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题名: Correlation Analysis between Spin, Velocity Shear, and Vorticity of Baryonic and Dark Matter Halos
作者: Liu Lili
刊名: Acta Astronomica Sinica
出版日期: 2016
卷号: 57, 期号:3, 页码:271-281
英文摘要: Using cosmological hydrodynamic simulations, we investigate the alignments between velocity shear, vorticity, and the spin of dark matter halos, and study the correlation between baryonic and dark matter. We find that (1) mis-alignment between vorticity of baryonic and dark matter would develop on scales < 0.2h~(-1) Mpc; (2) the vorticity of baryonic matter exhibits stronger alignment/anti-alignment with the eigenvectors of velocity shear than that of dark matter; (3) small/massive halos spinning parallel/perpendicular to the host filaments are sensitive to the identification of cosmic web, simulation box size, and resolution. These factors might complicate the connection between the spins of dark matter halos and galaxies, and affect the correlation signal of the alignments of galaxy spin with nearby large-scale structures.
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/16857
Appears in Collections:南极天文中心_期刊论文

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