论文标题
强宇宙磁场的伽马射线测量值的灵敏度达到
Sensitivity reach of gamma-ray measurements for strong cosmological magnetic fields
论文作者
论文摘要
具有1-10 pg范围内强度的原始磁场可以解决哈勃常数的不同测量值之间的张力，并为21 cm线中的多余性提供在红移$ 15 <z <20 $中的多余性，如果在重组期间存在，则它存在。该领域还可以在当今宇宙中大规模结构的空隙中生存。我们研究了使用CTA望远镜的最近的硬光谱Blazar（S）深入暴露，研究了伽马射线技术对这种相对强的宇宙学磁场进行测量的灵敏度。我们表明，伽马射线测量方法可以感觉到原始磁场的强度高达$ 10^{ - 11} $ 〜g。因此，宇宙微波背景和伽马射线约束的结合可以感知到可能的宇宙学磁场的全部范围，以确认或排除其与宇宙磁场起源问题的相关性，以及它们对重组和恢复时期的影响。
A primordial magnetic field with the strength in the 1-10 pG range can resolve the tension between different measurements of the Hubble constant and provide an explanation for the excess opacity in the 21 cm line at redshift $15<z<20$, if it is present during the recombination and reionization epochs. This field can also survive in the voids of the large-scale Structure in the present day universe. We study the sensitivity reach of the gamma-ray technique for measurement of such relatively strong cosmological magnetic field using deep exposure(s) of the nearest hard spectrum blazar(s) with CTA telescopes. We show that the gamma-ray measurement method can sense the primordial magnetic field with a strength of up to $10^{-11}$~G. Combination of the cosmic microwave background and gamma-ray constraints can thus sense the full range of possible cosmological magnetic fields to confirm or rule out their relevance to the problem of the origin of cosmic magnetic fields, as well as their influence on recombination and reionization epochs.
