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Formation of massive disc galaxies in the IllustrisTNG simulation
Zeng, Guangquan1,2; Wang, Lan1; Gao, Liang1,2,3
2021-11-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume507Issue:3Pages:3301-3311
AbstractWe investigate the formation history of massive disc galaxies in hydrodynamical simulation - the IllustrisTNG, to study why massive disc galaxies survive through cosmic time. 83 galaxies in the simulation are selected with M-*,M-z = 0 > 8 x 10(10) M-circle dot and kinematic bulge-to-total ratio less than 0.3. We find that 8.4 per cent of these massive disc galaxies have quiet merger histories and preserve disc morphology since formed. 54.2 per cent have a significant increase in bulge components in history, then become discs again till present time. The rest 37.3 per cent experience prominent mergers but survive to remain discy. While mergers and even major mergers do not always turn disc galaxies into ellipticals, we study the relations between various properties of mergers and the morphology of merger remnants. We find a strong dependence of remnant morphology on the orbit type of major mergers. Specifically, major mergers with a spiral-in falling orbit mostly lead to disc-dominant remnants, and major mergers of head-on galaxy-galaxy collision mostly form ellipticals. This dependence of remnant morphology on orbit type is much stronger than the dependence on cold gas fraction or orbital configuration of merger system as previously studied.
Keywordgalaxies: disc galaxies: evolution galaxies: formation
Funding OrganizationNational Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Key Program for Science and Technology Research Development of China ; National Key Program for Science and Technology Research Development of China ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Key Program for Science and Technology Research Development of China ; National Key Program for Science and Technology Research Development of China ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Key Program for Science and Technology Research Development of China ; National Key Program for Science and Technology Research Development of China ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Key Program for Science and Technology Research Development of China ; National Key Program for Science and Technology Research Development of China
DOI10.1093/mnras/stab2294
WOS KeywordSTAR-FORMATION ; MERGER REMNANTS ; EQUAL-MASS ; EVOLUTION ; MORPHOLOGY ; ROTATION ; PROJECT ; ORIGIN ; MATTER
Language英语
Funding ProjectNational Natural Science Foundation of China (NSFC)[11988101] ; National Key Program for Science and Technology Research Development of China[2018YFE0202902]
Funding OrganizationNational Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Key Program for Science and Technology Research Development of China ; National Key Program for Science and Technology Research Development of China ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Key Program for Science and Technology Research Development of China ; National Key Program for Science and Technology Research Development of China ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Key Program for Science and Technology Research Development of China ; National Key Program for Science and Technology Research Development of China ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Key Program for Science and Technology Research Development of China ; National Key Program for Science and Technology Research Development of China
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000708848000010
PublisherOXFORD UNIV PRESS
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Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/74878
Collection中国科学院国家天文台
Corresponding AuthorZeng, Guangquan; Wang, Lan
Affiliation1.Chinese Acad Sci, Natl Astron Observ, Key Lab Computat Astrophys, Beijing 100101, Peoples R China
2.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China
3.Univ Durham, Inst Computat Cosmol, Dept Phys, South Rd, Durham DH1 3LE, England
Recommended Citation
GB/T 7714
Zeng, Guangquan,Wang, Lan,Gao, Liang. Formation of massive disc galaxies in the IllustrisTNG simulation[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2021,507(3):3301-3311.
APA Zeng, Guangquan,Wang, Lan,&Gao, Liang.(2021).Formation of massive disc galaxies in the IllustrisTNG simulation.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,507(3),3301-3311.
MLA Zeng, Guangquan,et al."Formation of massive disc galaxies in the IllustrisTNG simulation".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 507.3(2021):3301-3311.
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