星系合并中压缩潮汐引发的星爆
Starburst triggered by compressive tides in galaxy mergers
摘要：
星系的潮汐场一般都是分裂性的。然而，在星系合并的情况下，潮汐波的压缩模式可能会发展并持续足够长的时间来形成星团。使用N体模拟的银河系，我们得出这些压缩区域的位置和统计的持续时间。潮汐的空间分布和观察到的年轻集群之间的协议被发现，而来自潮汐场的特征e-折叠时间为10至30万年比较好与团簇形成的时间尺度。
英文摘要：
The tidal field of galaxies is known generally to be disruptive. However, in the case of galaxy mergers, a compressive mode of tidal wave may develop and last long enough to cocoon the formation of star clusters. Using an N-body simulation of the Antennae galaxies, we derive the positions of these compressive regions and the statistics of their duration. Excellent agreement between the spatial distribution of tides and observed young clusters is found, while the characteristic e-folding times of 10 to 30 Myrs derived for the tidal field compare well with cluster formation time-scales.
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