R. Alfaro , C. Alvarez , J.C. Arteaga-Velázquez , D. Avila Rojas , H.A. Ayala Solares , E. Belmont-Moreno , A. Bernal , K.S. Caballero-Mora , T. Capistrán , A. Carramiñana , S. Casanova , J. Cotzomi , S. Coutiño de León , E. De la Fuente , D. Depaoli , P. Desiati , N. Di Lalla , R. Diaz Hernandez , M.A. DuVernois , J.C. Díaz-Vélez , C. de León
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The all-particle spectrum was obtained from an unfolding analysis of 5.3 years of data collected with the High Altitude Water Cherenkov (HAWC) observatory for zenith angles smaller than or equal to 35°. The study was carried out in the framework of the QGSJET-II-04 hadronic interaction model. The measured spectrum confirms the presence of a knee-like feature at tens of TeV. In our analysis, the position of this softening is found at <span><math><mrow><mn>40</mn><mo>.</mo><mn>2</mn><mo>±</mo><mn>1</mn><mo>.</mo><mn>0</mn></mrow></math></span>(stat.)<span><math><msubsup><mrow></mrow><mrow><mo>−</mo><mn>6</mn><mo>.</mo><mn>4</mn></mrow><mrow><mo>+</mo><mn>6</mn><mo>.</mo><mn>2</mn></mrow></msubsup></math></span>(sys.)<span><math><mrow><mspace></mspace><mspace></mspace><mi>TeV</mi></mrow></math></span>. The measured spectral indices before and after the break are <span><math><mrow><msub><mrow><mi>γ</mi></mrow><mrow><mn>1</mn></mrow></msub><mo>=</mo><mo>−</mo><mn>2</mn><mo>.</mo><mn>53</mn><mspace></mspace><mo>±</mo><mspace></mspace><mn>0</mn><mo>.</mo><mn>01</mn></mrow></math></span>(stat.)<span><math><msubsup><mrow></mrow><mrow><mo>−</mo><mn>0</mn><mo>.</mo><mn>05</mn></mrow><mrow><mo>+</mo><mn>0</mn><mo>.</mo><mn>04</mn></mrow></msubsup></math></span>(sys.) and <span><math><mrow><msub><mrow><mi>γ</mi></mrow><mrow><mn>2</mn></mrow></msub><mo>=</mo><mo>−</mo><mn>2</mn><mo>.</mo><mn>71</mn><mspace></mspace><mo>±</mo><mspace></mspace><mn>0</mn><mo>.</mo><mn>01</mn></mrow></math></span>(stat.)<span><math><msubsup><mrow></mrow><mrow><mo>−</mo><mn>0</mn><mo>.</mo><mn>04</mn></mrow><mrow><mo>+</mo><mn>0</mn><mo>.</mo><mn>03</mn></mrow></msubsup></math></span>(sys.), respectively.</div></div>","PeriodicalId":55439,"journal":{"name":"Astroparticle Physics","volume":"167 ","pages":"Article 103077"},"PeriodicalIF":4.2000,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"A measurement of the all-particle energy spectrum of cosmic rays from 1013 to 1015eV using HAWC\",\"authors\":\"R. 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引用次数: 0
摘要
我们报道了宇宙射线在10TeV至1PeV能量区间的总能谱,该能量区间位于直接和间接宇宙射线实验重叠的能量区域。全粒子谱是对高海拔切伦科夫(HAWC)天文台收集的天顶角小于或等于35°的5.3年数据进行展开分析得到的。本研究是在qgsjt - ii -04强子相互作用模型框架下进行的。测量的光谱证实了在数十TeV处存在膝状特征。在我们的分析中,这种软化的位置是在40.2±1.0(stat.)−6.4+6.2(sys.)TeV。测得断裂前后的光谱指数分别为γ1=−2.53±0.01(stat.)−0.05+0.04(sys.)和γ2=−2.71±0.01(stat.)−0.04+0.03(sys.)。
A measurement of the all-particle energy spectrum of cosmic rays from 1013 to 1015eV using HAWC
We report the total energy spectrum of cosmic rays in the energy interval from to , which lies in the energy region where both direct and indirect cosmic ray experiments overlap. The all-particle spectrum was obtained from an unfolding analysis of 5.3 years of data collected with the High Altitude Water Cherenkov (HAWC) observatory for zenith angles smaller than or equal to 35°. The study was carried out in the framework of the QGSJET-II-04 hadronic interaction model. The measured spectrum confirms the presence of a knee-like feature at tens of TeV. In our analysis, the position of this softening is found at (stat.)(sys.). The measured spectral indices before and after the break are (stat.)(sys.) and (stat.)(sys.), respectively.
期刊介绍:
Astroparticle Physics publishes experimental and theoretical research papers in the interacting fields of Cosmic Ray Physics, Astronomy and Astrophysics, Cosmology and Particle Physics focusing on new developments in the following areas: High-energy cosmic-ray physics and astrophysics; Particle cosmology; Particle astrophysics; Related astrophysics: supernova, AGN, cosmic abundances, dark matter etc.; Gravitational waves; High-energy, VHE and UHE gamma-ray astronomy; High- and low-energy neutrino astronomy; Instrumentation and detector developments related to the above-mentioned fields.