Laboratoire de Physique Théorique et Hautes Energies (LPTHE), CNRS and Sorbonne Université, 4 Place Jussieu, Paris, France.
Phys Rev Lett. 2019 Feb 1;122(4):041104. doi: 10.1103/PhysRevLett.122.041104.
Primordial black holes (PBHs) with a mass M≲10^{17} g are expected to inject sub-GeV electrons and positrons in the Galaxy via Hawking radiation. These cosmic rays are shielded by the solar magnetic field for Earth-bound detectors, but not for Voyager 1, which is now beyond the heliopause. We use its data to constrain the fraction of PBHs to the dark matter in the Galaxy, finding that PBHs with M<10^{16} g cannot contribute more than 0.1% (or less for a log-normal mass distribution). Our limits are based on local Galactic measurements and are thus complementary to those derived from cosmological observations.
原始黑洞（PBHs）的质量 M≲10^{17} g，预计通过霍金辐射向银河系注入亚GeV 电子和正电子。这些宇宙射线在地球探测器中受到太阳磁场的屏蔽，但对于旅行者 1 号来说则不然，因为它现在已经超出了日球层顶。我们利用旅行者 1 号的数据来限制银河系中 PBHs 相对于暗物质的比例，发现质量为 M<10^{16} g 的 PBHs 不能超过暗物质的 0.1%（对于对数正态质量分布则更小）。我们的限制基于本地银河系测量，因此与那些从宇宙观测中得出的限制互补。
