利用 IceTop 空气簇射阵列观测宇宙射线各向异性
高能天体物理现象
2013-02-19 v4
摘要
我们报告了在 PeV 能量下宇宙射线到达方向分布中各向异性的观测结果。该分析基于 2009 年至 2012 年间在南极利用 IceTop 空气簇射阵列采集的数据。IceTop 是 IceCube 探测器的一个组成部分，对 100 TeV 至 1 EeV 之间的宇宙射线敏感。凭借当前 IceTop 数据集的规模，对 10^-3 量级各向异性的搜索首次得以扩展至 PeV 能量。我们将数据集分为两部分，其中位能量分别为 400 TeV 和 2 PeV。在低能段，我们观测到一个强烈的缺失区，其角尺寸约为 30 度，幅度为 (-1.58 +/- 0.46 (stat) +/- 0.52 (sys)) x 10^(-3)，位置与此前利用 IceCube 中微子探测器观测宇宙射线的结果一致。对高能段的研究表明，各向异性持续存在至 PeV 能量，且幅度增加至 (-3.11 +/- 0.38 (stat) +/- 0.96 (sys)) x 10^(-3)。
引用
@article{arxiv.1210.5278,
title = {Observation of Cosmic Ray Anisotropy with the IceTop Air Shower Array},
author = {IceCube Collaboration and M. G. Aartsen and R. Abbasi and Y. Abdou and M. Ackermann and J. Adams and J. A. Aguilar and M. Ahlers and D. Altmann and K. Andeen and J. Auffenberg and X. Bai and M. Baker and S. W. Barwick and V. Baum and R. Bay and K. Beattie and J. J. Beatty and S. Bechet and J. Becker Tjus and K. -H. Becker and M. Bell and M. L. Benabderrahmane and S. BenZvi and J. Berdermann and P. Berghaus and D. Berley and E. Bernardini and D. Bertrand and D. Z. Besson and D. Bindig and M. Bissok and E. Blaufuss and J. Blumenthal and D. J. Boersma and S. Bohaichuk and C. Bohm and D. Bose and S. Böser and O. Botner and L. Brayeur and A. M. Brown and R. Bruijn and J. Brunner and M. Carson and J. Casey and M. Casier and D. Chirkin and B. Christy and K. Clark and F. Clevermann and S. Cohen and D. F. Cowen and A. H. Cru. Silva and M. Danninger and J. Daughhetee and J. C. Davis and C. D. Clercq and S. D. Ridder and F. Descamps and P. Desiati and G. d. Vries-Uiterweerd and T. DeYoung and J. C. Díaz-Vélez and J. Dreyer and J. P. Dumm and M. Dunkman and R. Eagan and J. Eisch and R. W. Ellsworth and O. Engdegård and S. Euler and P. A. Evenson and O. Fadiran and A. R. Fazely and A. Fedynitch and J. Feintzeig and T. Feusels and K. Filimonov and C. Finley and T. Fischer-Wasels and S. Flis and A. Franckowiak and R. Franke and K. Frantzen and T. Fuchs and T. K. Gaisser and J. Gallagher and L. Gerhardt and L. Gladstone and T. Glüsenkamp and A. Goldschmidt and G. Golup and J. A. Goodman and D. Góra and D. Grant and A. Groß and S. Grullon and M. Gurtner and C. Ha and A. Ha. Ismail and A. Hallgren and F. Halzen and K. Hanson and D. Heereman and P. Heimann and D. Heinen and K. Helbing and R. Hellauer and S. Hickford and G. C. Hill and K. D. Hoffman and R. Hoffmann and A. Homeier and K. Hoshina and W. Huelsnitz and P. O. Hulth and K. Hultqvist and S. Hussain and A. Ishihara and E. Jacobi and J. Jacobsen and G. S. Japaridze and O. Jlelati and A. Kappes and T. Karg and A. Karle and J. Kiryluk and F. Kislat and J. Kläs and S. R. Klein and J. -H. Köhne and G. Kohnen and H. Kolanoski and L. Köpke and C. Kopper and S. Kopper and D. J. Koskinen and M. Kowalski and M. Krasberg and G. Kroll and J. Kunnen and N. Kurahashi and T. Kuwabara and M. Labare and H. Landsman and M. J. Larson and R. Lauer and M. Lesiak-Bzdak and J. Lünemann and J. Madsen and R. Maruyama and K. Mase and H. S. Matis and F. McNally and K. Meagher and M. Merck and P. Mészáros and T. Meures and S. Miarecki and E. Middell and N. Milke and J. Miller and L. Mohrmann and T. Montaruli and R. Morse and R. Nahnhauer and U. Naumann and S. C. Nowicki and D. R. Nygren and A. Obertacke and S. Odrowski and A. Olivas and M. Olivo and A. O'Murchadha and S. Panknin and L. Paul and J. A. Pepper and C. Pérez de los Heros and D. Pieloth and N. Pirk and J. Posselt and P. B. Price and G. T. Przybylski and L. Rädel and K. Rawlins and P. Redl and E. Resconi and W. Rhode and M. Ribordy and M. Richman and B. Riedel and J. P. Rodrigues and F. Rothmaier and C. Rott and T. Ruhe and B. Ruzybayev and D. Ryckbosch and S. M. Saba and T. Salameh and H. -G. Sander and M. Santander and S. Sarkar and K. Schatto and M. Scheel and F. Scheriau and T. Schmidt and M. Schmitz and S. Schoenen and S. Schöneberg and L. Schönherr and A. Schönwald and A. Schukraft and L. Schulte and O. Schulz and D. Seckel and S. H. Seo and Y. Sestayo and S. Seunarine and C. Sheremata and M. W. E. Smith and M. Soiron and D. Soldin and G. M. Spiczak and C. Spiering and M. Stamatikos and T. Stanev and A. Stasik and T. Stezelberger and R. G. Stokstad and A. Stößl and E. A. Strahler and R. Ström and G. W. Sullivan and H. Taavola and I. Taboada and A. Tamburro and S. Ter-Antonyan and S. Tilav and P. A. Toale and S. Toscano and M. Usner and D. va. de. Drift and N. va. Eijndhoven and A. Va. Overloop and J. va. Santen and M. Vehring and M. Voge and M. Vraeghe and C. Walck and T. Waldenmaier and M. Wallraff and M. Walter and R. Wasserman and Ch. Weaver and C. Wendt and S. Westerhoff and N. Whitehorn and K. Wiebe and C. H. Wiebusch and D. R. Williams and H. Wissing and M. Wolf and T. R. Wood and K. Woschnagg and C. Xu and D. L. Xu and X. W. Xu and J. P. Yanez and G. Yodh and S. Yoshida and P. Zarzhitsky and J. Ziemann and S. Zierke and A. Zilles and M. Zoll},
journal= {arXiv preprint arXiv:1210.5278},
year = {2013}
}
备注
Accepted for publication in ApJ. Supplemental information available in the source file of the paper