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Journal Articles The Astrophysical Journal Year : 2009

Fermi LAT Observation of Diffuse Gamma-Rays Produced Through Interactions between Local Interstellar Matter and High Energy Cosmic Rays

Aous A. Abdo , Markus Ackermann , Marco Ajello , W. B. Atwood , Magnus Axelsson , Luca Baldini , Jean Ballet (1) , Guido Barbiellini , D. Bastieri , B.M. Baughmann , K. Bechtol , R. Bellazzini , B. Berenji , E.D. Bloom , E. Bonamente , A.W. Borgland , J. Bregeon , A. Brez , M. Brigida , Pascal Bruel (2) , T.H. Burnett , G. A. Caliandro , R. A. Cameron , P. A. Caraveo , P. Carlson , J.M. Casandjian (1) , C. Cecchi , O. Celik , A. Chekhtman , C.C. Cheung , S. Ciprini , R. Claus , J. Cohen-Tanugi (3) , J. Conrad , S. Cutini , C.D. Dermer , A. de Angelis , F. de Palma , S.W. Digel , E. Do Couto E Silva , P.S. Drell , R. Dubois , D. Dumora (4) , C. Farnier (3) , C. Favuzzi , S.J. Fegan (2) , W.B. Focke , M. Frailis , Y. Fukazawa , S. Funk , P. Fusco , F. Gargano , D. Gasparrini , N. Gehrels , S. Germani , B. Giebels (2) , N. Giglietto , F. Giordano , T. Glanzman , G. Godfrey , I.A. Grenier (1) , M.-H. Grondin (4) , J.E. Grove , L. Guillemot (4) , S. Guiriec (3) , N. Hamada , A.K. Harding , M. Hayashida , R.E. Hugues , G. Johansson , A.S. Johnson , R.P. Johnson , W.N. Johnson , T. Kamae , H. Katagiri , N. Kawai , M. Kerr , Jürgen Knödlseder (5) , M. L. Kocian , F. Kuehn , M. Kuss , J. Lande , L. Latronico , M. Lemoine-Goumard (4) , F. Longo , F. Loparco , B. Lott (4) , M.N. Lovellette , P. Lubrano , A. Makeev , M.N. Mazziotta , J.E. Mcenery , C. Meurer , P.F. Michelson , W. Mitthumsiri , T. Mizuno , A.A. Moiseev , C. Monte , M.E. Monzani , A. Morselli , I.V. Moskalenko , S. Murgia , P.L. Nolan , J.P. Norris , E. Nuss (3) , T. Ohsugi , A. Okumura , N. Omodei , E. Orlando , J.F. Ormes , M. Ozaki , D. Paneque , J.H. Panetta , D. Parent (4) , M. Pepe , M. Pesce-Rollins , F. Piron (3) , M. Pohl , T. A. Porter , S. Rainò , R. Rando , M. Razzano , A. Reimer , O. Reimer , T. Reposeur (4) , S. Ritz , L. S. Rochester , A. Y. Rodriguez , F. Ryde , H.F-W. Sadrosinski , D. Sanchez (2) , A. Sander , P. M. Saz Parkinson , T.L. Schalk , A. Sellerholm , G. Sgro , D.A. Smith (4) , P.D. Smith , G. Spandre , P. Spinelli , Jean-Luc Starck (1) , F. W. Stecker , M. S. Strickman , A.W. Strong , D. J. Suson , H. Tajima , H. Takahashi , T. Takahashi , T. Tanaka , J.B. Thayer , J.G. Thayer , D.J. Thompson , L. Tibaldo , D. F. Torres , G. Tosti , A. Tramacere , Y. Uchiyama , T. L. Usher , V. Vasileiou , N. Vilchez (5) , V. Vitale , A. P. Waite , P. Wang , B. L. Winer , K. S. Wood , T. Ylinen , M. Ziegler
Aous A. Abdo
  • Function : Author
  • PersonId : 859888
Markus Ackermann
  • Function : Author
Marco Ajello
  • Function : Author
W. B. Atwood
  • Function : Author
Magnus Axelsson
  • Function : Author
Luca Baldini
  • Function : Author
Guido Barbiellini
  • Function : Author
D. Bastieri
  • Function : Author
B.M. Baughmann
  • Function : Author
K. Bechtol
  • Function : Author
R. Bellazzini
  • Function : Author
B. Berenji
  • Function : Author
E.D. Bloom
  • Function : Author
E. Bonamente
  • Function : Author
A.W. Borgland
  • Function : Author
J. Bregeon
A. Brez
  • Function : Author
M. Brigida
  • Function : Author
T.H. Burnett
  • Function : Author
G. A. Caliandro
  • Function : Author
R. A. Cameron
  • Function : Author
P. A. Caraveo
  • Function : Author
P. Carlson
  • Function : Author
C. Cecchi
  • Function : Author
O. Celik
  • Function : Author
A. Chekhtman
  • Function : Author
C.C. Cheung
  • Function : Author
S. Ciprini
  • Function : Author
R. Claus
  • Function : Author
J. Conrad
  • Function : Author
S. Cutini
  • Function : Author
C.D. Dermer
  • Function : Author
A. de Angelis
  • Function : Author
F. de Palma
  • Function : Author
S.W. Digel
  • Function : Author
E. Do Couto E Silva
  • Function : Author
P.S. Drell
  • Function : Author
R. Dubois
  • Function : Author
C. Favuzzi
  • Function : Author
S.J. Fegan
W.B. Focke
  • Function : Author
M. Frailis
  • Function : Author
Y. Fukazawa
S. Funk
  • Function : Author
P. Fusco
  • Function : Author
F. Gargano
  • Function : Author
D. Gasparrini
  • Function : Author
N. Gehrels
  • Function : Author
S. Germani
  • Function : Author
N. Giglietto
F. Giordano
  • Function : Author
T. Glanzman
  • Function : Author
G. Godfrey
  • Function : Author
M.-H. Grondin
J.E. Grove
  • Function : Author
N. Hamada
  • Function : Author
A.K. Harding
  • Function : Author
M. Hayashida
  • Function : Author
R.E. Hugues
  • Function : Author
G. Johansson
A.S. Johnson
  • Function : Author
R.P. Johnson
  • Function : Author
W.N. Johnson
  • Function : Author
T. Kamae
  • Function : Author
H. Katagiri
  • Function : Author
N. Kawai
  • Function : Author
M. Kerr
  • Function : Author
M. L. Kocian
  • Function : Author
F. Kuehn
  • Function : Author
M. Kuss
  • Function : Author
J. Lande
  • Function : Author
L. Latronico
  • Function : Author
F. Longo
F. Loparco
  • Function : Author
B. Lott
M.N. Lovellette
  • Function : Author
P. Lubrano
  • Function : Author
A. Makeev
  • Function : Author
M.N. Mazziotta
  • Function : Author
J.E. Mcenery
  • Function : Author
C. Meurer
  • Function : Author
P.F. Michelson
  • Function : Author
W. Mitthumsiri
  • Function : Author
T. Mizuno
  • Function : Author
A.A. Moiseev
C. Monte
  • Function : Author
M.E. Monzani
  • Function : Author
A. Morselli
  • Function : Author
I.V. Moskalenko
  • Function : Author
S. Murgia
  • Function : Author
P.L. Nolan
  • Function : Author
J.P. Norris
  • Function : Author
T. Ohsugi
  • Function : Author
A. Okumura
  • Function : Author
N. Omodei
  • Function : Author
E. Orlando
  • Function : Author
J.F. Ormes
  • Function : Author
M. Ozaki
D. Paneque
J.H. Panetta
  • Function : Author
M. Pepe
  • Function : Author
M. Pesce-Rollins
M. Pohl
  • Function : Author
T. A. Porter
  • Function : Author
S. Rainò
  • Function : Author
R. Rando
  • Function : Author
M. Razzano
  • Function : Author
A. Reimer
O. Reimer
  • Function : Author
S. Ritz
  • Function : Author
L. S. Rochester
  • Function : Author
A. Y. Rodriguez
  • Function : Author
F. Ryde
  • Function : Author
H.F-W. Sadrosinski
  • Function : Author
A. Sander
P. M. Saz Parkinson
  • Function : Author
T.L. Schalk
  • Function : Author
A. Sellerholm
  • Function : Author
G. Sgro
  • Function : Author
P.D. Smith
  • Function : Author
G. Spandre
  • Function : Author
P. Spinelli
  • Function : Author
Jean-Luc Starck
  • Function : Author
  • PersonId : 858909
F. W. Stecker
  • Function : Author
M. S. Strickman
  • Function : Author
A.W. Strong
  • Function : Author
D. J. Suson
  • Function : Author
H. Tajima
  • Function : Author
H. Takahashi
  • Function : Author
T. Takahashi
  • Function : Author
T. Tanaka
J.B. Thayer
  • Function : Author
J.G. Thayer
  • Function : Author
D.J. Thompson
  • Function : Author
L. Tibaldo
  • Function : Author
D. F. Torres
  • Function : Author
G. Tosti
  • Function : Author
A. Tramacere
  • Function : Author
Y. Uchiyama
  • Function : Author
T. L. Usher
  • Function : Author
V. Vasileiou
  • Function : Author
V. Vitale
A. P. Waite
  • Function : Author
P. Wang
  • Function : Author
B. L. Winer
  • Function : Author
K. S. Wood
  • Function : Author
T. Ylinen
  • Function : Author
M. Ziegler
  • Function : Author

Abstract

Observations by the Large Area Telescope (LAT) on the \textit{Fermi} mission of diffuse $\gamma$-rays in a mid-latitude region in the third quadrant (Galactic longitude $l$ from $200\arcdeg$ to $260\arcdeg$ and latitude $| b |$ from $22\arcdeg$ to $60\arcdeg$) are reported. The region contains no known large molecular cloud and most of the atomic hydrogen is within 1 kpc of the solar system. The contributions of $\gamma$-ray point sources and inverse Compton scattering are estimated and subtracted. The residual $\gamma$-ray intensity exhibits a linear correlation with the atomic gas column density in energy from 100 MeV to 10 GeV. The measured integrated $\gamma$-ray emissivity is $(1.63 \pm 0.05) \times 10^{-26} {\rm photons s^{-1} sr^{-1} H\mathchar`-atom^{-1}}$ and $(0.66 \pm 0.02) \times 10^{-26} {\rm photons s^{-1} sr^{-1} H\mathchar`-atom^{-1}}$ above 100 MeV and above 300 MeV, respectively, with additional systematic error of $\sim 10%$. The differential emissivity in 100 MeV--10 GeV agrees with calculations based on cosmic ray spectra consistent with those directly measured, at the 10% level. The results obtained indicate that cosmic ray nuclei spectra within 1 kpc from the solar system in regions studied are close to the local interstellar spectra inferred from direct measurements at the Earth within $\sim 10%$.

Dates and versions

in2p3-00429043 , version 1 (30-10-2009)

Identifiers

Cite

Aous A. Abdo, Markus Ackermann, Marco Ajello, W. B. Atwood, Magnus Axelsson, et al.. Fermi LAT Observation of Diffuse Gamma-Rays Produced Through Interactions between Local Interstellar Matter and High Energy Cosmic Rays. The Astrophysical Journal, 2009, 703, pp.1249-1256. ⟨10.1088/0004-637X/703/2/1249⟩. ⟨in2p3-00429043⟩
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