研究TeV耀变体1ES 1959+650的宽带变异性
高能天体物理现象
2015-06-23 v1
摘要
我们总结了TeV耀变体1ES 1959+650的宽带观测，包括由机器人望远镜Super-LOTIS和iTelescope进行的光学R波段观测、Swift UVOT的紫外观测、Swift X射线望远镜（XRT）的X射线观测、费米大面积望远镜（LAT）的高能伽马射线观测以及VERITAS在315 GeV以上的甚高能（VHE）伽马射线观测，所有观测均在2012年4月17日至2012年6月1日（MJD 56034和56079）之间进行。在简单的同步自康普顿（SSC）模型背景下，探讨了宽带谱能量分布的同期变异性。在SSC发射情景中，我们发现表示高态所需的参数与低态显著不同。受耀变体附近可能存在气体证据的启发，我们还研究了一种反射发射模型来描述观测到的变异性模式。该模型假设来自喷流的非热发射被附近的气体云反射，使得反射发射重新进入团块，并产生升高的伽马射线态，而同步辐射通量没有同时升高。这里应用的模型虽然不需要解释观测到的变异性模式，但代表了一种可能描述观测的情景。当应用于观测期间单个夜晚观测到的、为蟹状星云通量66%的升高VHE态时，反射发射情景不支持纯轻子非热发射机制。然而，反射发射模型确实预测了一个反射光子场，其能量足以通过能量在10到100 TeV之间的质子产生π介子，从而产生升高的伽马射线发射。
引用
@article{arxiv.1412.1031,
title = {Investigating Broadband Variability of the TeV Blazar 1ES 1959+650},
author = {E. Aliu and S. Archambault and T. Arlen and T. Aune and A. Barnacka and M. Beilicke and W. Benbow and K. Berger and R. Bird and A. Bouvier and J. H. Buckley and V. Bugaev and M. Cerruti and X. Chen and L. Ciupik and E. Collins-Hughes and M. P. Connolly and W. Cui and J. Dumm and J. D. Eisch and A. Falcone and S. Federici and Q. Feng and J. P. Finley and H. Fleischhack and P. Fortin and L. Fortson and A. Furniss and N. Galante and G. H. Gillanders and S. Griffin and S. T. Griffiths and J. Grube and G. Gyuk and N. Hakansson and D. Hanna and J. Holder and G. Hughes and T. B. Humensky and C. A. Johnson and P. Kaaret and P. Kar and M. Kertzman and Y. Khassen and D. Kieda and H. Krawczynski and F. Krennrich and M. J. Lang and A. S Madhavan and P. Majumdar and S. McArthur and A. McCann and K. Meagher and J. Millis and P. Moriarty and R. Mukherjee and T. Nelson and D. Nieto and A. O'Faolain de Bhroithe and R. A. Ong and A. N. Otte and N. Park and J. S. Perkins and M. Pohl and A. Popkow and H. Prokoph and J. Quinn and K. Ragan and J. Rajotte and L. C. Reyes and P. T. Reynolds and G. T. Richards and E. Roache and A. Sadun and M. Santander and G. H. Sembroski and K. Shahinyan and F. Sheidaei and A. W. Smith and D. Staszak and I. Telezhinsky and M. Theiling and J. Tyler and A. Varlotta and V. V. Vassiliev and S. Vincent and S. P. Wakely and T. C. Weekes and A. Weinstein and R. Welsing and A. Wilhelm and D. A. Williams and B. Zitzer and M. Böttcher and M. Fumagalli},
journal= {arXiv preprint arXiv:1412.1031},
year = {2015}
}
备注
Accepted by ApJ