论文标题
从伽玛射线到无线电波：跨频谱的暗物质搜索
From gamma rays to radio waves: Dark Matter searches across the spectrum
论文作者
论文摘要
在这篇论文中，我们研究了在间接暗物质检测的背景下，多门徒天文学提供的可能性。我们通过研究在宇宙不同尺度（银河系，外层状，宇宙的，宇宙网络丝）上生产的电磁光谱（伽马射线，X射线，无线电波）的不同信号来应用多波长策略。 在第一部分中，我们获得了在暗物质晕圈中氢原子发出的21cm线之间的第一个预测，对乳突外伽玛射线通量和21cm线之间的互相关信号的第一个预测。我们表明，中性氢分布是对暗物质搜索的高度竞争探针，尤其是鉴于下一代射电望远镜平方公里阵列。 在第二部分中，我们通过比较通过积分与积分测量的X射线通量与质量在1 MeV和5 GEV之间的颗粒中预期的理论信号进行比较，从而获得了暗物质颗粒的灭绝横截面的限制。我们在文献中得出了有关质量在150 MeV至1.5 GEV之间的粒子上最严格的约束。这项工作的独创性在于包括由暗物质颗粒产生的电子和正上方以银河系的低能光子之间的散射作用。 在第三部分中，我们专注于一个异国情调的无线电信号，这似乎是GLEAM调查的出现，该信号似乎与宇宙网络的细丝兼容，并为我们对宇宙中结构形成的理解的支柱之一提供了直接的证据。该无线电发射可以通过质量在5-10 GEV范围内的暗物质候选者来解释，并腐烂成对电子和正电子。 该论文在不同水平上为粒子暗物质的广泛研究做出了贡献，因为我们考虑了不同类型的信号，多个目标和不同的质量尺度。
In this thesis, we examined the possibilities offered by multi-messenger astronomy in the context of indirect dark matter detection. We have applied a multi-wavelength strategy by studying different signals across the electromagnetic spectrum (gamma-rays, X-rays, radio waves) produced at different scales of the Universe (galactic, extragalactic, cosmic web filaments). In Part I, we obtained the first-ever prediction of the cross-correlation signal between the extragalactic gamma-ray flux and the 21cm line emitted by hydrogen atoms in dark matter halos. We showed that the neutral hydrogen distribution is a highly competitive probe for dark matter searches, especially in view of the next-generation radio telescope Square Kilometre Array. In Part II, we obtained the limits on the annihilation cross-section of dark matter particles by comparing the X-ray flux measured by INTEGRAL with the theoretical signal expected in the case of particles with a mass between 1 MeV and 5 GeV. We derived the most stringent constraints in the literature on such particles with a mass between 150 MeV and 1.5 GeV. The originality of this work resides in including the contribution from the scattering between the low-energy photons in the Milky Way with the electrons and positrons, produced by dark matter particles. In Part III, we focused on an exotic radio signal, emerging from the GLEAM survey, which seems compatible with a filament of the cosmic web and provides direct evidence for one of the pillars of our understanding of structure formation in the Universe. This radio emission can be explained by dark matter candidates with a mass in the range of 5-10 GeV, decaying into pairs of electrons and positrons. This thesis contributes to a broad spectrum of research for particle dark matter on different levels, since we considered different types of signals, multiple targets and different mass scales.
