Observation of Anisotropy of TeV Cosmic Rays with Two Years of HAWC

Observation of Anisotropy of TeV Cosmic Rays with Two Years of HAWC
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DOI：
10.3847/1538-4357/aad90c
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发表时间：
2018-05
期刊：
The Astrophysical Journal
影响因子：
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通讯作者：
A. Abeysekara;R. Alfaro;C. Álvarez;J. Álvarez;R. Arceo;J. C. Arteaga-Vel'azquez;D. Rojas;H. Solares;A. Becerril;E. Belmont-Moreno;S. BenZvi;A. Bernal;J. Braun;K. Caballero-Mora;T. Capistrán;A. Carramiñana;S. Casanova;M. Castillo;U. Cotti;J. Cotzomi;C. D. Le'on;E. D. L. Fuente;R. Hernández;S. Dichiara;B. Dingus;M. DuVernois;J. C. Díaz-Vélez;K. Engel;D. Fiorino;N. Fraija;J. A. Garc'ia-Gonz'alez;F. Garfias;A. G. Muñoz;M. Gonz'alez;J. Goodman;Z. Hampel-Arias;J. P. Harding;S. Hernández;B. Hona;F. Hueyotl-Zahuantitla;C. Hui;P. Hüntemeyer;A. Iriarte;A. Jardin-Blicq;V. Joshi;S. Kaufmann;A. Lara;R. Lauer;W. Lee;H. L. Vargas;A. Longinotti;G. Luis-Raya;R. Luna-Garc'ia;D. L'opez-C'amara;R. L'opez-Coto;K. Malone;S. Marinelli;O. Martinez;I. Martinez-Castellanos;J. Mart'inez-Castro;H. Mart'inez-Huerta;J. Matthews;P. Miranda-Romagnoli;E. Moreno;M. Mostafá;A. Nayerhoda;L. Nellen;M. Newbold;M. Nisa;R. Noriega-Papaqui;R. Pelayo;J. Pretz;E. Pérez-Pérez-E.-Pérez-Pérez-1431205495;Z. Ren;C. Rho;C. Rivière;D. Rosa-Gonz'alez;M. Rosenberg;E. Ruiz-Velasco;F. Greus;A. Sandoval;M. Schneider;H. Schoorlemmer;M. Arroyo;G. Sinnis;A. Smith;R. Springer;P. Surajbali;I. Taboada;O. Tibolla;K. Tollefson;I. Torres;G. Vianello;L. Villaseñor;T. Weisgarber;F. Werner;S. Westerhoff;J. Wood;T. Yapici;A. Zepeda;H. Zhou
A. Abeysekara;R. Alfaro;C. Álvarez;J. Álvarez;R. Arceo;J. C. Arteaga-Vel'azquez;D. Rojas;H. Solares;A. Becerril;E. Belmont-Moreno;S. BenZvi;A. Bernal;J. Braun;K. Caballero-Mora;T. Capistrán;A. Carramiñana;S. Casanova;M. Castillo;U. Cotti;J. Cotzomi;C. D. Le'on;E. D. L. Fuente;R. Hernández;S. Dichiara;B. Dingus;M. DuVernois;J. C. Díaz-Vélez;K. Engel;D. Fiorino;N. Fraija;J. A. Garc'ia-Gonz'alez;F. Garfias;A. G. Muñoz;M. Gonz'alez;J. Goodman;Z. Hampel-Arias;J. P. Harding;S. Hernández;B. Hona;F. Hueyotl-Zahuantitla;C. Hui;P. Hüntemeyer;A. Iriarte;A. Jardin-Blicq;V. Joshi;S. Kaufmann;A. Lara;R. Lauer;W. Lee;H. L. Vargas;A. Longinotti;G. Luis-Raya;R. Luna-Garc'ia;D. L'opez-C'amara;R. L'opez-Coto;K. Malone;S. Marinelli;O. Martinez;I. Martinez-Castellanos;J. Mart'inez-Castro;H. Mart'inez-Huerta;J. Matthews;P. Miranda-Romagnoli;E. Moreno;M. Mostafá;A. Nayerhoda;L. Nellen;M. Newbold;M. Nisa;R. Noriega-Papaqui;R. Pelayo;J. Pretz;E. Pérez-Pérez-E.-Pérez-Pérez-1431205495;Z. Ren;C. Rho;C. Rivière;D. Rosa-Gonz'alez;M. Rosenberg;E. Ruiz-Velasco;F. Greus;A. Sandoval;M. Schneider;H. Schoorlemmer;M. Arroyo;G. Sinnis;A. Smith;R. Springer;P. Surajbali;I. Taboada;O. Tibolla;K. Tollefson;I. Torres;G. Vianello;L. Villaseñor;T. Weisgarber;F. Werner;S. Westerhoff;J. Wood;T. Yapici;A. Zepeda;H. Zhou
中科院分区：
其他
文献类型：
--
作者：
A. Abeysekara;R. Alfaro;C. Álvarez;J. Álvarez;R. Arceo;J. C. Arteaga-Vel'azquez;D. Rojas;H. Solares;A. Becerril;E. Belmont-Moreno;S. BenZvi;A. Bernal;J. Braun;K. Caballero-Mora;T. Capistrán;A. Carramiñana;S. Casanova;M. Castillo;U. Cotti;J. Cotzomi;C. D. Le'on;E. D. L. Fuente;R. Hernández;S. Dichiara;B. Dingus;M. DuVernois;J. C. Díaz-Vélez;K. Engel;D. Fiorino;N. Fraija;J. A. Garc'ia-Gonz'alez;F. Garfias;A. G. Muñoz;M. Gonz'alez;J. Goodman;Z. Hampel-Arias;J. P. Harding;S. Hernández;B. Hona;F. Hueyotl-Zahuantitla;C. Hui;P. Hüntemeyer;A. Iriarte;A. Jardin-Blicq;V. Joshi;S. Kaufmann;A. Lara;R. Lauer;W. Lee;H. L. Vargas;A. Longinotti;G. Luis-Raya;R. Luna-Garc'ia;D. L'opez-C'amara;R. L'opez-Coto;K. Malone;S. Marinelli;O. Martinez;I. Martinez-Castellanos;J. Mart'inez-Castro;H. Mart'inez-Huerta;J. Matthews;P. Miranda-Romagnoli;E. Moreno;M. Mostafá;A. Nayerhoda;L. Nellen;M. Newbold;M. Nisa;R. Noriega-Papaqui;R. Pelayo;J. Pretz;E. Pérez-Pérez-E.-Pérez-Pérez-1431205495;Z. Ren;C. Rho;C. Rivière;D. Rosa-Gonz'alez;M. Rosenberg;E. Ruiz-Velasco;F. Greus;A. Sandoval;M. Schneider;H. Schoorlemmer;M. Arroyo;G. Sinnis;A. Smith;R. Springer;P. Surajbali;I. Taboada;O. Tibolla;K. Tollefson;I. Torres;G. Vianello;L. Villaseñor;T. Weisgarber;F. Werner;S. Westerhoff;J. Wood;T. Yapici;A. Zepeda;H. Zhou

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经过两年的运行，高海拔水切伦科夫天文台(HAWC)分析了2.0至72.8TeV能量范围内的TeV宇宙射线天空。像北半球和南半球的其他探测器一样，HAWC观测到宇宙射线到达方向分布的能量依赖的各向异性。这种各向异性是由相对强度从2 TeV时的8×10−4缓慢增加到30 TeV附近的14×10−4的偶极矩控制的，其相位在R.A.TeV为40°，振幅从8×10 TeV缓慢增加到14×10 TeV，超过这个值后，偶极强度下降。在四极矩和八极矩中也观察到了显著的大尺度(角度范围为&gt；60°)信号，并且还存在显著的小尺度特征，其位置和形状与先前的观测一致。与以前在这个能量范围内的测量相比，HAWC宇宙线天图在能量分辨率和各向异性的拟合精度上都有所提高。这些数据可以用来更好地约束本地宇宙线加速器和中间的磁场。
After two years of operation, the High-Altitude Water Cherenkov (HAWC) Observatory has analyzed the TeV cosmic-ray sky over an energy range between 2.0 and 72.8 TeV. Like other detectors in the northern and southern hemispheres, HAWC observes an energy-dependent anisotropy in the arrival direction distribution of cosmic rays. This anisotropy is dominated by a dipole moment with phase in R.A. α ≈ 40° and amplitude that slowly rises in relative intensity from 8 × 10−4 at 2 TeV to 14 × 10−4 around 30 TeV, above which the dipole decreases in strength. A significant large-scale (>60° in angular extent) signal is also observed in the quadrupole and octupole moments, and significant small-scale features are also present, with locations and shapes consistent with previous observations. Compared to previous measurements in this energy range, the HAWC cosmic-ray sky maps improve on the energy resolution and fit precision of the anisotropy. These data can be used in an effort to better constrain local cosmic-ray accelerators and the intervening magnetic fields.