arXiv 1307.65632013-07-24astro-ph.GAastro-ph.CO

Milgromian动力学中的比频率和球状星团形成效率

The specific frequency and the globular cluster formation efficiency in Milgromian dynamics

Xufen Wu, Pavel Kroupa

备注：: 5 pages, 3 figures, MNRAS accepted
DOI：: 10.1093/mnras/stt1393

摘要：

先前对球状星团（GC）系统的研究表明，似乎存在一个通用的特定GC形成效率$η$，它将GC的总质量与宿主暗物质晕的维里质量$M_{vir}$联系起来（Georgiev et al 2010，Spitler & Forbes 2009）。本文导出了Milgromian动力学中比频率$S_N$和比GC生成效率$η$作为$M_{vir}$的函数，即：修正牛顿动力学（Modified Newtonian Dynamics，MOND）在Milgromian动力学中，对于GC星系，GC系统的质量$M_{GC}$是$M_{vir}$的二分量函数，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，就会错误地推断出GC系统的质量与重子星系的（假）暗物质晕之间存在一个普适常数。与普适常数$η$相反，在Milgromian宇宙中，对于具有$M_{vir} <= 10^{12}\msun$的星系，$η$随$M_{vir}$的增大而减小，而对于具有$M_{vir}>10^{12}\msun$的大质量星系，$η$随$M_{vir}$的增大而增大.

英文摘要：

Previous studies of globular cluster (GC) systems show that there appears to be a universal specific GC formation efficiency $η$ which relates the total mass of GCs to the virial mass of host dark matter halos, $M_{vir}$ (Georgiev et al 2010, Spitler & Forbes2009). In this paper, the specific frequency, $S_N$, and specific GC formation efficiency, $η$, are derived as functions of $M_{vir}$ in Milgromian dynamics, i.e., in modified Newtonian dynamics (MOND). In Milgromian dynamics, for the galaxies with GCs, the mass of the GC system, $M_{GC}$, is a two-component function of $M_{vir}$ 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 $η$, in a Milgromian universe, for galaxies with $M_{vir} <= 10^{12}\msun$, $η$ decreases with the increase of $M_{vir}$, while for massive galaxies with $M_{vir}>10^{12}\msun$, $η$ increases with the increase of $M_{vir}$.

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。

摘要：

英文摘要：

相关论文