费米-LAT对高能日面边缘后太阳耀斑的观测
太阳与恒星天体物理
2017-02-03 v1 高能天体物理现象
摘要
我们报道了费米-LAT对发生于2013年10月11日、2014年1月6日和9月1日的日面边缘后（BTL）太阳耀斑高能辐射的探测。根据STEREO的测定，这些费米-LAT观测与源自东、西边缘后活动区产生的耀斑相关。所有三次耀斑均与极快日冕物质抛射（CMEs）和强太阳高能粒子事件相关。我们给出了>100 MeV光子辐射的更新定位、硬X射线（HXR）和EUV图像、从10 keV到10 GeV的宽波段能谱以及微波能谱。我们还对费米-LAT探测到的BTL耀斑与三次日面耀斑进行了比较，并研究了其中一些显著物理量，试图更好地理解这些被遮挡耀斑中起作用的加速机制。我们将HXR辐射解释为来自日冕薄靶环顶的电子轫致辐射，其加速电子能谱在半相对论能量处变陡。>100 MeV伽马射线最好用厚靶光球源中质子（及其他离子）相互作用产生的π介子衰变模型来描述。认为质子在CME环境中被加速（至能量>10 GeV），并从CME激波下游侧沉淀降至光球，落在太阳正面，远离初始耀斑位置和HXR辐射。
引用
@article{arxiv.1702.00577,
title = {Fermi-LAT Observations of High-energy Behind-the-limb Solar Flares},
author = {M. Ackermann and A. Allafort and L. Baldini and G. Barbiellini and D. Bastieri and R. Bellazzini and E. Bissaldi and R. Bonino and E. Bottacini and J. Bregeon and P. Bruel and R. Buehler and R. A. Cameron and M. Caragiulo and P. A. Caraveo and E. Cavazzuti and C. Cecchi and E. Charles and S. Ciprini and F. Costanza and S. Cutini and F. D'Ammando and F. de Palma and R. Desiante and S. W. Digel and N. Di Lalla and M. Di Mauro and L. Di Venere and P. S. Drell and C. Favuzzi and Y. Fukazawa and P. Fusco and F. Gargano and N. Giglietto and F. Giordano and M. Giroletti and I. A. Grenier and L. Guillemot and S. Guiriec and T. Jogler and G. Jóhannesson and L. Kashapova and S. Krucker and M. Kuss and G. La Mura and S. Larsson and L. Latronico and J. Li and W. Liu and F. Longo and F. Loparco and P. Lubrano and J. D. Magill and S. Maldera and A. Manfreda and M. N. Mazziotta and W. Mitthumsiri and T. Mizuno and M. E. Monzani and A. Morselli and I. V. Moskalenko and M. Negro and E. Nuss and T. Ohsugi and N. Omodei and E. Orlando and V. Pal'shin and D. Paneque and J. S. Perkins and M. Pesce-Rollins and V. Petrosian and F. Piron and G. Principe and S. Rainò and R. Rando and M. Razzano and O. Reimer and F. Rubio da Costa and C. Sgrò and D. Simone and E. J. Siskind and F. Spada and G. Spandre and P. Spinelli and H. Tajima and J. B. Thayer and D. F. Torres and E. Troja and G. Vianello},
journal= {arXiv preprint arXiv:1702.00577},
year = {2017}
}
备注
13 pages, 14 figures published on ApJ