银河系PeVatron候选体LHAASO J2108+5157的多波段研究
高能天体物理现象
2023-05-10 v4
摘要
LHAASO J2108+5157是近期由LHAASO合作组发现的少数几个无甚高能(VHE)对应体、未证认的超高能(UHE)伽马射线源之一。我们于2021年使用XMM-Newton在X射线波段观测了LHAASO J2108+5157，总曝光3.8小时，并使用大尺寸望远镜原型(LST-1)在TeV能段观测，获得49小时高质量数据。此外，我们分析了12年的Fermi-LAT数据，以更好地约束其高能(HE)对应体4FGL J2108.0+5155的辐射。我们在LST-1数据中发现能量E > 3 TeV处的超出(3.7 sigma)。在假设点源的前提下对LST-1全能段进一步分析，得到硬谱辐射的线索(2.2 sigma)，可用0.3–100 TeV间光子指数Gamma = 1.6 ± 0.2的单幂律描述。我们在XMM-Newton数据中未发现任何可能与超新星遗迹(SNR)或脉冲星风云(PWN)相关的显著延展辐射，这对相对论电子可能的同步辐射给出了强约束。LST-1与LHAASO的观测可解释为截止能量为 TeV的相对论电子的逆康普顿主导轻子辐射。X射线同步辐射上限所要求的源区低磁场与PWN或TeV晕的假设相容。UHE源附近缺乏脉冲星对PWN/TeV晕图景构成挑战。UHE伽马射线也可解释为相对论质子与源方向上两个已知分子云之一相互作用产生的、衰变主导的强子辐射。LST-1能段的硬谱与质子从中年SNR周围激波逃逸因其高低温截止相符。
引用
@article{arxiv.2210.00775,
title = {Multi-wavelength study of the galactic PeVatron candidate LHAASO J2108+5157},
author = {S. Abe and A. Aguasca-Cabot and I. Agudo and N. Alvarez Crespo and L. A. Antonelli and C. Aramo and A. Arbet-Engels and M. Artero and K. Asano and P. Aubert and A. Baktash and A. Bamba and A. Baquero Larriva and L. Baroncelli and U. Barres de Almeida and J. A. Barrio and I. Batkovic and J. Baxter and J. Becerra González and E. Bernardini and M. I. Bernardos and J. Bernete Medrano and A. Berti and P. Bhattacharjee and N. Biederbeck and C. Bigongiari and E. Bissaldi and O. Blanch and P. Bordas and C. Buisson and A. Bulgarelli and I. Burelli and M. Buscemi and M. Cardillo and S. Caroff and A. Carosi and F. Cassol and D. Cauz and G. Ceribella and Y. Chai and K. Cheng and A. Chiavassa and M. Chikawa and L. Chytka and A. Cifuentes and J. L. Contreras and J. Cortina and H. Costantini and G. D'Amico and M. Dalchenko and A. De Angelis and M. de Bony de Lavergne and B. De Lotto and R. de Menezes and G. Deleglise and C. Delgado and J. Delgado Mengual and D. della Volpe and M. Dellaiera and A. Di Piano and F. Di Pierro and R. Di Tria and L. Di Venere and C. Díaz and R. M. Dominik and D. Dominis Prester and A. Donini and D. Dorner and M. Doro and D. Elsässer and G. Emery and J. Escudero and V. Fallah Ramazani and G. Ferrara and A. Fiasson and L. Freixas Coromina and S. Fröse and S. Fukami and Y. Fukazawa and E. Garcia and R. Garcia López and D. Gasparrini and D. Geyer and J. Giesbrecht Paiva and N. Giglietto and F. Giordano and E. Giro and P. Gliwny and N. Godinovic and R. Grau and D. Green and J. Green and S. Gunji and J. Hackfeld and D. Hadasch and A. Hahn and K. Hashiyama and T. Hassan and K. Hayashi and L. Heckmann and M. Heller and J. Herrera Llorente and K. Hirotani and D. Hoffmann and D. Horns and J. Houles and M. Hrabovsky and D. Hrupec and D. Hui and M. Hütten and R. Imazawa and T. Inada and Y. Inome and K. Ioka and M. Iori and K. Ishio and Y. Iwamura and M. Jacquemont and I. Jimenez Martinez and J. Jurysek and M. Kagaya and V. Karas and H. Katagiri and J. Kataoka and D. Kerszberg and Y. Kobayashi and A. Kong and H. Kubo and J. Kushida and M. Lainez and G. Lamanna and A. Lamastra and T. Le Flour and M. Linhoff and F. Longo and R. López-Coto and M. López-Moya and A. López-Oramas and S. Loporchio and A. Lorini and P. L. Luque-Escamilla and P. Majumdar and M. Makariev and D. Mandat and M. Manganaro and G. Manicò and K. Mannheim and M. Mariotti and P. Marquez and G. Marsella and J. Martí and O. Martinez and G. Martínez and M. Martínez and P. Marusevec and A. Mas-Aguilar and G. Maurin and D. Mazin and E. Mestre Guillen and S. Micanovic and D. Miceli and T. Miener and J. M. Miranda and R. Mirzoyan and T. Mizuno and M. Molero Gonzalez and E. Molina and T. Montaruli and I. Monteiro and A. Moralejo and D. Morcuende and A. Morselli and K. Mrakovcic and K. Murase and A. Nagai and T. Nakamori and L. Nickel and M. Nievas and K. Nishijima and K. Noda and D. Nosek and S. Nozaki and M. Ohishi and Y. Ohtani and N. Okazaki and A. Okumura and R. Orito and J. Otero-Santos and M. Palatiello and D. Paneque and F. R. Pantaleo and R. Paoletti and J. M. Paredes and L. Pavletić and M. Pech and M. Pecimotika and E. Pietropaolo and G. Pirola and F. Podobnik and V. Poireau and M. Polo and E. Pons and E. Prandini and J. Prast and C. Priyadarshi and M. Prouza and R. Rando and W. Rhode and M. Ribó and V. Rizi and G. Rodriguez Fernandez and T. Saito and S. Sakurai and D. A. Sanchez and T. Šarić and F. G. Saturni and J. Scherpenberg and B. Schleicher and F. Schmuckermaier and J. L. Schubert and F. Schussler and T. Schweizer and M. Seglar Arroyo and J. Sitarek and V. Sliusar and A. Spolon and J. Strišković and M. Strzys and Y. Suda and Y. Sunada and H. Tajima and M. Takahashi and H. Takahashi and J. Takata and R. Takeishi and P. H. T. Tam and S. J. Tanaka and D. Tateishi and P. Temnikov and Y. Terada and K. Terauchi and T. Terzic and M. Teshima and M. Tluczykont and F. Tokanai and D. F. Torres and P. Travnicek and S. Truzzi and A. Tutone and G. Uhlrich and M. Vacula and M. Vázquez Acosta and V. Verguilov and I. Viale and A. Vigliano and C. F. Vigorito and V. Vitale and G. Voutsinas and I. Vovk and T. Vuillaume and R. Walter and M. Will and T. Yamamoto and R. Yamazaki and T. Yoshida and T. Yoshikoshi and N. Zywucka and M. Balbo and D. Eckert and A. Tramacere},
journal= {arXiv preprint arXiv:2210.00775},
year = {2023}
}
备注
26 pages, 9 figures, 5 tables; Astronomy and Astrophysics (accepted on 6 March 2023)