标题： MeV能区脉冲星研究的前景 显示英文标题

标题： Prospects for Pulsar Studies at MeV Energies

摘要： 借助费米伽马射线太空望远镜，我们现在知道年轻脉冲星和重新激活的脉冲星充满了整个伽马射线天空，我们开始理解它们的辐射机制以及它们在整个银河系中的分布。 然而，关键问题仍然存在：在银河系中心附近是否存在大量的脉冲星？ 为什么最富能量的脉冲星在MeV伽马射线中如此明亮，但在GeV能级上却并非总是如此？ 脉冲星磁层中的电子-正电子等离子体的来源和性质是什么？极帽加速器又起着什么作用？ 解决这些问题需要一个灵敏的、宽视场的MeV能级望远镜，它可以探测到由费米望远镜和硬X射线望远镜所暗示的MeV峰值脉冲星群体，并且能够表征它们的光谱形状和偏振特性。 显示英文摘要

摘要： Enabled by the Fermi Large Area Telescope, we now know young and recycled pulsars fill the gamma-ray sky, and we are beginning to understand their emission mechanism and their distribution throughout the Galaxy. However, key questions remain: Is there a large population of pulsars near the Galactic center? Why do the most energetic pulsars shine so brightly in MeV gamma rays but not always at GeV energies? What is the source and nature of the pair plasma in pulsar magnetospheres, and what role does the polar cap accelerator play? Addressing these questions calls for a sensitive, wide-field MeV telescope, which can detect the population of MeV-peaked pulsars hinted at by Fermi and hard X-ray telescopes and characterize their spectral shape and polarization.