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; T. Kawano; J. Knödlseder; M. Kuss; J. Lande; S. Larsson; L. Latronico; F. Longo; F. Loparco; M. N. Lovellette; P. Lubrano; M. Mayer; M. N. Mazziotta; J. E. McEnery; J. Mehault; P. F. Michelson; W. Mitthumsiri; T. Mizuno; A. A. Moiseev; C. Monte; M. E. Monzani; A. Morselli; I. V. Moskalenko; S. Murgia; R. Nemmen; E. Nuss; T. Ohsugi; A. Okumura; M. Orienti; E. Orlando; J. F. Ormes; D. Paneque; J. H. Panetta; J. S. Perkins; M. Pesce-Rollins; F. Piron; G. Pivato; T. A. Porter; S. Rainò; R. Rando; M. Razzano; S. Razzaque; A. Reimer; O. Reimer; S. Ritz; M. Roth; M. Schaal; A. Schulz; C. Sgrò; E. J. Siskind; G. Spandre; P. Spinelli; A. W. Strong; H. Takahashi; Y. Takeuchi; J. G. Thayer; J. B. Thayer; D. J. Thompson; L. Tibaldo; M. Tinivella; D. F. Torres; G. Tosti; E. Troja; V. Tronconi; T. L. Usher; J. Vandenbroucke; V. Vasileiou; G. Vianello; V. Vitale; M. Werner; B. L. Winer; K. S. Wood; M. Wood; Z. Yang

doi:10.1103/PhysRevLett.112.151103

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, T. Kawano, J. Knödlseder, M. Kuss, J. Lande, S. Larsson, L. Latronico, F. Longo, F. Loparco, M. N. Lovellette, P. Lubrano, M. Mayer, M. N. Mazziotta, J. E. McEnery, J. Mehault, P. F. Michelson, W. Mitthumsiri, T. Mizuno, A. A. Moiseev, C. Monte, M. E. Monzani, A. Morselli, I. V. Moskalenko, S. Murgia, R. Nemmen, E. Nuss, T. Ohsugi, A. Okumura, M. Orienti, E. Orlando, J. F. Ormes, D. Paneque, J. H. Panetta, J. S. Perkins, M. Pesce-Rollins, F. Piron, G. Pivato, T. A. Porter, S. Rainò, R. Rando, M. Razzano, S. Razzaque, A. Reimer, O. Reimer, S. Ritz, M. Roth, M. Schaal, A. Schulz, C. Sgrò, E. J. Siskind, G. Spandre, P. Spinelli, A. W. Strong, H. Takahashi, Y. Takeuchi, J. G. Thayer, J. B. Thayer, D. J. Thompson, L. Tibaldo, M. Tinivella, D. F. Torres, G. Tosti, E. Troja, V. Tronconi, T. L. Usher, J. Vandenbroucke, V. Vasileiou, G. Vianello, V. Vitale, M. Werner, B. L. Winer, K. S. Wood, M. Wood, Z. Yang

Physics

Research output: Contribution to journal › Article › peer-review

34 Citations (Scopus)

Abstract

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.

Original language	English
Article number	151103
Journal	Physical Review Letters
Volume	112
Issue number	15
DOIs	https://doi.org/10.1103/PhysRevLett.112.151103
Publication status	Published - 17 Apr 2014

ASJC Scopus subject areas

General Physics and Astronomy

Access to Document

10.1103/PhysRevLett.112.151103

Cite this

Ackermann, M., Ajello, M., Albert, A., Allafort, A., Baldini, L., Barbiellini, G., Bastieri, D., Bechtol, K., Bellazzini, R., Blandford, R. D., Bloom, E. D., Bonamente, E., Bottacini, E., Bouvier, A., Brandt, T. J., Brigida, M., Bruel, P., Buehler, R., Buson, S., ... Yang, Z. (2014). Inferred cosmic-ray spectrum from fermi large area telescope -Ray Observations of Eartha's Limb. Physical Review Letters, 112(15), Article 151103. https://doi.org/10.1103/PhysRevLett.112.151103

@article{9b131d0ef71441cd9af868b76e949bd8,

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

abstract = "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.",

author = "M. Ackermann and M. Ajello and A. Albert and A. Allafort and L. Baldini and G. Barbiellini and D. Bastieri and K. Bechtol and R. Bellazzini and Blandford, \{R. D.\} and Bloom, \{E. D.\} and E. Bonamente and E. Bottacini and A. Bouvier and Brandt, \{T. J.\} and M. Brigida and P. Bruel and R. Buehler and S. Buson and Caliandro, \{G. A.\} and Cameron, \{R. A.\} and Caraveo, \{P. A.\} and C. Cecchi and E. Charles and Chaves, \{R. C.G.\} and A. Chekhtman and J. Chiang and G. Chiaro and S. Ciprini and R. Claus and J. Cohen-Tanugi and J. Conrad and S. Cutini and M. Dalton and F. Dammando and \{De Angelis\}, A. and \{De Palma\}, F. and Dermer, \{C. D.\} and Digel, \{S. W.\} and \{Di Venere\}, L. and \{Do Couto E Silva\}, E. and Drell, \{P. S.\} and A. Drlica-Wagner and C. Favuzzi and Fegan, \{S. J.\} and Ferrara, \{E. C.\} and Focke, \{W. B.\} and A. Franckowiak and Y. Fukazawa and S. Funk and P. Fusco and F. Gargano and D. Gasparrini and S. Germani and N. Giglietto and F. Giordano and M. Giroletti and T. Glanzman and G. Godfrey and Gomez-Vargas, \{G. A.\} and Grenier, \{I. A.\} and Grove, \{J. E.\} and S. Guiriec and M. Gustafsson and D. Hadasch and Y. Hanabata and Harding, \{A. K.\} and M. Hayashida and K. Hayashi and Hewitt, \{J. W.\} and D. Horan and X. Hou and Hughes, \{R. E.\} and Y. Inoue and Jackson, \{M. S.\} and T. Jogler and G. J{\'o}hannesson and Johnson, \{A. S.\} and T. Kamae and T. Kawano and J. Kn{\"o}dlseder and M. Kuss and J. Lande and S. Larsson and L. Latronico and F. Longo and F. Loparco and Lovellette, \{M. N.\} and P. Lubrano and M. Mayer and Mazziotta, \{M. N.\} and McEnery, \{J. E.\} and J. Mehault and Michelson, \{P. F.\} and W. Mitthumsiri and T. Mizuno and Moiseev, \{A. A.\} and C. Monte and Monzani, \{M. E.\} and A. Morselli and Moskalenko, \{I. V.\} and S. Murgia and R. Nemmen and E. Nuss and T. Ohsugi and A. Okumura and M. Orienti and E. Orlando and Ormes, \{J. F.\} and D. Paneque and Panetta, \{J. H.\} and Perkins, \{J. S.\} and M. Pesce-Rollins and F. Piron and G. Pivato and Porter, \{T. A.\} and S. Rain{\`o} and R. Rando and M. Razzano and S. Razzaque and A. Reimer and O. Reimer and S. Ritz and M. Roth and M. Schaal and A. Schulz and C. Sgr{\`o} and Siskind, \{E. J.\} and G. Spandre and P. Spinelli and Strong, \{A. W.\} and H. Takahashi and Y. Takeuchi and Thayer, \{J. G.\} and Thayer, \{J. B.\} and Thompson, \{D. J.\} and L. Tibaldo and M. Tinivella and Torres, \{D. F.\} and G. Tosti and E. Troja and V. Tronconi and Usher, \{T. L.\} and J. Vandenbroucke and V. Vasileiou and G. Vianello and V. Vitale and M. Werner and Winer, \{B. L.\} and Wood, \{K. S.\} and M. Wood and Z. Yang",

year = "2014",

month = apr,

day = "17",

doi = "10.1103/PhysRevLett.112.151103",

language = "English",

volume = "112",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "15",

}

Ackermann, M, Ajello, M, Albert, A, Allafort, A, Baldini, L, Barbiellini, G, Bastieri, D, Bechtol, K, Bellazzini, R, Blandford, RD, Bloom, ED, Bonamente, E, Bottacini, E, Bouvier, A, Brandt, TJ, Brigida, M, Bruel, P, Buehler, R, Buson, S, Caliandro, GA, Cameron, RA, Caraveo, PA, Cecchi, C, Charles, E, Chaves, RCG, Chekhtman, A, Chiang, J, Chiaro, G, Ciprini, S, Claus, R, Cohen-Tanugi, J, Conrad, J, Cutini, S, Dalton, M, Dammando, F, De Angelis, A, De Palma, F, Dermer, CD, Digel, SW, Di Venere, L, Do Couto E Silva, E, Drell, PS, Drlica-Wagner, A, Favuzzi, C, Fegan, SJ, Ferrara, EC, Focke, WB, Franckowiak, A, Fukazawa, Y, Funk, S, Fusco, P, Gargano, F, Gasparrini, D, Germani, S, Giglietto, N, Giordano, F, Giroletti, M, Glanzman, T, Godfrey, G, Gomez-Vargas, GA, Grenier, IA, Grove, JE, Guiriec, S, Gustafsson, M, Hadasch, D, Hanabata, Y, Harding, AK, Hayashida, M, Hayashi, K, Hewitt, JW, Horan, D, Hou, X, Hughes, RE, Inoue, Y, Jackson, MS, Jogler, T, Jóhannesson, G, Johnson, AS, Kamae, T, Kawano, T, Knödlseder, J, Kuss, M, Lande, J, Larsson, S, Latronico, L, Longo, F, Loparco, F, Lovellette, MN, Lubrano, P, Mayer, M, Mazziotta, MN, McEnery, JE, Mehault, J, Michelson, PF, Mitthumsiri, W, Mizuno, T, Moiseev, AA, Monte, C, Monzani, ME, Morselli, A, Moskalenko, IV, Murgia, S, Nemmen, R, Nuss, E, Ohsugi, T, Okumura, A, Orienti, M, Orlando, E, Ormes, JF, Paneque, D, Panetta, JH, Perkins, JS, Pesce-Rollins, M, Piron, F, Pivato, G, Porter, TA, Rainò, S, Rando, R, Razzano, M, Razzaque, S, Reimer, A, Reimer, O, Ritz, S, Roth, M, Schaal, M, Schulz, A, Sgrò, C, Siskind, EJ, Spandre, G, Spinelli, P, Strong, AW, Takahashi, H, Takeuchi, Y, Thayer, JG, Thayer, JB, Thompson, DJ, Tibaldo, L, Tinivella, M, Torres, DF, Tosti, G, Troja, E, Tronconi, V, Usher, TL, Vandenbroucke, J, Vasileiou, V, Vianello, G, Vitale, V, Werner, M, Winer, BL, Wood, KS, Wood, M & Yang, Z 2014, 'Inferred cosmic-ray spectrum from fermi large area telescope -Ray Observations of Eartha's Limb', Physical Review Letters, vol. 112, no. 15, 151103. https://doi.org/10.1103/PhysRevLett.112.151103

TY - JOUR

T1 - Inferred cosmic-ray spectrum from fermi large area telescope -Ray Observations of Eartha's Limb

AU - Ackermann, M.

AU - Ajello, M.

AU - Albert, A.

AU - Allafort, A.

AU - Baldini, L.

AU - Barbiellini, G.

AU - Bastieri, D.

AU - Bechtol, K.

AU - Bellazzini, R.

AU - Blandford, R. D.

AU - Bloom, E. D.

AU - Bonamente, E.

AU - Bottacini, E.

AU - Bouvier, A.

AU - Brandt, T. J.

AU - Brigida, M.

AU - Bruel, P.

AU - Buehler, R.

AU - Buson, S.

AU - Caliandro, G. A.

AU - Cameron, R. A.

AU - Caraveo, P. A.

AU - Cecchi, C.

AU - Charles, E.

AU - Chaves, R. C.G.

AU - Chekhtman, A.

AU - Chiang, J.

AU - Chiaro, G.

AU - Ciprini, S.

AU - Claus, R.

AU - Cohen-Tanugi, J.

AU - Conrad, J.

AU - Cutini, S.

AU - Dalton, M.

AU - Dammando, F.

AU - De Angelis, A.

AU - De Palma, F.

AU - Dermer, C. D.

AU - Digel, S. W.

AU - Di Venere, L.

AU - Do Couto E Silva, E.

AU - Drell, P. S.

AU - Drlica-Wagner, A.

AU - Favuzzi, C.

AU - Fegan, S. J.

AU - Ferrara, E. C.

AU - Focke, W. B.

AU - Franckowiak, A.

AU - Fukazawa, Y.

AU - Funk, S.

AU - Fusco, P.

AU - Gargano, F.

AU - Gasparrini, D.

AU - Germani, S.

AU - Giglietto, N.

AU - Giordano, F.

AU - Giroletti, M.

AU - Glanzman, T.

AU - Godfrey, G.

AU - Gomez-Vargas, G. A.

AU - Grenier, I. A.

AU - Grove, J. E.

AU - Guiriec, S.

AU - Gustafsson, M.

AU - Hadasch, D.

AU - Hanabata, Y.

AU - Harding, A. K.

AU - Hayashida, M.

AU - Hayashi, K.

AU - Hewitt, J. W.

AU - Horan, D.

AU - Hou, X.

AU - Hughes, R. E.

AU - Inoue, Y.

AU - Jackson, M. S.

AU - Jogler, T.

AU - Jóhannesson, G.

AU - Johnson, A. S.

AU - Kamae, T.

AU - Kawano, T.

AU - Knödlseder, J.

AU - Kuss, M.

AU - Lande, J.

AU - Larsson, S.

AU - Latronico, L.

AU - Longo, F.

AU - Loparco, F.

AU - Lovellette, M. N.

AU - Lubrano, P.

AU - Mayer, M.

AU - Mazziotta, M. N.

AU - McEnery, J. E.

AU - Mehault, J.

AU - Michelson, P. F.

AU - Mitthumsiri, W.

AU - Mizuno, T.

AU - Moiseev, A. A.

AU - Monte, C.

AU - Monzani, M. E.

AU - Morselli, A.

AU - Moskalenko, I. V.

AU - Murgia, S.

AU - Nemmen, R.

AU - Nuss, E.

AU - Ohsugi, T.

AU - Okumura, A.

AU - Orienti, M.

AU - Orlando, E.

AU - Ormes, J. F.

AU - Paneque, D.

AU - Panetta, J. H.

AU - Perkins, J. S.

AU - Pesce-Rollins, M.

AU - Piron, F.

AU - Pivato, G.

AU - Porter, T. A.

AU - Rainò, S.

AU - Rando, R.

AU - Razzano, M.

AU - Razzaque, S.

AU - Reimer, A.

AU - Reimer, O.

AU - Ritz, S.

AU - Roth, M.

AU - Schaal, M.

AU - Schulz, A.

AU - Sgrò, C.

AU - Siskind, E. J.

AU - Spandre, G.

AU - Spinelli, P.

AU - Strong, A. W.

AU - Takahashi, H.

AU - Takeuchi, Y.

AU - Thayer, J. G.

AU - Thayer, J. B.

AU - Thompson, D. J.

AU - Tibaldo, L.

AU - Tinivella, M.

AU - Torres, D. F.

AU - Tosti, G.

AU - Troja, E.

AU - Tronconi, V.

AU - Usher, T. L.

AU - Vandenbroucke, J.

AU - Vasileiou, V.

AU - Vianello, G.

AU - Vitale, V.

AU - Werner, M.

AU - Winer, B. L.

AU - Wood, K. S.

AU - Wood, M.

AU - Yang, Z.

PY - 2014/4/17

Y1 - 2014/4/17

N2 - 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.

AB - 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.

UR - https://www.scopus.com/pages/publications/84898959342

U2 - 10.1103/PhysRevLett.112.151103

DO - 10.1103/PhysRevLett.112.151103

M3 - Article

AN - SCOPUS:84898959342

SN - 0031-9007

VL - 112

JO - Physical Review Letters

JF - Physical Review Letters

IS - 15

M1 - 151103

ER -

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

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