2018年爆发期间 MAXI J1820+070 的伽马射线观测
高能天体物理现象
2022-10-07 v2
摘要
MAXI J1820+070 是一颗以黑洞为致密天体的低质量 X 射线双星。该双星在 2018 年 3 月至 10 月经历了异常明亮的 X 射线爆发，整个期间通过其射电辐射显示出非热粒子群体的证据。本文给出 H.E.S.S.、MAGIC 与 VERITAS 实验在 200 GeV 以上能量对 MAXI J1820+070 爆发的 59.5 小时联合观测结果，以及 Fermi-LAT 在 0.1 至 500 GeV 的数据与从射电到 X 射线的多波段观测。未探测到来自 MAXI J1820+070 的伽马射线发射，但所得上限与多波段数据在关于非热粒子群体与喷流同步辐射谱的合理假设下，使我们能对源性质给出有意义的约束。特别地，可以表明若源在硬态期间存在高能伽马射线发射区，其预言通量至多应低于所得 Fermi-LAT 上限 20 倍，且对显著低于能量均分值的磁场更接近该上限。在态转变期间，在电子被加速至约 500 GeV 的 plausible 假设下，多波段数据与伽马射线上限一致地导出结论：潜在的高能与甚高能伽马射线发射区应位于距黑洞 10^11 至 10^13 cm 处。未来借助 CTA 等即将问世的设备，类似低质量 X 射线双星的爆发或可被探测。
引用
@article{arxiv.2209.09785,
title = {Gamma-ray observations of MAXI J1820+070 during the 2018 outburst},
author = {H. Abe and S. Abe and V. A. Acciari and T. Aniello and S. Ansoldi and L. A. Antonelli and A. Arbet Engels and C. Arcaro and M. Artero and K. Asano and D. Baack and A. Babić and A. Baquero and U. Barres de Almeida and J. A. Barrio and I. Batković and J. Baxter and J. Becerra González and W. Bednarek and E. Bernardini and M. Bernardos and A. Berti and J. Besenrieder and W. Bhattacharyya and C. Bigongiari and A. Biland and O. Blanch and G. Bonnoli and Ž. Bošnjak and I. Burelli and G. Busetto and R. Carosi and M. Carretero-Castrillo and G. Ceribella and Y. Chai and A. Chilingarian and S. Cikota and E. Colombo and J. L. Contreras and J. Cortina and S. Covino and G. D'Amico and V. D'Elia and P. Da Vela and F. Dazzi and A. De Angelis and B. De Lotto and A. Del Popolo and M. Delfino and J. Delgado and C. Delgado Mendez and D. Depaoli and F. Di Pierro and L. Di Venere and D. Dominis Prester and A. Donini and D. Dorner and M. Doro and D. Elsaesser and G. Emery and V. 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journal= {arXiv preprint arXiv:2209.09785},
year = {2022}
}
备注
15 pages, 5 figures. Accepted for publication in MNRAS