论文标题
跨越暗物质孤子核心：可能反向轨道进动
Crossing the dark matter soliton core: a possible reversed orbital precession
论文作者
论文摘要
如今，超光线（ULDM）模型已成为一种流行的暗物质情景。 ULDM颗粒的质量非常小，因此它们可以在中央暗物质光环区域表现出波性能。数值模拟表明，在ULDM光晕内形成具有几乎恒定质量密度的孤子芯。如果我们的银河系中心具有暗物质孤子核，那么一些绕着超大质量黑洞（SGR A*）绕的恒星将越过Soliton Core边界。在本文中，我们报告了第一个理论研究，介绍了Sgr a*附近的暗物质孤子核如何影响周围的恒星轨道进动。我们表明，某些特定的恒星轨道进动可能会沿方向逆行，这与一般相对性预测的前进方向相反。我们预计星星的未来轨道数据S2，S12和S4716可以为$ M \ sim 10^{ - 19} -19} -10^{ - 17} $ eV提供ULDM模型的关键测试。
The ultra-light dark matter (ULDM) model has become a popular dark matter scenario nowadays. The mass of the ULDM particles is extremely small so that they can exhibit wave properties in the central dark matter halo region. Numerical simulations show that a soliton core with an almost constant mass density would be formed inside the ULDM halo. If our Galactic Centre has a dark matter soliton core, some of the stars orbiting about the supermassive black hole (Sgr A*) would be crossing the soliton core boundary. In this article, we report the first theoretical study on how the dark matter soliton core near the Sgr A* could affect the surrounding stellar orbital precession. We show that some particular stellar orbital precession may become retrograde in direction, which is opposite to the prograde direction predicted by General Relativity. We anticipate that future orbital data of the stars S2, S12 and S4716 can provide crucial tests for the ULDM model for $m \sim 10^{-19}-10^{-17}$ eV.
