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The stellar orbit distribution in present-day galaxies inferred from the CALIFA survey

文献类型：期刊论文

作者Zhu, Ling1; van de Ven, Glenn1,2; van den Bosch, Remco1; Rix, Hans-Walter1; Lyubenova, Mariya2,3; Falcon-Barroso, Jesus4,5; Martig, Marie1,6; Mao, Shude7,8,9,10; Xu, Dandan11; Jin, Yunpeng9
刊名NATURE ASTRONOMY
出版日期2018-03-01
卷号2期号:3页码:233-238
ISSN号2397-3366
DOI10.1038/s41550-017-0348-1
英文摘要Galaxy formation entails the hierarchical assembly of mass, along with the condensation of baryons and the ensuing, self-regulating star formation(1,2). The stars form a collisionless system whose orbit distribution retains dynamical memory that can constrain a galaxy's formation history(3). The orbits dominated by ordered rotation, with near-maximum circularity lambda(z) approximate to 1, are called kinematically cold, and the orbits dominated by random motion, with low circularity lambda(z) approximate to 0, are kinematically hot. The fraction of stars on 'cold' orbits, compared with the fraction on 'hot' orbits, speaks directly to the quiescence or violence of the galaxies' formation histories(4,5). Here we present such orbit distributions, derived from stellar kinematic maps through orbit-based modelling for a well-defined, large sample of 300 nearby galaxies. The sample, drawn from the CALIFA survey(6), includes the main morphological galaxy types and spans a total stellar mass range from 10(8.7) to 10(11.9) solar masses. Our analysis derives the orbit-circularity distribution as a function of galaxy mass and its volume-averaged total distribution. We find that across most of the considered mass range and across morphological types, there are more stars on 'warm' orbits defined as 0.25 <= lambda(z) <= 0.8 than on either 'cold' or 'hot' orbits. This orbit-based 'Hubble diagram' provides a benchmark for galaxy formation simulations in a cosmological context.
WOS关键词ANGULAR-MOMENTUM ; COSMIC TIME ; PROJECT ; EVOLUTION ; MODELS ; ENVIRONMENTS ; SIMULATIONS ; KINEMATICS ; ANISOTROPY ; FEEDBACK
资助项目DAGAL network from the People Programme (Marie Curie Actions) of the European Unions Seventh Framework Programme under REA[PITN-GA-2011-289313] ; German Research Foundation[Sonderforschungsbereich SFB 881] ; European Research Council under the European Union[724857] ; National Science Foundation of China[11333003] ; National Science Foundation of China[11390372] ; Deutsche Forschungsgemeinschaft (German Research Foundation)[MO 2979/1-1] ; Spanish Ministry of Economy and Competitiveness[AYA2016-77237-C3-1-P] ; DFG Research Centre[SFB-881]
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:000429087000020
出版者NATURE PUBLISHING GROUP
资助机构DAGAL network from the People Programme (Marie Curie Actions) of the European Unions Seventh Framework Programme under REA ; DAGAL network from the People Programme (Marie Curie Actions) of the European Unions Seventh Framework Programme under REA ; German Research Foundation ; German Research Foundation ; European Research Council under the European Union ; European Research Council under the European Union ; National Science Foundation of China ; National Science Foundation of China ; Deutsche Forschungsgemeinschaft (German Research Foundation) ; Deutsche Forschungsgemeinschaft (German Research Foundation) ; Spanish Ministry of Economy and Competitiveness ; Spanish Ministry of Economy and Competitiveness ; DFG Research Centre ; DFG Research Centre ; DAGAL network from the People Programme (Marie Curie Actions) of the European Unions Seventh Framework Programme under REA ; DAGAL network from the People Programme (Marie Curie Actions) of the European Unions Seventh Framework Programme under REA ; German Research Foundation ; German Research Foundation ; European Research Council under the European Union ; European Research Council under the European Union ; National Science Foundation of China ; National Science Foundation of China ; Deutsche Forschungsgemeinschaft (German Research Foundation) ; Deutsche Forschungsgemeinschaft (German Research Foundation) ; Spanish Ministry of Economy and Competitiveness ; Spanish Ministry of Economy and Competitiveness ; DFG Research Centre ; DFG Research Centre ; DAGAL network from the People Programme (Marie Curie Actions) of the European Unions Seventh Framework Programme under REA ; DAGAL network from the People Programme (Marie Curie Actions) of the European Unions Seventh Framework Programme under REA ; German Research Foundation ; German Research Foundation ; European Research Council under the European Union ; European Research Council under the European Union ; National Science Foundation of China ; National Science Foundation of China ; Deutsche Forschungsgemeinschaft (German Research Foundation) ; Deutsche Forschungsgemeinschaft (German Research Foundation) ; Spanish Ministry of Economy and Competitiveness ; Spanish Ministry of Economy and Competitiveness ; DFG Research Centre ; DFG Research Centre ; DAGAL network from the People Programme (Marie Curie Actions) of the European Unions Seventh Framework Programme under REA ; DAGAL network from the People Programme (Marie Curie Actions) of the European Unions Seventh Framework Programme under REA ; German Research Foundation ; German Research Foundation ; European Research Council under the European Union ; European Research Council under the European Union ; National Science Foundation of China ; National Science Foundation of China ; Deutsche Forschungsgemeinschaft (German Research Foundation) ; Deutsche Forschungsgemeinschaft (German Research Foundation) ; Spanish Ministry of Economy and Competitiveness ; Spanish Ministry of Economy and Competitiveness ; DFG Research Centre ; DFG Research Centre
源URL[http://ir.bao.ac.cn/handle/114a11/37139]  
专题中国科学院国家天文台
通讯作者Zhu, Ling
作者单位1.Max Planck Inst Astron, Heidelberg, Germany
2.European Southern Observ, Munich, Germany
3.Univ Groningen, Kapteyn Astron Inst, Groningen, Netherlands
4.IAC, Tenerife, Spain
5.Univ La Laguna, Dept Astrofis, Tenerife, Spain
6.Liverpool John Moores Univ, Astrophys Res Inst, Liverpool, Merseyside, England
7.Tsinghua Univ, Phys Dept, Beijing, Peoples R China
8.Tsinghua Univ, Tsinghua Ctr Astrophys, Beijing, Peoples R China
9.Chinese Acad Sci, Natl Astron Observ, Beijing, Peoples R China
10.Univ Manchester, Jodrell Bank Ctr Astrophys, Manchester, Lancs, England
推荐引用方式
GB/T 7714		 Zhu, Ling,van de Ven, Glenn,van den Bosch, Remco,et al. The stellar orbit distribution in present-day galaxies inferred from the CALIFA survey[J]. NATURE ASTRONOMY,2018,2(3):233-238.
APA Zhu, Ling.,van de Ven, Glenn.,van den Bosch, Remco.,Rix, Hans-Walter.,Lyubenova, Mariya.,...&Sanchez, Sebastian F..(2018).The stellar orbit distribution in present-day galaxies inferred from the CALIFA survey.NATURE ASTRONOMY,2(3),233-238.
MLA Zhu, Ling,et al."The stellar orbit distribution in present-day galaxies inferred from the CALIFA survey".NATURE ASTRONOMY 2.3(2018):233-238.

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来源：国家天文台

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