McGill University, Department of Physics, 3600 University Street, Montréal, Quebec H3A2T8 Canada.
Phys Rev Lett. 2023 Mar 3;130(9):091402. doi: 10.1103/PhysRevLett.130.091402.
Neutrino emission in coincidence with gamma rays has been observed from the blazar TXS 0506+056 by the IceCube telescope. Neutrinos from the blazar had to pass through a dense spike of dark matter (DM) surrounding the central black hole. The observation of such a neutrino implies new upper bounds on the neutrino-DM scattering cross section as a function of DM mass. The constraint is stronger than existing ones for a range of DM masses, if the cross section rises linearly with energy. For constant cross sections, competitive bounds are also possible, depending on details of the DM spike.
冰立方望远镜观测到耀变体 TXS 0506+056 的伽马射线与中微子的同时爆发。来自耀变体的中微子必须穿过环绕中央黑洞的暗物质（DM）密集尖峰。这种中微子的观测对作为暗物质质量函数的中微子-DM 散射截面施加了新的上限。如果截面随能量线性上升，则在一系列暗物质质量范围内，该约束比现有约束更为严格。对于恒定截面，也可能存在竞争约束，具体取决于 DM 尖峰的细节。
