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Hot and counter-rotating star-forming disc galaxies in IllustrisTNG and their real-world counterparts
Lu, Shengdong1; Xu, Dandan1; Wang, Yunchong2; Chen, Yanmei3; Zhu, Ling4; Mao, Shude1; Springel, Volker5; Wang, Jing6; Vogelsberger, Mark7; Hernquist, Lars8
2021-05-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume503Issue:1Pages:726-742
AbstractA key feature of a large population of low-mass, late-type disc galaxies are star-forming discs with exponential light distributions. They are typically also associated with thin and flat morphologies, blue colours, and dynamically cold stars moving along circular orbits within co-planar thin gas discs. However, the latter features do not necessarily always imply the former, in fact, a variety of different kinematic configurations do exist. In this work, we use the cosmological hydrodynamical IllustrisTNG simulation to study the nature and origin of dynamically hot, sometimes even counter-rotating, star-forming disc galaxies in the lower stellar mass range (between 5 x 10(9) M-circle dot and 2 x 10(10) M-circle dot). We find that being dynamically hot arises in most cases as an induced transient state, for example due to galaxy interactions and merger activities, rather than as an age-dependent evolutionary phase of star-forming disc galaxies. The dynamically hot but still actively star-forming discs show a common feature of hosting kinematically misaligned gas and stellar discs, and centrally concentrated on-going star formation. The former is often accompanied by disturbed gas morphologies, while the latter is reflected in low gas and stellar spins in comparison to their dynamically cold, normal disc counterparts. Interestingly, observed galaxies from MaNGA with kinematic misalignment between gas and stars show remarkably similar general properties as the IllustrisTNG galaxies, and therefore are plausible real-world counterparts. In turn, this allows us to make predictions for the stellar orbits and gas properties of these misaligned galaxies.
Keywordmethods: numerical galaxy: evolution galaxies: formation galaxy: kinematics and dynamics
Funding OrganizationNational Key Research and Development Program of China ; National Key Research and Development Program of China ; National Science Foundation of China ; National Science Foundation of China ; German Science Foundation, DFG ; German Science Foundation, DFG ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Science Foundation of China ; National Science Foundation of China ; German Science Foundation, DFG ; German Science Foundation, DFG ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Science Foundation of China ; National Science Foundation of China ; German Science Foundation, DFG ; German Science Foundation, DFG ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Science Foundation of China ; National Science Foundation of China ; German Science Foundation, DFG ; German Science Foundation, DFG
DOI10.1093/mnras/stab497
WOS KeywordDIGITAL SKY SURVEY ; ANGULAR-MOMENTUM ; GAS ; ORIGIN ; SIMULATION ; LIBRARY
Language英语
Funding ProjectNational Key Research and Development Program of China[2018YFA0404501] ; National Science Foundation of China[11821303] ; National Science Foundation of China[11761131004] ; National Science Foundation of China[11761141012] ; National Science Foundation of China[11991052] ; German Science Foundation, DFG[653578]
Funding OrganizationNational Key Research and Development Program of China ; National Key Research and Development Program of China ; National Science Foundation of China ; National Science Foundation of China ; German Science Foundation, DFG ; German Science Foundation, DFG ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Science Foundation of China ; National Science Foundation of China ; German Science Foundation, DFG ; German Science Foundation, DFG ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Science Foundation of China ; National Science Foundation of China ; German Science Foundation, DFG ; German Science Foundation, DFG ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Science Foundation of China ; National Science Foundation of China ; German Science Foundation, DFG ; German Science Foundation, DFG
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000641987400054
PublisherOXFORD UNIV PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/78042
Collection中国科学院国家天文台
Corresponding AuthorLu, Shengdong; Xu, Dandan
Affiliation1.Tsinghua Univ, Dept Astron, Beijing 100084, Peoples R China
2.Stanford Univ, Kavli Inst Particle Astrophys & Cosmol, Phys Dept, Stanford, CA 94305 USA
3.Nanjing Univ, Dept Astron, Nanjing 210023, 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.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China
7.MIT, Dept Phys, Kavli Inst Astrophys & Space Res, Cambridge, MA 02139 USA
8.Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA
Recommended Citation
GB/T 7714
Lu, Shengdong,Xu, Dandan,Wang, Yunchong,et al. Hot and counter-rotating star-forming disc galaxies in IllustrisTNG and their real-world counterparts[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2021,503(1):726-742.
APA Lu, Shengdong.,Xu, Dandan.,Wang, Yunchong.,Chen, Yanmei.,Zhu, Ling.,...&Hernquist, Lars.(2021).Hot and counter-rotating star-forming disc galaxies in IllustrisTNG and their real-world counterparts.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,503(1),726-742.
MLA Lu, Shengdong,et al."Hot and counter-rotating star-forming disc galaxies in IllustrisTNG and their real-world counterparts".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 503.1(2021):726-742.
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