Inferred Cosmic-Ray Spectrum from Fermi Large Area Telescope gamma-Ray Observations of Earth's Limb
- 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
- de Angelis A
- de Palma F
- Dermer CD
- Digel SW
- Di Venere L
- Silva EDE
- 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
- Johannesson G
- Johnson AS
- Kamae T
- Kawano T
- Knodlseder 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
- Raino S
- Rando R
- Razzano M
- Razzaque S
- Reimer A
- Reimer O
- Ritz S
- Roth M
- Schaal M
- Schulz A
- Sgro 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.
- D'AMMANDO, FILIPPO
DOIAbstract
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 gamma-ray emission from Earth's limb for an indirect measurement of the local spectrum of CR protons in the energy range similar to 90 GeV-6 TeV (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 spectr...
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