Local Group的动力学模型
A Dynamical Model of the Local Group
摘要：
这个动力学模型的28个星系的距离小于1.5 Mpc，并没有明显的紧卫星，是由初始条件，在高红移的特殊速度很小，并按照标准宇宙学的增长。该解与大多数测量的红移、距离和自行都是令人满意的拟合，但有一些有趣的例外需要进一步研究。该模型预测银河系的旋转速度为256 km/s，与Reid et al.（2009 a）一致。十个本星系群的星系从超星系低纬度和超星系经度~ 70度处发出，可能是一个较大星系失败的组合的残余物。NGC 6822以红移约0.27经过银河系附近，其轨道类似于麦哲伦云。狮子座I的日心角速度为0.33质量/年，也许可以用平均恒星运动来测量，15个星系的自行大于0.05质量/年，可以用脉泽来测量。
英文摘要：
This dynamical model for the 28 galaxies with distances less than 1.5 Mpc, and not apparently tight satellites, is constrained by the initial condition that peculiar velocities at high redshift are small and growing in accordance with the standard cosmology. The solution is a satisfactory fit to most of the measured redshifts, distances, and proper motions, with some interesting exceptions that call for further investigation. The model predicts Milky Way rotation speed 256 km/s, consistent with Reid et al. (2009a). Ten Local Group galaxies emanate from low supergalactic latitude and supergalactic longitude ~ 70 degrees, perhaps as remnants from failed assembly of a larger galaxy. NGC 6822 passes close to the Milky Way at redshift ~0.27, in an orbit similar to the Magellanic Clouds. Leo I has heliocentric angular velocity 0.33 mas/yr, perhaps measurable by the mean stellar motion, and 15 galaxies have proper motions greater than 0.05 mas/yr, measurable for any with masers.
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。
