论文标题
在近红外背景中搜索类似轴突的粒子衰减：更新的分析
Searching for axion-like particle decay in the near-infrared background: an updated analysis
论文作者
论文摘要
外乳外背景光由整个宇宙历史上所有星系的累积辐射组成。在近红外（IR）频率下，这种背景的各向异性的角功率谱缺乏完整的理解，并且表现出可靠的多余，无法通过已知来源轻松解释。用电子伏周围有质量的轴状颗粒（ALP）形式的暗物质会腐烂成两个光子，并在近IR带中具有波长，可能会导致背景强度。我们计算近红外背景角功率谱，包括星系的排放，以及北洛内部光线和ALP衰减的贡献，并将其与哈勃太空望远镜和Spitzer的测量结果进行比较。我们发现，ALP质量和ALP-Photon耦合的首选值可以解释过量的量与恒星冷却数据和矮球星系的观察结果。
The extragalactic background light is comprised of the cumulative radiation from all galaxies across the history of the universe. The angular power spectrum of the anisotropies of such a background at near-infrared (IR) frequencies lacks of a complete understanding and shows a robust excess which cannot be easily explained with known sources. Dark matter in the form of axion-like particles (ALPs) with a mass around the electronvolt will decay into two photons with wavelengths in the near-IR band, possibly contributing to the background intensity. We compute the near-IR background angular power spectrum including emissions from galaxies, as well as the contributions from the intra-halo light and ALP decay, and compare it to measurements from the Hubble Space Telescope and Spitzer. We find that the preferred values for the ALP mass and ALP-photon coupling to explain the excess are in tension with star cooling data and observations of dwarf spheroidal galaxies.
