论文标题
超新星残留物中毫磨碎的暗物质的动态
Dynamics of millicharged dark matter in supernova remnants
论文作者
论文摘要
如果电荷与质量的比率远低于电子或质子，则暗物质可能具有较小的电磁电荷。这个候选人通常称为Millicharged暗物质（MDM），将形成血浆，并与星系中的星际培养基和电磁场相互作用。通常，了解MDM的动态需要考虑集体等离子体效应。已经提出，可以在超新星残留物中加速MDM，形成一个黑暗的宇宙射线种群，该射线种群将留下明显的实验特征。在这项工作中，我们研究了一个微物理模型，其中MDM被超新星残留物震惊，并在膨胀的流体框架中溶出。我们发现$ |q_χ/m_χ| \ gtrsim 10^{ - 13} e / {\ rm mev} $，电磁等离子体不稳定性的各向同性长度比超新星残留物的大小短得多。这是形成Fermi-Accelerated MDM组件的第一步，尽管不够，但确定该组件的大小需要进一步研究。我们讨论超新星残留物中MDM相互作用的其他含义。
Dark matter could have a small electromagnetic charge, provided the charge-to-mass ratio is much less than that of electrons or protons. This candidate, commonly known as millicharged dark matter (mDM), would form a plasma and interact with the interstellar medium and electromagnetic fields within galaxies. In general, understanding the dynamics of mDM requires consideration of collective plasma effects. It has been proposed that mDM can be accelerated in supernova remnants, forming a dark cosmic ray population that would leave distinct experimental signatures. In this work, we study a microphysical model where mDM is shocked by a supernova remnant and isotropized in the frame of the expanding fluid. We find that for $|q_χ/m_χ| \gtrsim 10^{-13} e / {\rm MeV}$, the isotropization length for electromagnetic plasma instabilities is much shorter than the size of the supernova remnant. This is a necessary, though not sufficient, first step for formation of a Fermi-accelerated mDM component, and determining the size of this component requires further study. We discuss additional implications of mDM interactions in supernova remnants.
