scholarly journals The Three-dimensional Spatial Distribution of Interstellar Gas in the Milky Way: Implications for Cosmic Rays and High-energy Gamma-ray Emissions

2018 ◽  
Vol 856 (1) ◽  
pp. 45 ◽  
Author(s):  
Guđlaugur Jóhannesson ◽  
Troy A. Porter ◽  
Igor V. Moskalenko
Keyword(s):  
Spatial Distribution ◽  
Cosmic Rays ◽  
Milky Way ◽  
Gamma Ray ◽  
Three Dimensional ◽  
High Energy ◽  
Interstellar Gas ◽  
High Energy Gamma ◽  
Energy Gamma

scholarly journals Recent Status of High-Energy Gamma-Ray Astronomy

2003 ◽  
Vol 214 ◽  
pp. 382-386
Author(s):  
Masato Takita
Keyword(s):  
Cosmic Rays ◽  
Gamma Ray ◽  
High Energy ◽  
Gamma Ray Astronomy ◽  
High Energy Gamma ◽  
Energy Gamma

Sub-TeV and TeV energy gamma-ray astronomy reveals non-thermal gamma-ray pictures of our universe and serve as a probe to understand the origin, acceleration and propagation of cosmic rays. Recent status of ground-based high-energy gamma-ray astronomy is reviewed.

The estimation of background production by cosmic rays in high-energy gamma ray telescopes

1991 ◽  
Vol 38 (2) ◽  
pp. 553-558
Author(s):  
H.L. Edwards ◽  
P.L. Nolan ◽  
E.B. Hughes ◽  
Y.C. Lin ◽  
D.G. Koch ◽  
...  
Keyword(s):  
Cosmic Rays ◽  
Gamma Ray ◽  
High Energy ◽  
High Energy Gamma ◽  
Energy Gamma ◽  
Gamma Ray Telescopes

scholarly journals High-energy gamma rays and the large-scale distribution of gas and cosmic rays

1985 ◽  
Vol 106 ◽  
pp. 213-218
Author(s):  
W. Hermsen ◽  
J.B.G.M. Bloemen
Keyword(s):  
Cosmic Rays ◽  
Column Density ◽  
Large Scale ◽  
Gamma Ray ◽  
Cosmic Ray ◽  
High Energy ◽  
Interstellar Gas ◽  
Density Maps ◽  
Nuclear Component ◽  
Energy Gamma

The COS-B gamma-ray survey is compared with 12CO and HI surveys in a region containing the Orion complex and in the outer Galaxy. The observed gamma-ray intensities in the Orion region (100 MeV<E<5 GeV) can be ascribed to the interaction of uniformly distributed cosmic rays with the interstellar gas. Calibration of the ratio between H2 column-density and integrated CO line intensity resulted in the value: (3.0±0.7)x102 0 molecules cm-2K -1km -1s. In the outer Galaxy HI column-density maps in three galacto-centric distance ranges are used in combination with COS-B gamma-ray data to determine the radial distribution of the gamma-ray emissivity. A steep negative gradient of the emissivity for the 70 MeV-150 MeV range and an approximately constant (within ~20%) emissivity for the 300 MeV-5 GeV range is found. The result is interpreted as a strong decrease in the cosmic-ray electron density and a near constancy of the nuclear component.

High energy gamma ray observations and the coupling between galactic cosmic rays and matter

1992 ◽  
Author(s):  
S. D. Hunter ◽  
D. L. Bertsch ◽  
T. Dame ◽  
B. L. Dingus ◽  
C. E. Fichtel ◽  
...  
Keyword(s):  
Cosmic Rays ◽  
Gamma Ray ◽  
High Energy ◽  
Galactic Cosmic Rays ◽  
High Energy Gamma ◽  
Energy Gamma
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