Direct Measurement of the Cosmic-Ray Proton Spectrum from 50 GeV to 10 TeV with the Calorimetric Electron Telescope on the International Space Station.

Journal

Physical review letters
ISSN: 1079-7114
Titre abrégé: Phys Rev Lett
Pays: United States
ID NLM: 0401141

Informations de publication

Date de publication:
10 May 2019
Historique:
revised: 03 03 2019
received: 28 12 2018
entrez: 31 5 2019
pubmed: 31 5 2019
medline: 31 5 2019
Statut: ppublish

Résumé

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.

Identifiants

DOI: 10.1103/PhysRevLett.122.181102 PMID: 31144869
pubmed: 31144869
doi: 10.1103/PhysRevLett.122.181102
doi:

Types de publication

Journal Article

Langues

eng

Pagination

181102

Auteurs

O Adriani (O)

Department of Physics, University of Florence, Via Sansone, 1-50019 Sesto, Fiorentino, Italy.
INFN Sezione di Florence, Via Sansone, 1-50019 Sesto, Fiorentino, Italy.

Y Akaike (Y)

Department of Physics, University of Maryland, Baltimore County, 1000 Hilltop Circle, Baltimore, Maryland 21250, USA.
Astroparticle Physics Laboratory, NASA/GSFC, Greenbelt, Maryland 20771, USA.

K Asano (K)

Institute for Cosmic Ray Research, The University of Tokyo, 5-1-5 Kashiwa-no-Ha, Kashiwa, Chiba 277-8582, Japan.

Y Asaoka (Y)

Waseda Research Institute for Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 169-8555, Japan.
JEM Utilization Center, Human Spaceflight Technology Directorate, Japan Aerospace Exploration Agency, 2-1-1 Sengen, Tsukuba, Ibaraki 305-8505, Japan.

M G Bagliesi (MG)

Department of Physical Sciences, Earth and Environment, University of Siena, via Roma 56, 53100 Siena, Italy.
INFN Sezione di Pisa, Polo Fibonacci, Largo B. Pontecorvo, 3-56127 Pisa, Italy.

E Berti (E)

Department of Physics, University of Florence, Via Sansone, 1-50019 Sesto, Fiorentino, Italy.
INFN Sezione di Florence, Via Sansone, 1-50019 Sesto, Fiorentino, Italy.

G Bigongiari (G)

Department of Physical Sciences, Earth and Environment, University of Siena, via Roma 56, 53100 Siena, Italy.
INFN Sezione di Pisa, Polo Fibonacci, Largo B. Pontecorvo, 3-56127 Pisa, Italy.

W R Binns (WR)

Department of Physics and McDonnell Center for the Space Sciences, Washington University, One Brookings Drive, St. Louis, Missouri 63130-4899, USA.

S Bonechi (S)

Department of Physical Sciences, Earth and Environment, University of Siena, via Roma 56, 53100 Siena, Italy.
INFN Sezione di Pisa, Polo Fibonacci, Largo B. Pontecorvo, 3-56127 Pisa, Italy.

M Bongi (M)

Department of Physics, University of Florence, Via Sansone, 1-50019 Sesto, Fiorentino, Italy.
INFN Sezione di Florence, Via Sansone, 1-50019 Sesto, Fiorentino, Italy.

P Brogi (P)

Department of Physical Sciences, Earth and Environment, University of Siena, via Roma 56, 53100 Siena, Italy.
INFN Sezione di Pisa, Polo Fibonacci, Largo B. Pontecorvo, 3-56127 Pisa, Italy.

A Bruno (A)

Heliospheric Physics Laboratory, NASA/GSFC, Greenbelt, Maryland 20771, USA.

J H Buckley (JH)

Department of Physics and McDonnell Center for the Space Sciences, Washington University, One Brookings Drive, St. Louis, Missouri 63130-4899, USA.

N Cannady (N)

Department of Physics and Astronomy, Louisiana State University, 202 Nicholson Hall, Baton Rouge, Louisiana 70803, USA.

G Castellini (G)

Institute of Applied Physics (IFAC), National Research Council (CNR), Via Madonna del Piano, 10, 50019 Sesto, Fiorentino, Italy.

C Checchia (C)

Department of Physics and Astronomy, University of Padova, Via Marzolo, 8, 35131 Padova, Italy.
INFN Sezione di Padova, Via Marzolo, 8, 35131 Padova, Italy.

M L Cherry (ML)

Department of Physics and Astronomy, Louisiana State University, 202 Nicholson Hall, Baton Rouge, Louisiana 70803, USA.

G Collazuol (G)

Department of Physics and Astronomy, University of Padova, Via Marzolo, 8, 35131 Padova, Italy.
INFN Sezione di Padova, Via Marzolo, 8, 35131 Padova, Italy.

V Di Felice (V)

University of Rome "Tor Vergata", Via della Ricerca Scientifica 1, 00133 Rome, Italy.
INFN Sezione di Rome "Tor Vergata", Via della Ricerca Scientifica 1, 00133 Rome, Italy.

K Ebisawa (K)

Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Chuo, Sagamihara, Kanagawa 252-5210, Japan.

H Fuke (H)

Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Chuo, Sagamihara, Kanagawa 252-5210, Japan.

T G Guzik (TG)

Department of Physics and Astronomy, Louisiana State University, 202 Nicholson Hall, Baton Rouge, Louisiana 70803, USA.

T Hams (T)

Department of Physics, University of Maryland, Baltimore County, 1000 Hilltop Circle, Baltimore, Maryland 21250, USA.
CRESST and Astroparticle Physics Laboratory NASA/GSFC, Greenbelt, Maryland 20771, USA.

N Hasebe (N)

Waseda Research Institute for Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 169-8555, Japan.

K Hibino (K)

Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa, Yokohama, Kanagawa 221-8686, Japan.

M Ichimura (M)

Faculty of Science and Technology, Graduate School of Science and Technology, Hirosaki University, 3, Bunkyo, Hirosaki, Aomori 036-8561, Japan.

K Ioka (K)

Yukawa Institute for Theoretical Physics, Kyoto University, Kitashirakawa Oiwakecho, Sakyo, Kyoto 606-8502, Japan.

W Ishizaki (W)

Institute for Cosmic Ray Research, The University of Tokyo, 5-1-5 Kashiwa-no-Ha, Kashiwa, Chiba 277-8582, Japan.

M H Israel (MH)

Department of Physics and McDonnell Center for the Space Sciences, Washington University, One Brookings Drive, St. Louis, Missouri 63130-4899, USA.

K Kasahara (K)

Waseda Research Institute for Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 169-8555, Japan.

J Kataoka (J)

Waseda Research Institute for Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 169-8555, Japan.

R Kataoka (R)

National Institute of Polar Research, 10-3, Midori-cho, Tachikawa, Tokyo 190-8518, Japan.

Y Katayose (Y)

Faculty of Engineering, Division of Intelligent Systems Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya, Yokohama 240-8501, Japan.

C Kato (C)

Faculty of Science, Shinshu University, 3-1-1 Asahi, Matsumoto, Nagano 390-8621, Japan.

N Kawanaka (N)

Hakubi Center, Kyoto University, Yoshida Honmachi, Sakyo-ku, Kyoto 606-8501, Japan.
Department of Astronomy, Graduate School of Science, Kyoto University, Kitashirakawa Oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan.

Y Kawakubo (Y)

Department of Physics and Astronomy, Louisiana State University, 202 Nicholson Hall, Baton Rouge, Louisiana 70803, USA.
College of Science and Engineering, Department of Physics and Mathematics, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo, Sagamihara, Kanagawa 252-5258, Japan.

K Kohri (K)

Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization, 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan.

H S Krawczynski (HS)

Department of Physics and McDonnell Center for the Space Sciences, Washington University, One Brookings Drive, St. Louis, Missouri 63130-4899, USA.

J F Krizmanic (JF)

Department of Physics, University of Maryland, Baltimore County, 1000 Hilltop Circle, Baltimore, Maryland 21250, USA.
CRESST and Astroparticle Physics Laboratory NASA/GSFC, Greenbelt, Maryland 20771, USA.

T Lomtadze (T)

INFN Sezione di Pisa, Polo Fibonacci, Largo B. Pontecorvo, 3-56127 Pisa, Italy.

P Maestro (P)

Department of Physical Sciences, Earth and Environment, University of Siena, via Roma 56, 53100 Siena, Italy.
INFN Sezione di Pisa, Polo Fibonacci, Largo B. Pontecorvo, 3-56127 Pisa, Italy.

P S Marrocchesi (PS)

Department of Physical Sciences, Earth and Environment, University of Siena, via Roma 56, 53100 Siena, Italy.
INFN Sezione di Pisa, Polo Fibonacci, Largo B. Pontecorvo, 3-56127 Pisa, Italy.

A M Messineo (AM)

INFN Sezione di Pisa, Polo Fibonacci, Largo B. Pontecorvo, 3-56127 Pisa, Italy.
University of Pisa, Polo Fibonacci, Largo B. Pontecorvo, 3-56127 Pisa, Italy.

J W Mitchell (JW)

Astroparticle Physics Laboratory, NASA/GSFC, Greenbelt, Maryland 20771, USA.

S Miyake (S)

Department of Electrical and Electronic Systems Engineering, National Institute of Technology, Ibaraki College, 866 Nakane, Hitachinaka, Ibaraki 312-8508 Japan.

A A Moiseev (AA)

CRESST and Astroparticle Physics Laboratory NASA/GSFC, Greenbelt, Maryland 20771, USA.
Department of Astronomy, University of Maryland, College Park, Maryland 20742, USA.

K Mori (K)

Waseda Research Institute for Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 169-8555, Japan.
Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Chuo, Sagamihara, Kanagawa 252-5210, Japan.

M Mori (M)

Department of Physical Sciences, College of Science and Engineering, Ritsumeikan University, Shiga 525-8577, Japan.

N Mori (N)

INFN Sezione di Florence, Via Sansone, 1-50019 Sesto, Fiorentino, Italy.

H M Motz (HM)

Faculty of Science and Engineering, Global Center for Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 169-8555, Japan.

K Munakata (K)

Faculty of Science, Shinshu University, 3-1-1 Asahi, Matsumoto, Nagano 390-8621, Japan.

H Murakami (H)

Waseda Research Institute for Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 169-8555, Japan.

S Nakahira (S)

RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.

J Nishimura (J)

Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Chuo, Sagamihara, Kanagawa 252-5210, Japan.

G A de Nolfo (GA)

Heliospheric Physics Laboratory, NASA/GSFC, Greenbelt, Maryland 20771, USA.

S Okuno (S)

Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa, Yokohama, Kanagawa 221-8686, Japan.

J F Ormes (JF)

Department of Physics and Astronomy, University of Denver, Physics Building, Room 211, 2112 East Wesley Avenue, Denver, Colorado 80208-6900, USA.

S Ozawa (S)

Waseda Research Institute for Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 169-8555, Japan.

L Pacini (L)

Department of Physics, University of Florence, Via Sansone, 1-50019 Sesto, Fiorentino, Italy.
INFN Sezione di Florence, Via Sansone, 1-50019 Sesto, Fiorentino, Italy.
Institute of Applied Physics (IFAC), National Research Council (CNR), Via Madonna del Piano, 10, 50019 Sesto, Fiorentino, Italy.

F Palma (F)

University of Rome "Tor Vergata", Via della Ricerca Scientifica 1, 00133 Rome, Italy.
INFN Sezione di Rome "Tor Vergata", Via della Ricerca Scientifica 1, 00133 Rome, Italy.

P Papini (P)

INFN Sezione di Florence, Via Sansone, 1-50019 Sesto, Fiorentino, Italy.

A V Penacchioni (AV)

Department of Physical Sciences, Earth and Environment, University of Siena, via Roma 56, 53100 Siena, Italy.
ASI Science Data Center (ASDC), Via del Politecnico snc, 00133 Rome, Italy.

B F Rauch (BF)

Department of Physics and McDonnell Center for the Space Sciences, Washington University, One Brookings Drive, St. Louis, Missouri 63130-4899, USA.

S B Ricciarini (SB)

INFN Sezione di Florence, Via Sansone, 1-50019 Sesto, Fiorentino, Italy.
Institute of Applied Physics (IFAC), National Research Council (CNR), Via Madonna del Piano, 10, 50019 Sesto, Fiorentino, Italy.

K Sakai (K)

Department of Physics, University of Maryland, Baltimore County, 1000 Hilltop Circle, Baltimore, Maryland 21250, USA.
CRESST and Astroparticle Physics Laboratory NASA/GSFC, Greenbelt, Maryland 20771, USA.

T Sakamoto (T)

College of Science and Engineering, Department of Physics and Mathematics, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo, Sagamihara, Kanagawa 252-5258, Japan.

M Sasaki (M)

CRESST and Astroparticle Physics Laboratory NASA/GSFC, Greenbelt, Maryland 20771, USA.
Department of Astronomy, University of Maryland, College Park, Maryland 20742, USA.

Y Shimizu (Y)

Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa, Yokohama, Kanagawa 221-8686, Japan.

A Shiomi (A)

College of Industrial Technology, Nihon University, 1-2-1 Izumi, Narashino, Chiba 275-8575, Japan.

R Sparvoli (R)

University of Rome "Tor Vergata", Via della Ricerca Scientifica 1, 00133 Rome, Italy.
INFN Sezione di Rome "Tor Vergata", Via della Ricerca Scientifica 1, 00133 Rome, Italy.

P Spillantini (P)

Department of Physics, University of Florence, Via Sansone, 1-50019 Sesto, Fiorentino, Italy.

F Stolzi (F)

Department of Physical Sciences, Earth and Environment, University of Siena, via Roma 56, 53100 Siena, Italy.
INFN Sezione di Pisa, Polo Fibonacci, Largo B. Pontecorvo, 3-56127 Pisa, Italy.

J E Suh (JE)

Department of Physical Sciences, Earth and Environment, University of Siena, via Roma 56, 53100 Siena, Italy.
INFN Sezione di Pisa, Polo Fibonacci, Largo B. Pontecorvo, 3-56127 Pisa, Italy.

A Sulaj (A)

Department of Physical Sciences, Earth and Environment, University of Siena, via Roma 56, 53100 Siena, Italy.
INFN Sezione di Pisa, Polo Fibonacci, Largo B. Pontecorvo, 3-56127 Pisa, Italy.

I Takahashi (I)

Kavli Institute for the Physics and Mathematics of the Universe, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, 277-8583, Japan.

M Takayanagi (M)

Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Chuo, Sagamihara, Kanagawa 252-5210, Japan.

M Takita (M)

Institute for Cosmic Ray Research, The University of Tokyo, 5-1-5 Kashiwa-no-Ha, Kashiwa, Chiba 277-8582, Japan.

T Tamura (T)

Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa, Yokohama, Kanagawa 221-8686, Japan.

T Terasawa (T)

RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.

H Tomida (H)

Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Chuo, Sagamihara, Kanagawa 252-5210, Japan.

S Torii (S)

Waseda Research Institute for Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 169-8555, Japan.
School of Advanced Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 169-8555, Japan.

Y Tsunesada (Y)

Division of Mathematics and Physics, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi, Osaka 558-8585, Japan.

Y Uchihori (Y)

National Institutes for Quantum and Radiation Science and Technology, 4-9-1 Anagawa, Inage, Chiba 263-8555, Japan.

S Ueno (S)

Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Chuo, Sagamihara, Kanagawa 252-5210, Japan.

E Vannuccini (E)

INFN Sezione di Florence, Via Sansone, 1-50019 Sesto, Fiorentino, Italy.

J P Wefel (JP)

Department of Physics and Astronomy, Louisiana State University, 202 Nicholson Hall, Baton Rouge, Louisiana 70803, USA.

K Yamaoka (K)

Nagoya University, Furo, Chikusa, Nagoya 464-8601, Japan.

S Yanagita (S)

College of Science, Ibaraki University, 2-1-1 Bunkyo, Mito, Ibaraki 310-8512, Japan.

A Yoshida (A)

College of Science and Engineering, Department of Physics and Mathematics, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo, Sagamihara, Kanagawa 252-5258, Japan.

K Yoshida (K)

Department of Electronic Information Systems, Shibaura Institute of Technology, 307 Fukasaku, Minuma, Saitama 337-8570, Japan.

Classifications MeSH