基于 MAGIC 与 Fermi/LAT 观测的 1ES 0229+200 时变性给出的星系际磁场下限
高能天体物理现象
2023-02-22 v1 宇宙学与河外天体物理
摘要
高能 TeV 源周围由伽马射线在星系际介质中传播效应所诱发的延展且延迟的发射，可用于测量星系际磁场（IGMF）。我们搜寻硬谱 TeV 耀变体 1ES 0229+200 的延迟 GeV 发射，旨在探测或约束 TeV 伽马射线在星系际介质传播过程中生成的依赖于 IGMF 的次级通量。我们分析了 MAGIC 最近 5 年跨度内的观测，并辅以 H.E.S.S. 和 VERITAS 望远镜的历史数据以及 Fermi/LAT 望远镜长达 12 年的曝光。我们利用它们在一年半的时间跨度内追踪该源在 GeV–TeV 能段的演化。我们使用蒙特卡洛模拟来预测由 TeV 能段观测所揭示的、受源变率调制的延迟次级伽马射线通量。随后，我们将这些针对不同假定 IGMF 强度的预测与所有可得的伽马射线通量演化测量进行比较。我们发现，在超过 200 GeV 能段，源通量在 14 年观测跨度内围绕其平均值发生涨落。在 Fermi/LAT 可探测的 1–100 GeV 能段内未发现通量变率证据。由于未探测到由星系际介质中发展的电磁级联所产生的延迟发射引起的变率，我们给出了长关联长度 IGMF 的下限 B>1.8e-17 G，以及宇宙学起源 IGMF 的下限 B>1e-14 G。尽管该下限弱于此前基于 Fermi/LAT 数据分析所得，但它更为稳健，因其基于保守的内禀源谱估计并考虑了 TeV 能段源变率的细节。我们讨论了该下限对可能解释宇宙重子不对称性的宇宙学磁场的启示。
引用
@article{arxiv.2210.03321,
title = {A lower bound on intergalactic magnetic fields from time variability of 1ES 0229+200 from MAGIC and Fermi/LAT observations},
author = {MAGIC Collaboration and V. A. Acciari and I. Agudo and T. Aniello and S. Ansoldi and L. A. Antonelli and A. Arbet Engels 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. 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 H. Bökenkamp and G. Bonnoli and Ž. Bošnjak and I. Burelli and G. Busetto and R. Carosi and G. Ceribella and M. Cerruti 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 E. Do Souto Espiñeira and D. Dominis Prester and A. Donini and D. Dorner and M. Doro and D. Elsaesser and V. Fallah Ramazani and L. Fariña and A. Fattorini and L. Font and C. Fruck and S. Fukami and Y. Fukazawa and R. J. García López and M. Garczarczyk and S. Gasparyan and M. Gaug and N. Giglietto and F. Giordano and P. Gliwny and N. Godinović and J. G. Green and D. Green and D. Hadasch and A. Hahn and T. Hassan and L. Heckmann and J. Herrera and D. Hrupec and M. Hütten and T. Inada and R. Iotov and K. Ishio and Y. Iwamura and I. Jiménez Martínez and J. Jormanainen and L. Jouvin and D. Kerszberg and Y. Kobayashi and H. Kubo and J. Kushida and A. Lamastra and D. Lelas and F. Leone and E. Lindfors and L. Linhoff and I. Liodakis and S. Lombardi and F. Longo and R. López-Coto and M. López-Moya and A. López-Oramas and S. Loporchio and A. Lorini and B. Machado de Oliveira Fraga and C. Maggio and P. Majumdar and M. Makariev and M. Mallamaci and G. Maneva and M. Manganaro and K. Mannheim and M. Mariotti and M. Martínez and A. Mas Aguilar and D. Mazin and S. Menchiari and S. Mender and S. Mićanović and D. Miceli and T. Miener and J. M. Miranda and R. Mirzoyan and E. Molina and H. A. Mondal and A. Moralejo and D. Morcuende and V. Moreno and E. Moretti and T. Nakamori and C. Nanci and L. Nava and V. Neustroev and M. Nievas Rosillo and C. Nigro and K. Nilsson and K. Nishijima and K. Noda and S. Nozaki and Y. Ohtani and T. Oka and J. Otero-Santos and S. Paiano and M. Palatiello and D. Paneque and R. Paoletti and J. M. Paredes and L. Pavletić and P. Peñil and M. Persic and M. Pihet and P. G. Prada Moroni and E. Prandini and C. Priyadarshi and I. Puljak and W. Rhode and M. Ribó and J. Rico and C. Righi and A. Rugliancich and N. Sahakyan and T. Saito and S. Sakurai and K. Satalecka and F. G. Saturni and B. Schleicher and K. Schmidt and F. Schmuckermaier and J. L. Schubert and T. Schweizer and J. Sitarek and I. Šnidarić and D. Sobczynska and A. Spolon and A. Stamerra and J. Strišković and D. Strom and M. Strzys and Y. Suda and T. Surić and M. Takahashi and R. Takeishi and F. Tavecchio and P. Temnikov and T. Terzić and M. Teshima and L. Tosti and S. Truzzi and A. Tutone and S. Ubach and J. van Scherpenberg and G. Vanzo and M. Vazquez Acosta and S. Ventura and V. Verguilov and I. Viale and C. F. Vigorito and V. Vitale and I. Vovk and M. Will and C. Wunderlich and T. Yamamoto and D. Zarić and A. Neronov and D. Semikoz and A. Korochkin},
journal= {arXiv preprint arXiv:2210.03321},
year = {2023}
}
备注
10 pages, 5 figures, accepted to A&A. Corresponding authors: Ievgen Vovk, Paolo Da Vela (mailto:[email protected]) and Andrii Neronov (mailto:[email protected])