论文标题
与核相互作用的玻色子恒星上的扩散X射线和伽马射线限制
Diffuse X-Ray and Gamma-Ray Limits on Boson Stars that Interact with Nuclei
论文作者
论文摘要
轻骨暗物质可以形成重力结合的状态，称为玻色子恒星。在这项工作中，我们探讨了与星际介质（ISM）相互作用的这些对象的新签名。我们展示了玻色粒暗物质和核子之间的有效耦合如何导致ISM Baryons在传输玻色子恒星时加速的潜力，从而使ISM以较高的速率和能量在辐射中。但是，低ISM密度意味着大多数银河玻色子恒星将太微弱，无法通过这种效果观察到。相比之下，由硬X射线和软伽马射线中的弥漫性光子通量与玻色子星星与离子化ISM相相互作用的散射光子通量可能是相当的。我们计算此扩散的通量，并将其与从Heao-1，Integrant和comptel到这些对象分数的地下限制的现有观测值进行比较。这种新颖的方法对玻孔星的暗物质施加了约束，同时避免了玻色子星形配置的环境重子的反作用效应，这与陆地搜索不同，在该搜索中，人们注意到反作用可以筛选光波体磁场。此外，这项研究可以扩展到由轻暗物质形成的其他耦合和结构。对于暗物质质量$（10^{ - 14} $，$ 10^{ - 8}）\ {\ rm ev} $和玻色片星质量$（10^{ - 10} $，$ 10^{ - 1} { - 1}）\ m _ {\ odot} $，我们在$ f _ $ f _ $ f _;在直接耦合到标准模型的玻色子恒星中。
Light bosonic dark matter can form gravitationally bound states known as boson stars. In this work, we explore a new signature of these objects interacting with the interstellar medium (ISM). We show how small effective couplings between the bosonic dark matter and the nucleon lead to a potential that accelerates ISM baryons as they transit the boson star, making the ISM within radiate at a high rate and energy. The low ISM density, however, implies the majority of Galactic boson stars will be too faint to be observable through this effect. By contrast, the diffuse photon flux, in hard x-rays and soft gamma-rays, produced by boson stars interacting with the ionized ISM phases can be sizable. We compute this diffuse flux and compare it to existing observations from HEAO-1, INTEGRAL and COMPTEL to infer limits on the fraction of these objects. This novel method places constraints on boson star dark matter while avoiding back-action effects from ambient baryons on the boson star configuration, unlike terrestrial searches where it has been noted that back-action can screen light bosonic fields. In addition, this study could be extended to other couplings and structures formed from light dark matter. For dark matter masses $(10^{-14}$, $10^{-8}) \ {\rm eV}$ and boson star masses $(10^{-10}$, $10^{-1}) \ M_{\odot}$, we find the constraints on the fraction can go down to $f_* \lesssim 10^{-9}$ for dark matter in boson stars that is directly coupled to the Standard Model.
