论文标题
使用高能中微子作为宇宙磁力计
Using High-Energy Neutrinos As Cosmic Magnetometers
论文作者
论文摘要
磁场对于塑造由Icecube中微子望远镜看到的天体物理起源的TEV-PEV中微子的非热发射至关重要。这些中微子的来源尚不清楚，但是如果它们具有强烈的磁场，那么中微子父颗粒的同步加速器能量损失---质子，亲质和muons--留下中微子能量分布及其风味组成的特征印记。我们将高能量中微子用作“宇宙磁力计”来限制其来源的身份，通过对磁场的强度施加限制。我们在公共ICECUBE数据中寻找同步损失的证据：6年的高能量起始事件（HESE）和2年的中型能量起始事件（MESE）。在没有证据的情况下，我们将上限为10 kg-10 mg（95％c.l.）的平均磁场强度。
Magnetic fields are crucial in shaping the non-thermal emission of the TeV-PeV neutrinos of astrophysical origin seen by the IceCube neutrino telescope. The sources of these neutrinos are unknown, but if they harbor a strong magnetic field, then the synchrotron energy losses of the neutrino parent particles---protons, pions, and muons---leave characteristic imprints on the neutrino energy distribution and its flavor composition. We use high-energy neutrinos as "cosmic magnetometers" to constrain the identity of their sources by placing limits on the strength of the magnetic field in them. We look for evidence of synchrotron losses in public IceCube data: 6 years of High Energy Starting Events (HESE) and 2 years of Medium Energy Starting Events (MESE). In the absence of evidence, we place an upper limit of 10 kG-10 MG (95% C.L.) on the average magnetic field strength of the sources.
