LS 5039超100 TeV伽马射线的轨道调制
高能天体物理现象
2025-03-31 v2
摘要
伽马射线二体星系由一个致密天体轨道绕行巨型伴星星系而组成。这两种物体的相互作用可驱动相对论外流（喷流或风），其中可加速粒子至百特拉电子伏特（TeV）能量。然而，仍有争议关于粒子在何处以及在何种物理条件下加速，以及质子是否可加速至太赫兹电子伏特（PeV）能量。众所周知的伽马射线二体星系之一，LS 5039是一种高质量X射线二体星系（HMXB），轨道周期为3.9天，已被H.E.S.S.等高能极端观测系统观测至TeV能量。本文 presenting对LS 5039的新观测，使用High Altitude Water Cherenkov（HAWC）观测站获得的数据。我们的数据显示，LS 5039的伽马射线光谱可延伸至200 TeV，无明显光谱截止。此外，我们以4.7的置信水平确认，2 TeV至118 TeV的辐射随系统轨道运动而调制，这表明这些光子可能在或接近二体轨道内产生，其中可发生星际光子吸收。在 leptonic情景下，HAWC检测到的最高能光子可通过约200 TeV电子逆瞬散射星际光子发射，这将需要LS 5039内极其高效的加速机制。或者，核子情景可通过20 TeV质子通过p-p或p-碰撞来解释数据，质子加速至太赫兹电子伏特（PeV）能量。
引用
@article{arxiv.2503.20947,
title = {Orbital Modulation of Gamma-Rays Beyond 100 TeV from LS 5039},
author = {R. Alfaro and M. Araya and J. C. Arteaga-Velázquez and D. Avila Rojas and H. A. Ayala Solares and R. Babu and P. Bangale and E. Belmont-Moreno and A. Bernal and K. S. Caballero-Mora and T. Capistrán and A. Carramiñana and S. Casanova and U. Cotti and J. Cotzomi and S. Coutiño de León and D. Depaoli and P. Desiati and N. Di Lalla and R. Diaz Hernandez and B. L. Dingus and M. A. DuVernois and K. Engel and T. Ergin and C. Espinoza and K. L. Fan and K. Fang and J. A. García-González and H. Goksu and A. Gonzalez Muñoz and J. A. González and M. M. González and J. A. Goodman and S. Groetsch and J. P. Harding and S. Hernández-Cadena and I. Herzog and D. Huang and F. Hueyotl-Zahuantitla and P. Hüntemeyer and S. Kaufmann and D. Kieda and A. Lara and J. Lee and H. León Vargas and J. T. Linnemann and A. L. Longinotti and G. Luis-Raya and K. Malone and O. Martinez and J. Martínez-Castro and J. A. Matthews and P. Miranda-Romagnoli and J. A. Morales-Soto and E. Moreno and M. Mostafá and M. Najafi and L. Nellen and M. U. Nisa and N. Omodei and E. Ponce and Y. Pérez and Araujo and E. G. Pérez-Pérez and C. D. Rho and A. Rodriguez Parra and D. Rosa-González and M. Roth and H. Salazar and D. Salazar-Gallegos and A. Sandoval and M. Schneider and G. Schwefer and J. Serna-Franco and A. J. Smith and Y. Son and R. W. Springer and O. Tibolla and K. Tollefson and I. Torres and R. Torres-Escobedo and R. Turner and E. Varela and X. Wang and Z. Wang and I. J. Watson and H. Wu and S. Yu and S. Yun-Cárcamo and H. Zhou and C. de León},
journal= {arXiv preprint arXiv:2503.20947},
year = {2025}
}