MAGIC 揭示未证认伽马射线源 HESS J1857+026 内的复杂形态
高能天体物理现象
2014-11-19 v2
摘要
HESS J1857+026 是一个扩展的 TeV 伽马射线源，由 H.E.S.S. 在其银河系平面巡天中发现。鉴于其宽带能谱分布及其与年轻高能脉冲星 PSR J1856+0245 的空间重合性，该源被提出作为脉冲星风云（PWN）候选体。MAGIC 进行了后续观测，旨在将源映射至接近 100 GeV 的能量，以更好地理解其复杂形态。MAGIC 于 2010 年观测了 HESS J1857+026，获得了 29 小时的高质量立体数据，使我们能够在两个独立的能量范围内映射该源区域。我们在高于 150 GeV 的能量处探测到来自 HESS J1857+026 的甚高能伽马射线辐射，显著性为 。 GeV 至 TeV 之间的微分能谱由幂律函数 很好地描述，其中 ，，这填补了 Fermi-LAT 测量的 GeV 辐射与 H.E.S.S. 测量的多 TeV 辐射之间的空白。此外，我们提出了对该区域能量依赖形态的详细分析。我们将这些结果与存档的多波段数据相结合，并概述了支持双源情景的证据：其中一个源与 PWN 相关，而另一个可能与包含 HII 区和可能气体空腔的分子云复合体有关。
引用
@article{arxiv.1401.7154,
title = {MAGIC reveals a complex morphology within the unidentified gamma-ray source HESS J1857+026},
author = {MAGIC Collaboration and J. Aleksić and S. Ansoldi and L. A. Antonelli and P. Antoranz and A. Babic and P. Bangale and U. Barres de Almeida and J. A. Barrio and J. Becerra González and W. Bednarek and E. Bernardini and A. Biland and O. Blanch and S. Bonnefoy and G. Bonnoli and F. Borracci and T. Bretz and E. Carmona and A. Carosi and P. Colin and E. Colombo and J. L. Contreras and J. Cortina and S. Covino and P. Da Vela and F. Dazzi and A. De Angelis and G. De Caneva and B. De Lotto and C. Delgado Mendez and M. Doert and A. Domínguez and D. Dominis Prester and D. Dorner and M. Doro and S. Einecke and D. Eisenacher and D. Elsaesser and E. Farina and D. Ferenc and D. Fidalgo Carreto and M. V. Fonseca and L. Font and K. Frantzen and C. Fruck and R. J. García López and M. Garczarczyk and D. Garrido Terrats and M. Gaug and N. Godinović and A. González Muñoz and S. R. Gozzini and D. Hadasch and M. Hayashida and J. Herrera and A. Herrero and D. Hildebrand and J. Hose and D. Hrupec and W. Idec and V. Kadenius and H. Kellermann and S. Klepser and K. Kodani and Y. Konno and J. Krause and H. Kubo and J. Kushida and A. La Barbera and D. Lelas and N. Lewandowska and E. Lindfors and S. Lombardi and M. López and R. López-Coto and A. López-Oramas and E. Lorenz and I. Lozano and M. Makariev and K. Mallot and G. Maneva and N. Mankuzhiyil and K. Mannheim and L. Maraschi and B. Marcote and M. Mariotti and M. Martínez and D. Mazin and U. Menzel and M. Meucci and J. M. Miranda and R. Mirzoyan and A. Moralejo and P. Munar-Adrover and D. Nakajima and A. Niedzwiecki and K. Nilsson and K. Nishijima and K. Noda and N. Nowak and E. de Oña Wilhelmi and R. Orito and A. Overkemping and S. Paiano and M. Palatiello and D. Paneque and R. Paoletti and J. M. Paredes and X. Paredes-Fortuny and S. Partini and M. Persic and F. Prada and P. G. Prada Moroni and E. Prandini and S. Preziuso and I. Puljak and R. Reinthal and W. Rhode and M. Ribó and J. Rico and J. Rodriguez Garcia and S. Rügamer and A. Saggion and T. Saito and K. Saito and K. Satalecka and V. Scalzotto and V. Scapin and C. Schultz and T. Schweizer and S. N. Shore and A. Sillanpää and J. Sitarek and I. Snidaric and D. Sobczynska and F. Spanier and V. Stamatescu and A. Stamerra and T. Steinbring and J. Storz and M. Strzys and S. Sun and T. Surić and L. Takalo and H. Takami and F. Tavecchio and P. Temnikov and T. Terzić and D. Tescaro and M. Teshima and J. Thaele and O. Tibolla and D. F. Torres and T. Toyama and A. Treves and M. Uellenbeck and P. Vogler and R. M. Wagner and F. Zandanel and R. Zanin},
journal= {arXiv preprint arXiv:1401.7154},
year = {2014}
}
备注
9 pages, 6 figures. Accepted for publication in A&A