Inferred cosmic-ray spectrum from fermi large area telescope -Ray Observations of Eartha's Limb

Recent accurate measurements of cosmic-ray (CR) species by ATIC-2, CREAM, and PAMELA reveal an unexpected hardening in the proton and He spectra above a few hundred GeV, a gradual softening of the spectra just below a few hundred GeV, and a harder spectrum of He compared to that of protons. These ne...

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Main Authors: M. Ackermann, M. Ajello, A. Albert, A. Allafort, L. Baldini, G. Barbiellini, D. Bastieri, K. Bechtol, R. Bellazzini, R. D. Blandford, E. D. Bloom, E. Bonamente, E. Bottacini, A. Bouvier, T. J. Brandt, M. Brigida, P. Bruel, R. Buehler, S. Buson, G. A. Caliandro, R. A. Cameron, P. A. Caraveo, C. Cecchi, E. Charles, R. C.G. Chaves, A. Chekhtman, J. Chiang, G. Chiaro, S. Ciprini, R. Claus, J. Cohen-Tanugi, J. Conrad, S. Cutini, M. Dalton, F. Dammando, A. De Angelis, F. De Palma, C. D. Dermer, S. W. Digel, L. Di Venere, E. Do Couto E Silva, P. S. Drell, A. Drlica-Wagner, C. Favuzzi, S. J. Fegan, E. C. Ferrara, W. B. Focke, A. Franckowiak, Y. Fukazawa, S. Funk, P. Fusco, F. Gargano, D. Gasparrini, S. Germani, N. Giglietto, F. Giordano, M. Giroletti, T. Glanzman, G. Godfrey, G. A. Gomez-Vargas, I. A. Grenier, J. E. Grove, S. Guiriec, M. Gustafsson, D. Hadasch, Y. Hanabata, A. K. Harding, M. Hayashida, K. Hayashi, J. W. Hewitt, D. Horan, X. Hou, R. E. Hughes, Y. Inoue, M. S. Jackson, T. Jogler, G. Jóhannesson, A. S. Johnson, T. Kamae
Other Authors: Deutsche Elektronen-Synchrotron
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Published: 2018
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spelling th-mahidol.349262018-11-09T10:13:56Z Inferred cosmic-ray spectrum from fermi large area telescope -Ray Observations of Eartha's Limb M. Ackermann M. Ajello A. Albert A. Allafort L. Baldini G. Barbiellini D. Bastieri K. Bechtol R. Bellazzini R. D. Blandford E. D. Bloom E. Bonamente E. Bottacini A. Bouvier T. J. Brandt M. Brigida P. Bruel R. Buehler S. Buson G. A. Caliandro R. A. Cameron P. A. Caraveo C. Cecchi E. Charles R. C.G. Chaves A. Chekhtman J. Chiang G. Chiaro S. Ciprini R. Claus J. Cohen-Tanugi J. Conrad S. Cutini M. Dalton F. Dammando A. De Angelis F. De Palma C. D. Dermer S. W. Digel L. Di Venere E. Do Couto E Silva P. S. Drell A. Drlica-Wagner C. Favuzzi S. J. Fegan E. C. Ferrara W. B. Focke A. Franckowiak Y. Fukazawa S. Funk P. Fusco F. Gargano D. Gasparrini S. Germani N. Giglietto F. Giordano M. Giroletti T. Glanzman G. Godfrey G. A. Gomez-Vargas I. A. Grenier J. E. Grove S. Guiriec M. Gustafsson D. Hadasch Y. Hanabata A. K. Harding M. Hayashida K. Hayashi J. W. Hewitt D. Horan X. Hou R. E. Hughes Y. Inoue M. S. Jackson T. Jogler G. Jóhannesson A. S. Johnson T. Kamae Deutsche Elektronen-Synchrotron Space Sciences Laboratory at UC Berkeley Kavli Institute for Particle Astrophysics and Cosmology Istituto Nazionale di Fisica Nucleare, Roma Universita degli Studi di Trieste Istituto Nazionale Di Fisica Nucleare, Sezione di Padova Universita degli Studi di Padova Universita degli Studi di Perugia Santa Cruz Institute for Particle Physics NASA Goddard Space Flight Center Politecnico di Bari Laboratoire Leprince-Ringuet Consorzio Interuniversitario per la Fisica Spaziale (CIFS) INAF Istituto di Astrofisica Spaziale e Fisica Cosmica, Milan Institut de Recherche sur les Lois Fondamentales de l'Univers George Mason University, Fairfax Campus Agenzia Spaziale Italiana Osservatorio Astronomico di Roma Laboratoire Univers et Particules de Montpellier Stockholms universitet Oskar Klein Centre for Cosmoparticle Physics Kungl. Vetenskapsakademien IN2P3 Institut National de Physique Nucleaire et de Physique des Particules Istituto Di Radioastronomia, Bologna Universita degli Studi di Udine Naval Research Laboratory Fermi National Accelerator Laboratory Hiroshima University Universidad Autonoma de Madrid Université libre de Bruxelles (ULB) Medizinische Universitat Innsbruck University of Tokyo JAXA Institute of Space and Astronautical Science Ohio State University The Royal Institute of Technology (KTH) University Science Institute Reykjavik CNRS Centre National de la Recherche Scientifique Universite de Toulouse University of Maryland Mahidol University Physics and Astronomy Recent accurate measurements of cosmic-ray (CR) species by ATIC-2, CREAM, and PAMELA reveal an unexpected hardening in the proton and He spectra above a few hundred GeV, a gradual softening of the spectra just below a few hundred GeV, and a harder spectrum of He compared to that of protons. These newly discovered features may offer a clue to the origin of high-energy CRs. We use the Fermi Large Area Telescope observations of the -ray emission from Earthas limb for an indirect measurement of the local spectrum of CR protons in the energy range 90GeV-6TeV (derived from a photon energy range 15 GeV-1 TeV). Our analysis shows that single power law and broken power law spectra fit the data equally well and yield a proton spectrum with index 2.68±0.04 and 2.61±0.08 above 200GeV, respectively. © 2014 American Physical Society. 2018-11-09T03:13:56Z 2018-11-09T03:13:56Z 2014-04-17 Article Physical Review Letters. Vol.112, No.15 (2014) 10.1103/PhysRevLett.112.151103 10797114 00319007 2-s2.0-84898959342 https://repository.li.mahidol.ac.th/handle/123456789/34926 Mahidol University SCOPUS https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84898959342&origin=inward
institution Mahidol University
building Mahidol University Library
continent Asia
country Thailand
Thailand
content_provider Mahidol University Library
collection Mahidol University Institutional Repository
topic Physics and Astronomy
spellingShingle Physics and Astronomy
M. Ackermann
M. Ajello
A. Albert
A. Allafort
L. Baldini
G. Barbiellini
D. Bastieri
K. Bechtol
R. Bellazzini
R. D. Blandford
E. D. Bloom
E. Bonamente
E. Bottacini
A. Bouvier
T. J. Brandt
M. Brigida
P. Bruel
R. Buehler
S. Buson
G. A. Caliandro
R. A. Cameron
P. A. Caraveo
C. Cecchi
E. Charles
R. C.G. Chaves
A. Chekhtman
J. Chiang
G. Chiaro
S. Ciprini
R. Claus
J. Cohen-Tanugi
J. Conrad
S. Cutini
M. Dalton
F. Dammando
A. De Angelis
F. De Palma
C. D. Dermer
S. W. Digel
L. Di Venere
E. Do Couto E Silva
P. S. Drell
A. Drlica-Wagner
C. Favuzzi
S. J. Fegan
E. C. Ferrara
W. B. Focke
A. Franckowiak
Y. Fukazawa
S. Funk
P. Fusco
F. Gargano
D. Gasparrini
S. Germani
N. Giglietto
F. Giordano
M. Giroletti
T. Glanzman
G. Godfrey
G. A. Gomez-Vargas
I. A. Grenier
J. E. Grove
S. Guiriec
M. Gustafsson
D. Hadasch
Y. Hanabata
A. K. Harding
M. Hayashida
K. Hayashi
J. W. Hewitt
D. Horan
X. Hou
R. E. Hughes
Y. Inoue
M. S. Jackson
T. Jogler
G. Jóhannesson
A. S. Johnson
T. Kamae
Inferred cosmic-ray spectrum from fermi large area telescope -Ray Observations of Eartha's Limb
description Recent accurate measurements of cosmic-ray (CR) species by ATIC-2, CREAM, and PAMELA reveal an unexpected hardening in the proton and He spectra above a few hundred GeV, a gradual softening of the spectra just below a few hundred GeV, and a harder spectrum of He compared to that of protons. These newly discovered features may offer a clue to the origin of high-energy CRs. We use the Fermi Large Area Telescope observations of the -ray emission from Earthas limb for an indirect measurement of the local spectrum of CR protons in the energy range 90GeV-6TeV (derived from a photon energy range 15 GeV-1 TeV). Our analysis shows that single power law and broken power law spectra fit the data equally well and yield a proton spectrum with index 2.68±0.04 and 2.61±0.08 above 200GeV, respectively. © 2014 American Physical Society.
author2 Deutsche Elektronen-Synchrotron
author_facet Deutsche Elektronen-Synchrotron
M. Ackermann
M. Ajello
A. Albert
A. Allafort
L. Baldini
G. Barbiellini
D. Bastieri
K. Bechtol
R. Bellazzini
R. D. Blandford
E. D. Bloom
E. Bonamente
E. Bottacini
A. Bouvier
T. J. Brandt
M. Brigida
P. Bruel
R. Buehler
S. Buson
G. A. Caliandro
R. A. Cameron
P. A. Caraveo
C. Cecchi
E. Charles
R. C.G. Chaves
A. Chekhtman
J. Chiang
G. Chiaro
S. Ciprini
R. Claus
J. Cohen-Tanugi
J. Conrad
S. Cutini
M. Dalton
F. Dammando
A. De Angelis
F. De Palma
C. D. Dermer
S. W. Digel
L. Di Venere
E. Do Couto E Silva
P. S. Drell
A. Drlica-Wagner
C. Favuzzi
S. J. Fegan
E. C. Ferrara
W. B. Focke
A. Franckowiak
Y. Fukazawa
S. Funk
P. Fusco
F. Gargano
D. Gasparrini
S. Germani
N. Giglietto
F. Giordano
M. Giroletti
T. Glanzman
G. Godfrey
G. A. Gomez-Vargas
I. A. Grenier
J. E. Grove
S. Guiriec
M. Gustafsson
D. Hadasch
Y. Hanabata
A. K. Harding
M. Hayashida
K. Hayashi
J. W. Hewitt
D. Horan
X. Hou
R. E. Hughes
Y. Inoue
M. S. Jackson
T. Jogler
G. Jóhannesson
A. S. Johnson
T. Kamae
format Article
author M. Ackermann
M. Ajello
A. Albert
A. Allafort
L. Baldini
G. Barbiellini
D. Bastieri
K. Bechtol
R. Bellazzini
R. D. Blandford
E. D. Bloom
E. Bonamente
E. Bottacini
A. Bouvier
T. J. Brandt
M. Brigida
P. Bruel
R. Buehler
S. Buson
G. A. Caliandro
R. A. Cameron
P. A. Caraveo
C. Cecchi
E. Charles
R. C.G. Chaves
A. Chekhtman
J. Chiang
G. Chiaro
S. Ciprini
R. Claus
J. Cohen-Tanugi
J. Conrad
S. Cutini
M. Dalton
F. Dammando
A. De Angelis
F. De Palma
C. D. Dermer
S. W. Digel
L. Di Venere
E. Do Couto E Silva
P. S. Drell
A. Drlica-Wagner
C. Favuzzi
S. J. Fegan
E. C. Ferrara
W. B. Focke
A. Franckowiak
Y. Fukazawa
S. Funk
P. Fusco
F. Gargano
D. Gasparrini
S. Germani
N. Giglietto
F. Giordano
M. Giroletti
T. Glanzman
G. Godfrey
G. A. Gomez-Vargas
I. A. Grenier
J. E. Grove
S. Guiriec
M. Gustafsson
D. Hadasch
Y. Hanabata
A. K. Harding
M. Hayashida
K. Hayashi
J. W. Hewitt
D. Horan
X. Hou
R. E. Hughes
Y. Inoue
M. S. Jackson
T. Jogler
G. Jóhannesson
A. S. Johnson
T. Kamae
author_sort M. Ackermann
title Inferred cosmic-ray spectrum from fermi large area telescope -Ray Observations of Eartha's Limb
title_short Inferred cosmic-ray spectrum from fermi large area telescope -Ray Observations of Eartha's Limb
title_full Inferred cosmic-ray spectrum from fermi large area telescope -Ray Observations of Eartha's Limb
title_fullStr Inferred cosmic-ray spectrum from fermi large area telescope -Ray Observations of Eartha's Limb
title_full_unstemmed Inferred cosmic-ray spectrum from fermi large area telescope -Ray Observations of Eartha's Limb
title_sort inferred cosmic-ray spectrum from fermi large area telescope -ray observations of eartha's limb
publishDate 2018
url https://repository.li.mahidol.ac.th/handle/123456789/34926
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