论文标题
用S2星来缩小允许的超轻玻色子范围
Narrowing the allowed mass range of ultralight bosons with the S2 star
论文作者
论文摘要
众所周知，超轻玻色子的N体模拟显示了光环最终部分的孤子暗物质核心的形成。这种孤子的尺度长度取决于玻色子质量的倒数。另一方面，银河中心中恒星的轨道运动取决于物质的分布，无论是男性还是黑暗，为该地区的重力场提供了出色的探针。在这封信中，我们提出了银河中心中的S-Star作为一种新的观察工具，与其他天体物理系统互补，以缩小超轻暗物质候选玻色子质量的允许值范围。我们构建了模拟目录，以反映S2的即将到来的天体和光谱观察结果，我们使用MCMC分析来预测可能会界定超轻玻色子的质量的准确性，并且我们表明，一旦考虑了互补的约束，该分析将有助于限制Boson允许的Boson量范围。我们的分析预测，在置信度的95％的95％，对超轻质玻色子的质量限制为$ <10^{ - 19} $ eV。
It is well known that N-body simulations of ultralight bosons show the formation of a solitonic dark matter core in the innermost part of the halo. The scale length of such a soliton depends on the inverse of the mass of the boson. On the other hand, the orbital motion of stars in the Galactic Center depends on the distribution of matter whether be it baryonic or dark, providing an excellent probe for the gravitational field of the region. In this Letter we propose the S-stars in the Galactic Center as a new observational tool, complementary to other astrophysical systems, to narrow down the range of allowed values for an ultralight dark matter candidate boson mass. We built mock catalogs mirroring the forthcoming astrometric and spectroscopic observations of S2, and we used a MCMC analysis to predict the accuracy down to which the mass of an ultralight boson may be bounded, and we showed that, once complementary constraints are considered, this analysis will help to restrict the allowed range of the boson mass. Our analysis forecasts the bound on the mass of an ultralight boson to be $< 10^{-19}$ eV at the 95% of confidence level.
