论文标题
宇宙光学背景过多，暗物质和线强度映射
The cosmic optical background excess, dark matter, and line-intensity mapping
论文作者
论文摘要
使用新视野Lorri图像的最新研究已将宇宙光学背景的最精确度量归还到迄今为止，从而超过了深层星系计数预期的通量约为两个。我们调查了在$ \ sim4σ$显着性下检测到的过量是否是由于衰减单烯晶光子的轴突样暗物质。我们从这种衰减中计算光谱能分布以及对Lorri测得的通量的贡献。假设类似轴的颗粒构成了所有暗物质，那么迄今为止未限制的参数空间分别解释了测得的多余跨度质量和有效的轴轴 - 光子耦合，分别为8-20 ev质量和3-6 $ \ times 10^{ - 11} $ gev $ gev $^{ - 1} $。如果多余的衰减引起到光子线，则在即将到来的线强度映射测量结果中将有明显的信号，这将使该假设与其他候选者歧视。
Recent studies using New Horizons LORRI images have returned the most precise measurement of the cosmic optical background to date, yielding a flux that exceeds that expected from deep galaxy counts by roughly a factor of two. We investigate whether this excess, detected at $\sim 4σ$ significance, is due to axion-like dark matter that decays to monoenergetic photons. We compute the spectral energy distribution from such decays and the contribution to the flux measured by LORRI. Assuming that axion-like particles make up all of the dark matter, the parameter space unconstrained to date that explains the measured excess spans masses and effective axion-photon couplings of 8 - 20 eV masses and 3 - 6 $\times 10^{-11}$ GeV$^{-1}$, respectively. If the excess arises from dark-matter decay to a photon line, there will be a significant signal in forthcoming line-intensity mapping measurements that will allow the discrimination of this hypothesis from other candidates.
