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arXiv 1012.1160astro-ph.GA
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棒旋星系中的扩散

Diffusion in barred-spiral galaxies

Maura Brunetti, Cristina Chiappini, Daniel Pfenniger

摘要:

通过计算具有边缘稳定Toomre-Q参数的膨胀盘N体自洽系统的扩散系数和扩散时标,刻画了恒星在盘平面内的径向迁移.我们发现,扩散是不恒定的时间,但以下的酒吧的演变,并成为最大的共转区域附近和外部磁盘区域,在那里发展的不对称模式。

英文摘要:

We characterize the radial migration of stars in the disk plane by calculating the diffusion coefficient and the diffusion time-scale for a bulge-disk N-body self-consistent system with a marginally-stable Toomre-Q parameter. We find that diffusion is not constant in time, but follows the evolution of the bar, and becomes maximum near the corotation region and in the external disk region, where asymmetric patterns develop.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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