论文标题
部分可观测时空混沌系统的无模型预测
Investigating the nature of mass distribution surrounding the Galactic supermassive black hole
论文作者
论文摘要
在过去的三十年中，确定了银河中心（SGR A*）的许多恒星。它们的轨道性质可以为SMBH的质量带来严格的限制。特别是，自我们首次发现其位置以来，STAR S2至少完成了一个时期，该时期可以提供丰富的信息来检查SMBH的特性以及SMBH周围的天体物理环境。在这里，我们报告了一个有趣的现象，即如果大量的暗物质或恒星质量分布在SMBH周围，则假设最佳的暗物质风景，S2恒星轨道的进动速度最多可以“减慢”最多27％，而没有SMBH的暗物质。我们预计S2恒星轨道或其他恒星轨道的未来高质量观察数据可以帮助揭示SMBH附近的实际质量分布和暗物质的性质。
In the past three decades, many stars orbiting about the supermassive black hole (SMBH) at the Galactic Centre (Sgr A*) were identified. Their orbital nature can give stringent constraints for the mass of the SMBH. In particular, the star S2 has completed at least one period since our first detection of its position, which can provide rich information to examine the properties of the SMBH, and the astrophysical environment surrounding the SMBH. Here, we report an interesting phenomenon that if a significant amount of dark matter or stellar mass is distributed around the SMBH, the precession speed of the S2 stellar orbit could be `slow down' by at most 27\% compared with that without dark matter surrounding the SMBH, assuming the optimal dark matter scenario. We anticipate that future high quality observational data of the S2 stellar orbit or other stellar orbits can help reveal the actual mass distribution near the SMBH and the nature of dark matter.
