论文标题
星系中没有通用加速度量表
There is no universal acceleration scale in galaxies
论文作者
论文摘要
最近，许多研究似乎揭示了暗物质与重物物质之间的某些相关性。特别是，在旋转星系中发现的意外紧密的径向加速关系（RAR）引起了很多关注。 RAR表明星系中存在通用和基本的加速度量表，这似乎挑战了$λ$ CDM模型，并有利于一些修改的重力理论。关于RAR是否与$λ$ CDM型号兼容的大规模辩论。在这里，通过分析SDSS-IV漫画样本中13 e0型椭圆星系的高质量分散曲线，并假设每个星系中3维速度分散的半径$ r $的幂律功能晚期星系。这种新的RAR提供了一个独立的探测，以伪造星系中任何通用加速度量表的存在。我们的结果极大地挑战了那些改进的重力理论，这些理论表明存在任何通用加速度量表。
Recently, many studies seem to reveal the existence of some correlations between dark matter and baryonic matter. In particular, the unexpected tight Radial Acceleration Relation (RAR) discovered in rotating galaxies has caught much attention. The RAR suggests the existence of a universal and fundamental acceleration scale in galaxies, which seems to challenge the $Λ$CDM model and favour some modified gravity theories. A large debate about whether RAR is compatible with the $Λ$CDM model has arisen. Here, by analysing the high quality velocity dispersion profiles of 13 E0-type elliptical galaxies in the SDSS-IV MaNGA sample and assuming a power-law function of radius $r$ for the 3-dimensional velocity dispersion in each galaxy, we report the RAR for E0-type elliptical galaxies and we show that the resultant RAR has more than $5σ$ deviations from the RAR in late-type galaxies. This new RAR provides an independent probe to falsify the existence of any universal acceleration scale in galaxies. Our result significantly challenges those modified gravity theories which suggest the existence of any universal acceleration scale.
