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Direct Measurement of the Cosmic-Ray Proton Spectrum from 50 GeV to 10 TeV with the Calorimetric Electron Telescope on the International Space Station.
Adriani, O; Akaike, Y; Asano, K; Asaoka, Y; Bagliesi, M G; Berti, E; Bigongiari, G; Binns, W R; Bonechi, S; Bongi, M; Brogi, P; Bruno, A; Buckley, J H; Cannady, N; Castellini, G; Checchia, C; Cherry, M L; Collazuol, G; Di Felice, V; Ebisawa, K; Fuke, H; Guzik, T G; Hams, T; Hasebe, N; Hibino, K; Ichimura, M; Ioka, K; Ishizaki, W; Israel, M H; Kasahara, K; Kataoka, J; Kataoka, R; Katayose, Y; Kato, C; Kawanaka, N; Kawakubo, Y; Kohri, K; Krawczynski, H S; Krizmanic, J F; Lomtadze, T; Maestro, P; Marrocchesi, P S; Messineo, A M; Mitchell, J W; Miyake, S; Moiseev, A A; Mori, K; Mori, M; Mori, N; Motz, H M.
Afiliação
  • Adriani O; Department of Physics, University of Florence, Via Sansone, 1-50019 Sesto, Fiorentino, Italy.
  • Akaike Y; INFN Sezione di Florence, Via Sansone, 1-50019 Sesto, Fiorentino, Italy.
  • Asano K; Department of Physics, University of Maryland, Baltimore County, 1000 Hilltop Circle, Baltimore, Maryland 21250, USA.
  • Asaoka Y; Astroparticle Physics Laboratory, NASA/GSFC, Greenbelt, Maryland 20771, USA.
  • Bagliesi MG; Institute for Cosmic Ray Research, The University of Tokyo, 5-1-5 Kashiwa-no-Ha, Kashiwa, Chiba 277-8582, Japan.
  • Berti E; Waseda Research Institute for Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 169-8555, Japan.
  • Bigongiari G; JEM Utilization Center, Human Spaceflight Technology Directorate, Japan Aerospace Exploration Agency, 2-1-1 Sengen, Tsukuba, Ibaraki 305-8505, Japan.
  • Binns WR; Department of Physical Sciences, Earth and Environment, University of Siena, via Roma 56, 53100 Siena, Italy.
  • Bonechi S; INFN Sezione di Pisa, Polo Fibonacci, Largo B. Pontecorvo, 3-56127 Pisa, Italy.
  • Bongi M; Department of Physics, University of Florence, Via Sansone, 1-50019 Sesto, Fiorentino, Italy.
  • Brogi P; INFN Sezione di Florence, Via Sansone, 1-50019 Sesto, Fiorentino, Italy.
  • Bruno A; Department of Physical Sciences, Earth and Environment, University of Siena, via Roma 56, 53100 Siena, Italy.
  • Buckley JH; INFN Sezione di Pisa, Polo Fibonacci, Largo B. Pontecorvo, 3-56127 Pisa, Italy.
  • Cannady N; Department of Physics and McDonnell Center for the Space Sciences, Washington University, One Brookings Drive, St. Louis, Missouri 63130-4899, USA.
  • Castellini G; Department of Physical Sciences, Earth and Environment, University of Siena, via Roma 56, 53100 Siena, Italy.
  • Checchia C; INFN Sezione di Pisa, Polo Fibonacci, Largo B. Pontecorvo, 3-56127 Pisa, Italy.
  • Cherry ML; Department of Physics, University of Florence, Via Sansone, 1-50019 Sesto, Fiorentino, Italy.
  • Collazuol G; INFN Sezione di Florence, Via Sansone, 1-50019 Sesto, Fiorentino, Italy.
  • Di Felice V; Department of Physical Sciences, Earth and Environment, University of Siena, via Roma 56, 53100 Siena, Italy.
  • Ebisawa K; INFN Sezione di Pisa, Polo Fibonacci, Largo B. Pontecorvo, 3-56127 Pisa, Italy.
  • Fuke H; Heliospheric Physics Laboratory, NASA/GSFC, Greenbelt, Maryland 20771, USA.
  • Guzik TG; Department of Physics and McDonnell Center for the Space Sciences, Washington University, One Brookings Drive, St. Louis, Missouri 63130-4899, USA.
  • Hams T; Department of Physics and Astronomy, Louisiana State University, 202 Nicholson Hall, Baton Rouge, Louisiana 70803, USA.
  • Hasebe N; Institute of Applied Physics (IFAC), National Research Council (CNR), Via Madonna del Piano, 10, 50019 Sesto, Fiorentino, Italy.
  • Hibino K; Department of Physics and Astronomy, University of Padova, Via Marzolo, 8, 35131 Padova, Italy.
  • Ichimura M; INFN Sezione di Padova, Via Marzolo, 8, 35131 Padova, Italy.
  • Ioka K; Department of Physics and Astronomy, Louisiana State University, 202 Nicholson Hall, Baton Rouge, Louisiana 70803, USA.
  • Ishizaki W; Department of Physics and Astronomy, University of Padova, Via Marzolo, 8, 35131 Padova, Italy.
  • Israel MH; INFN Sezione di Padova, Via Marzolo, 8, 35131 Padova, Italy.
  • Kasahara K; University of Rome "Tor Vergata", Via della Ricerca Scientifica 1, 00133 Rome, Italy.
  • Kataoka J; INFN Sezione di Rome "Tor Vergata", Via della Ricerca Scientifica 1, 00133 Rome, Italy.
  • Kataoka R; Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Chuo, Sagamihara, Kanagawa 252-5210, Japan.
  • Katayose Y; Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Chuo, Sagamihara, Kanagawa 252-5210, Japan.
  • Kato C; Department of Physics and Astronomy, Louisiana State University, 202 Nicholson Hall, Baton Rouge, Louisiana 70803, USA.
  • Kawanaka N; Department of Physics, University of Maryland, Baltimore County, 1000 Hilltop Circle, Baltimore, Maryland 21250, USA.
  • Kawakubo Y; CRESST and Astroparticle Physics Laboratory NASA/GSFC, Greenbelt, Maryland 20771, USA.
  • Kohri K; Waseda Research Institute for Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 169-8555, Japan.
  • Krawczynski HS; Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa, Yokohama, Kanagawa 221-8686, Japan.
  • Krizmanic JF; Faculty of Science and Technology, Graduate School of Science and Technology, Hirosaki University, 3, Bunkyo, Hirosaki, Aomori 036-8561, Japan.
  • Lomtadze T; Yukawa Institute for Theoretical Physics, Kyoto University, Kitashirakawa Oiwakecho, Sakyo, Kyoto 606-8502, Japan.
  • Maestro P; Institute for Cosmic Ray Research, The University of Tokyo, 5-1-5 Kashiwa-no-Ha, Kashiwa, Chiba 277-8582, Japan.
  • Marrocchesi PS; Department of Physics and McDonnell Center for the Space Sciences, Washington University, One Brookings Drive, St. Louis, Missouri 63130-4899, USA.
  • Messineo AM; Waseda Research Institute for Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 169-8555, Japan.
  • Mitchell JW; Waseda Research Institute for Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 169-8555, Japan.
  • Miyake S; National Institute of Polar Research, 10-3, Midori-cho, Tachikawa, Tokyo 190-8518, Japan.
  • Moiseev AA; Faculty of Engineering, Division of Intelligent Systems Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya, Yokohama 240-8501, Japan.
  • Mori K; Faculty of Science, Shinshu University, 3-1-1 Asahi, Matsumoto, Nagano 390-8621, Japan.
  • Mori M; Hakubi Center, Kyoto University, Yoshida Honmachi, Sakyo-ku, Kyoto 606-8501, Japan.
  • Mori N; Department of Astronomy, Graduate School of Science, Kyoto University, Kitashirakawa Oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan.
  • Motz HM; Department of Physics and Astronomy, Louisiana State University, 202 Nicholson Hall, Baton Rouge, Louisiana 70803, USA.
Phys Rev Lett ; 122(18): 181102, 2019 May 10.
Article em En | MEDLINE | ID: mdl-31144869
ABSTRACT
In this paper, we present the analysis and results of a direct measurement of the cosmic-ray proton spectrum with the CALET instrument onboard the International Space Station, including the detailed assessment of systematic uncertainties. The observation period used in this analysis is from October 13, 2015 to August 31, 2018 (1054 days). We have achieved the very wide energy range necessary to carry out measurements of the spectrum from 50 GeV to 10 TeV covering, for the first time in space, with a single instrument the whole energy interval previously investigated in most cases in separate subranges by magnetic spectrometers (BESS-TeV, PAMELA, and AMS-02) and calorimetric instruments (ATIC, CREAM, and NUCLEON). The observed spectrum is consistent with AMS-02 but extends to nearly an order of magnitude higher energy, showing a very smooth transition of the power-law spectral index from -2.81±0.03 (50-500 GeV) neglecting solar modulation effects (or -2.87±0.06 including solar modulation effects in the lower energy region) to -2.56±0.04 (1-10 TeV), thereby confirming the existence of spectral hardening and providing evidence of a deviation from a single power law by more than 3σ.
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Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2019 Tipo de documento: Article País de afiliação: Itália
Texto completo
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Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2019 Tipo de documento: Article País de afiliação: Itália