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The Spin Alignment of Galaxies with the Large-scale Tidal Field in Hydrodynamic Simulations
Wang, Peng1,2; Guo, Quan3; Kang, Xi1; Libeskind, Noam, I4
刊名ASTROPHYSICAL JOURNAL
2018-10-20
卷号866期号:2页码:6
关键词galaxies: evolution galaxies: general large-scale structure of universe methods: observational methods: statistical
ISSN号0004-637X
DOI10.3847/1538-4357/aae20f
英文摘要

The correlation between the spins of dark matter halos and the large-scale structure (LSS) has been studied in great detail over a large redshift range, while investigations of galaxies are still incomplete. Motivated by this point, we use the state-of-the-art hydrodynamic simulation, Illustris-1, to investigate mainly the spin-LSS correlation of galaxies at a redshift of z = 0. We mainly find that the spins of low-mass, blue, oblate galaxies are preferentially aligned with the slowest collapsing direction (e(3)) of the large-scale tidal field, while massive, red, prolate galaxy spins tend to be perpendicular to e(3). The transition from a parallel to a perpendicular trend occurs at similar to 10(9.4) h(-1) M-circle dot in the stellar mass, similar to 0.62 in the g-r color, and similar to 0.4 in triaxiality. The transition stellar mass decreases with increasing redshifts. The alignment was found to be primarily correlated with the galaxy stellar mass. Our results are consistent with previous studies both in N-body simulations and observations. Our study also fills the vacancy in the study of the galaxy spin-LSS correlation at z = 0 using hydrodynamical simulations and also provides important insight to understand the formation and evolution of galaxy angular momentum.

WOS关键词DARK-MATTER HALOES ; COSMIC WEB ; ANGULAR-MOMENTUM ; FILAMENTS ; ORIENTATION ; EVOLUTION ; UNIVERSE ; ORIGIN
WOS研究方向Astronomy & Astrophysics
语种英语
出版者IOP PUBLISHING LTD
WOS记录号WOS:000448201700003
内容类型期刊论文
源URL[http://libir.pmo.ac.cn/handle/332002/21220]  
专题中国科学院紫金山天文台
通讯作者Wang, Peng
作者单位1.PMO, 8 Yuan Hua Rd, Nanjing 210034, Jiangsu, Peoples R China
2.Univ Chinese Acad Sci, Grad Sch, 19A,Yuquan Rd, Beijing 100049, Peoples R China
3.Shanghai Astron Observ SHAO, Nandan Rd 80, Shanghai 20030, Peoples R China
4.Leibniz Inst Astrophys Potsdam AIP, Sternwarte 16, D-14482 Potsdam, Germany
推荐引用方式
GB/T 7714
Wang, Peng,Guo, Quan,Kang, Xi,et al. The Spin Alignment of Galaxies with the Large-scale Tidal Field in Hydrodynamic Simulations[J]. ASTROPHYSICAL JOURNAL,2018,866(2):6.
APA Wang, Peng,Guo, Quan,Kang, Xi,&Libeskind, Noam, I.(2018).The Spin Alignment of Galaxies with the Large-scale Tidal Field in Hydrodynamic Simulations.ASTROPHYSICAL JOURNAL,866(2),6.
MLA Wang, Peng,et al."The Spin Alignment of Galaxies with the Large-scale Tidal Field in Hydrodynamic Simulations".ASTROPHYSICAL JOURNAL 866.2(2018):6.
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