标题： 吞噬的 Fundamental-Plane 椭圆的命运 显示英文标题

标题： The fate of cannibalized fundamental-plane ellipticals

摘要： 演化和更大团簇星系引力场中运行的星系的瓦解由三种耦合机制驱动：1）由于次级星系在主星系中的时变运动引起的加热；2）由于潮汐应变场导致的质量损失；以及3）轨道衰减。 先前的研究表明，潮汐加热在冲量近似极限内仍然有效。 不仅总体能量超过了之前的预测值，而且这些能量是在次级星系内部深处获得的，例如，在大多数情况下，是在半质量半径以内。 这里，这些概念被应用于椭圆星系的吞噬，这些星系具有根本平面参数。 总之，通过动力学摩擦能够落入团簇巨型星系中心的卫星，在到达中心之前已经被内部加热蒸发。 这表明真正由合并产生的多重核巨型星系应该是罕见的。 具体而言，质量比小至1%的次级星系，在任何初始轨道上都会蒸发，而质量比小至0.1%的偏心轨道上的次级星系会显著演化并几乎完全蒸发，达到星系年龄的时间尺度。 被捕获的卫星，其质量比小于约1%，没有足够时间衰减到中心。 经过多次吸积事件后，模型预测合并后的系统与原始主星系具有相似的分布特征，并且浓度略有增加。 显示英文摘要

摘要： Evolution and disruption of galaxies orbiting in the gravitational field of a larger cluster galaxy are driven by three coupled mechanisms: 1) the heating due to its time dependent motion in the primary; 2) mass loss due to the tidal strain field; and 3) orbital decay. Previous work demonstrated that tidal heating is effective well inside the impulse approximation limit. Not only does the overall energy increase over previous predictions, but the work is done deep inside the secondary galaxy, e.g. at or inside the half mass radius in most cases. Here, these ideas applied to cannibalization of elliptical galaxies with fundamental-plane parameters. In summary, satellites which can fall to the center of a cluster giant by dynamical friction are evaporated by internal heating by the time they reach the center. This suggests that true merger-produced multiple nuclei giants should be rare. Specifically, secondaries with mass ratios as small as 1\% on any initial orbit evaporate and those on eccentric orbits with mass ratios as small as 0.1\% evolve significantly and nearly evaporate in a galaxian age. Captured satellites with mass ratios smaller than roughly 1\% have insufficient time to decay to the center. After many accretion events, the model predicts that the merged system has a profile similar to that of the original primary with a weak increase in concentration.