The specific frequency and the globular cluster formation efficiency in Milgromian dynamics
The specific frequency and the globular cluster formation efficiency in Milgromian dynamics
复制标题
米尔格罗米亚动力学中的特定频率和球状星团形成效率
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
P. Kroupa
中科院分区：
文献类型：
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作者：
Xufen Wu;P. Kroupa
以往对球状星团（GC）系统的研究表明，似乎存在一个普遍的特定GC形成效率，它将GC的总质量与宿主暗物质晕的维里质量Mvir联系起来（Georgiev et al. 2010; Spitler &福布斯2009）。本文导出了Milgromian动力学中比频率SN和比GC生成效率ε作为Mvir的函数，即修正牛顿动力学（Modified Newtonian Dynamics，MOND）在Milgromian动力学中，对于具有GC的星系，GC系统的质量MGC是Mvir的两分量函数，而不是简单的线性关系。一个在Milgromian宇宙中的观察者，如果将这个宇宙解释为牛顿/爱因斯坦宇宙，将错误地推断出GC系统的质量与重子星系的（假）暗物质晕之间的普适常数分数。与普适常数相比，在Milgromian宇宙中，对于Mvir为10 12 M的星系，随着Mvir的增加而减小，而对于Mvir > 10 12 M的大质量星系，随着Mvir的增加而增加。
Previous studies of globular cluster (GC) systems show that there appears to be a universal specific GC formation efficiencywhich relates the total mass of GCs to the virial mass of host dark matter halos, Mvir (Georgiev et al. 2010; Spitler & Forbes 2009). In this paper, the specific frequency, SN, and specific GC formation efficiency,�, are derived as functions of Mvir in Milgromian dynamics, i.e., in modified Newtonian dynamics (MOND). In Milgromian dynamics, for the galaxies with GCs, the mass of the GC system, MGC, is a two-component function of Mvir instead of a simple linear relation. An observer in a Milgromian universe, who interprets this universe as being Newtonian/Einsteinian, will incorrectly infer a universal constant fraction between the mass of the GC system and a (false) dark matter halo of the baryonic galaxy. In contrast to a universal constant of �, in a Milgromian universe, for galaxies with Mvir � 10 12 M⊙, � decreases with the increase of Mvir, while for massive galaxies with Mvir > 10 12 M⊙, � increases with the increase of Mvir.