VERITAS发现CTA 1的TeV伽马射线发射
高能天体物理现象
2015-06-12 v1
摘要
我们报告了利用VERITAS伽马射线天文台发现与壳型射电超新星遗迹CTA 1位置重合的TeV伽马射线发射。源VER J0006+729被检测为背景上的6.5标准差超出，并显示出延展形态，近似为半长轴（半短轴）0.30度（0.24度）的二维高斯分布，其中心位于费米伽马射线脉冲星PSR J0007+7303及其X射线脉冲星风云（PWN）的5角分处。光子谱很好地由幂律dN/dE = N_0 (E/3 TeV)^(-\Gamma)描述，微分谱指数\Gamma = 2.2 +- 0.2_stat +- 0.3_sys，归一化常数N_0 = (9.1 +- 1.3_stat +- 1.7_sys) x 10^(-14) cm^(-2) s^(-1) TeV^(-1)。1 TeV以上的积分流量F_\gamma = 4.0 x 10^(-12) erg cm^(-2) s^(-1)，对应1.4 kpc处脉冲星自转能损的0.2%。能量学、与超新星遗迹的位置重合以及TeV发射相对较小的延展强烈支持TeV光子的脉冲星风云起源。我们考虑了CTA 1中TeV发射的起源。
引用
@article{arxiv.1212.4739,
title = {Discovery of TeV Gamma-ray Emission from CTA 1 by VERITAS},
author = {E. Aliu and S. Archambault and T. Arlen and T. Aune and M. Beilicke and W. Benbow and A. Bouvier and J. H. Buckley and V. Bugaev and A. Cesarini and L. Ciupik and E. Collins-Hughes and M. P. Connolly and W. Cui and R. Dickherber and C. Duke and J. Dumm and V. V. Dwarkadas and M. Errando and A. Falcone and S. Federici and Q. Feng and J. P. Finley and G. Finnegan and L. Fortson and A. Furniss and N. Galante and D. Gall and G. H. Gillanders and S. Godambe and E. V. Gotthelf and S. Griffin and J. Grube and G. Gyuk and D. Hanna and J. Holder and G. Hughes and T. B. Humensky and P. Kaaret and O. Kargaltsev and N. Karlsson and Y. Khassen and D. Kieda and H. Krawczynski and F. Krennrich and M. J. Lang and K. Lee and A. S Madhavan and G. Maier and P. Majumdar and S. McArthur and A. McCann and P. Moriarty and R. Mukherjee and T. Nelson and A. O'Faolain de Bhroithe and R. A. Ong and M. Orr and A. N. Otte and N. Park and J. S. Perkins and M. Pohl and H. Prokoph and J. Quinn and K. Ragan and L. C. Reyes and P. T. Reynolds and E. Roache and M. Roberts and D. B. Saxon and M. Schroedter and G. H. Sembroski and P. Slane and A. W. Smith and D. Staszak and I. Telezhinsky and G. Tesic and M. Theiling and S. Thibadeau and K. Tsurusaki and J. Tyler and A. Varlotta and V. V. Vassiliev and S. Vincent and M. Vivier and S. P. Wakely and T. C. Weekes and A. Weinstein and R. Welsing and D. A. Williams and B. Zitzer},
journal= {arXiv preprint arXiv:1212.4739},
year = {2015}
}
备注
10 pages, 9 figures, accepted for publication in ApJ