 CALIFA galaxies, we make use of a comparable galaxy sample at z = 0 with a stellar mass range of M-*/M-circle dot is an element of [10(9.7), 10(11.4)] selected from the IllustrisTNG simulation and study their stellar orbit compositions in relation to a number of other fundamental galaxy properties. We find that the TNG100 simulation broadly reproduces the observed fractions of different orbital components and their stellar mass dependences. In particular, the mean mass dependences of the luminosity fractions for the kinematically warm and hot orbits are well reproduced within model uncertainties of the observed galaxies. The simulation also largely reproduces the observed peak and trough features at M-* approximate to 1-2 x 10(10) M-circle dot in the mean distributions of the cold- and hot-orbit fractions, respectively, indicating fewer cooler orbits and more hotter orbits in both more- and less-massive galaxies beyond such a mass range. Several marginal disagreements are seen between the simulation and observations: the average cold-orbit (counter-rotating) fractions of the simulated galaxies below (above) M-* approximate to 6 x 10(10) M-circle dot are systematically higher than the observational data by less than or similar to 10 per cent (absolute orbital fraction); the simulation also seems to produce more scatter for the cold-orbit fraction and less so for the non-cold orbits at any given galaxy mass. Possible causes that stem from the adopted heating mechanisms are discussed.
WOS关键词STAR-FORMATION HISTORIES ; COSMOLOGICAL SIMULATIONS ; MASSIVE GALAXIES ; SPIN SWINGS ; EVOLUTION ; MODEL ; DISK ; PROJECT ; MERGERS ; MATTER
资助项目DFG[11761131004] ; NSFC[11761131004] ; NSFC[11773034] ; NSFC[11390372] ; National Key Basic Research and Development Program of China[2018YFA0404501] ; Shanghai Astronomical Observatory, Chinese Academy of Sciences[Y895201009] ; European Research Council (ERC) under the European Union[724857] ; Program 'Rita Levi Montalcini' of the Italian MIUR
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:000489292800062
出版者OXFORD UNIV PRESS
资助机构DFG ; DFG ; NSFC ; NSFC ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; Shanghai Astronomical Observatory, Chinese Academy of Sciences ; Shanghai Astronomical Observatory, Chinese Academy of Sciences ; European Research Council (ERC) under the European Union ; European Research Council (ERC) under the European Union ; Program 'Rita Levi Montalcini' of the Italian MIUR ; Program 'Rita Levi Montalcini' of the Italian MIUR ; DFG ; DFG ; NSFC ; NSFC ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; Shanghai Astronomical Observatory, Chinese Academy of Sciences ; Shanghai Astronomical Observatory, Chinese Academy of Sciences ; European Research Council (ERC) under the European Union ; European Research Council (ERC) under the European Union ; Program 'Rita Levi Montalcini' of the Italian MIUR ; Program 'Rita Levi Montalcini' of the Italian MIUR ; DFG ; DFG ; NSFC ; NSFC ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; Shanghai Astronomical Observatory, Chinese Academy of Sciences ; Shanghai Astronomical Observatory, Chinese Academy of Sciences ; European Research Council (ERC) under the European Union ; European Research Council (ERC) under the European Union ; Program 'Rita Levi Montalcini' of the Italian MIUR ; Program 'Rita Levi Montalcini' of the Italian MIUR ; DFG ; DFG ; NSFC ; NSFC ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; Shanghai Astronomical Observatory, Chinese Academy of Sciences ; Shanghai Astronomical Observatory, Chinese Academy of Sciences ; European Research Council (ERC) under the European Union ; European Research Council (ERC) under the European Union ; Program 'Rita Levi Montalcini' of the Italian MIUR ; Program 'Rita Levi Montalcini' of the Italian MIUR
源URL[http://ir.bao.ac.cn/handle/114a11/28051]  
专题中国科学院国家天文台
通讯作者Xu, Dandan; Zhu, Ling
作者单位1.Univ Florida, Dept Phys, 2001 Museum Rd, Gainesville, FL 32611 USA
2.Tsinghua Univ, Inst Adv Studies, Beijing 100084, Peoples R China
3.Tsinghua Univ, Tsinghua Ctr Astrophys, Beijing 100084, Peoples R China
4.Chinese Acad Sci, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China
5.Max Planck Inst Astrophys, Karl Schwarzschild Str 1, D-85748 Garching, Germany
6.Tsinghua Univ, Dept Astron, Beijing 100084, Peoples R China
7.Chinese Acad Sci, Natl Astron Observ, 20A Datun Rd, Beijing 100101, Peoples R China
8.Univ Vienna, Dept Astrophys, Turkenschanzstr 17, A-1180 Vienna, Austria
9.Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany
10.Flatiron Inst, Ctr Computat Astrophys, 162 Fifth Ave, New York, NY 10010 USA
推荐引用方式
GB/T 7714		 Xu, Dandan,Zhu, Ling,Grand, Robert,et al. A study of stellar orbit fractions: simulated IllustrisTNG galaxies compared to CALIFA observations[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2019,489(1):842-854.
APA Xu, Dandan.,Zhu, Ling.,Grand, Robert.,Springel, Volker.,Mao, Shude.,...&Hernquist, Lars.(2019).A study of stellar orbit fractions: simulated IllustrisTNG galaxies compared to CALIFA observations.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,489(1),842-854.
MLA Xu, Dandan,et al."A study of stellar orbit fractions: simulated IllustrisTNG galaxies compared to CALIFA observations".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 489.1(2019):842-854.

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