VERITAS 对矮椭球星系 Segue 1 的深度观测
高能天体物理现象
2019-08-13 v2 高能物理 - 实验
摘要
VERITAS 切伦科夫望远镜阵列对邻近的矮椭球星系 Segue 1 执行了深度观测计划。我们报告了 2010 年 1 月至 2011 年 5 月期间获取的近 48 小时高质量精选数据的结果。在 Segue 1 的标称位置未检测到显著的 -射线发射，并导出了积分通量的上限。根据最近的研究，Segue 1 是目前已知暗物质主导程度最高的矮椭球星系。我们对各种湮灭和衰变暗物质粒子模型导出了严格的限制。速度加权湮灭截面的上限为 \mathrm{<\sigma v >^{95% CL} \lesssim 10^{-23} cm^{3} s^{-1}}，对于暗物质粒子质量 ，这一结果将此前对矮椭球星系观测的限制提高了至少两倍。衰变寿命的下限达到 \mathrm{\tau^{95% CL} \gtrsim 10^{24} s} 量级。最后，我们探讨了 ATIC 和 PAMELA 测量的宇宙射线轻子异常在暗物质湮灭框架下的解释，并表明 VERITAS 对 Segue 1 的观测不支持这种情景。
引用
@article{arxiv.1202.2144,
title = {VERITAS Deep Observations of the Dwarf Spheroidal Galaxy Segue 1},
author = {E. Aliu and S. Archambault and T. Arlen and T. Aune and M. Beilicke and W. Benbow and A. Bouvier and S. M. Bradbury and J. H. Buckley and V. Bugaev and K. Byrum and A. Cannon and A. Cesarini and J. L. Christiansen and L. Ciupik and E. Collins-Hughes and M. P. Connolly and W. Cui and G. Decerprit and R. Dickherber and J. Dumm and M. Errando and A. Falcone and Q. Feng and F. Ferrer and J. P. Finley and G. Finnegan and L. Fortson and A. Furniss and N. Galante and D. Gall and S. Godambe and S. Griffin and J. Grube and G. Gyuk and D. Hanna and J. Holder and H. Huan and G. Hughes and T. B. Humensky and P. Kaaret and N. Karlsson and M. Kertzman and Y. Khassen and D. Kieda and H. Krawczynski and F. Krennrich 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 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 H. J. Rose and J. Ruppel and D. B. Saxon and M. Schroedter and G. H. Sembroski and G. D. Senturk and C. Skole and A. W. Smith and D. Staszak and I. Telezhinsky and G. Tesic and M. Theiling and S. Thibadeau and K. Tsurusaki and A. Varlotta and V. V. Vassiliev and S. Vincent and M. Vivier and R. G. Wagner and S. P. Wakely and J. E. Ward and T. C. Weekes and A. Weinstein and T. Weisgarber and D. A. Williams and B. Zitzer},
journal= {arXiv preprint arXiv:1202.2144},
year = {2019}
}
备注
Added recently published erratum at the end of the original article