SPIN ALIGNMENTS OF SPIRAL GALAXIES WITHIN THE LARGE-SCALE STRUCTURE FROM SDSS DR7

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	SPIN ALIGNMENTS OF SPIRAL GALAXIES WITHIN THE LARGE-SCALE STRUCTURE FROM SDSS DR7
	Wang, L; Wang, L
刊名	ASTROPHYSICAL JOURNAL
	2015
卷号	798 期号:1 页码:17
英文摘要	Using a sample of spiral galaxies selected from the Sloan Digital Sky Survey Data Release 7 and Galaxy Zoo 2, we investigate the alignment of spin axes of spiral galaxies with their surrounding large-scale structure, which is characterized by the large-scale tidal field reconstructed from the data using galaxy groups above a certain mass threshold. We find that the spin axes only have weak tendencies to be aligned with (or perpendicular to) the intermediate (or minor) axis of the local tidal tensor. The signal is the strongest in a cluster environment where all three eigenvalues of the local tidal tensor are positive. Compared to the alignments between halo spins and the local tidal field obtained in N-body simulations, the above observational results are in best agreement with those for the spins of inner regions of halos, suggesting that the disk material traces the angular momentum of dark matter halos in the inner regions.
学科主题	天文和天体物理
收录类别	SCI
语种	英语
WOS记录号	WOS:000347245100017
公开日期	2015-12-24
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/14857]
专题	紫金山天文台_宇宙伽马暴、中子星及相关物理研究团组
推荐引用方式 GB/T 7714	Wang, L,Wang, L. SPIN ALIGNMENTS OF SPIRAL GALAXIES WITHIN THE LARGE-SCALE STRUCTURE FROM SDSS DR7[J]. ASTROPHYSICAL JOURNAL,2015,798(1):17.
APA	Wang, L,&Wang, L.(2015).SPIN ALIGNMENTS OF SPIRAL GALAXIES WITHIN THE LARGE-SCALE STRUCTURE FROM SDSS DR7.ASTROPHYSICAL JOURNAL,798(1),17.
MLA	Wang, L,et al."SPIN ALIGNMENTS OF SPIRAL GALAXIES WITHIN THE LARGE-SCALE STRUCTURE FROM SDSS DR7".ASTROPHYSICAL JOURNAL 798.1(2015):17.