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Giant Molecular Clouds as probes of of Galactic Cosmic Rays with Fermi-LAT
- Source :
- EPJ Web of Conferences, Vol 209, p 01016 (2019)
- Publication Year :
- 2019
- Publisher :
- EDP Sciences, 2019.
-
Abstract
- Direct measurements of Cosmic Rays (CRs) can not extend much further than the Solar System. In order to probe the so-called “sea” of Galactic Cosmic Rays, one should rely on secondary emission. Gamma rays produced in the interstellar gas, when hit by high energy particles, trace the energy distribution of the parent CRs. Giant Molecular Clouds, being huge reservoirs of hydrogen, serve as perfect targets for interaction with CRs. The high particle density in these objects enables to have enhanced emission from small isolated location, and hence to derive information about single spots of the Milky Way. We analyzed more than 9 years data of Fermi-LAT from 18 molecular clouds, located in different regions from 100 pc to more than 10 kpc from us, allowing us to have the most comprehensive study on Galactic Cosmic Rays from Molecular Clouds ever.
- Subjects :
- Physics
Solar System
Hydrogen
QC1-999
Astrophysics::High Energy Astrophysical Phenomena
Molecular cloud
Milky Way
Gamma ray
chemistry.chemical_element
Cosmic ray
Astrophysics::Cosmology and Extragalactic Astrophysics
Astrophysics
01 natural sciences
chemistry
Secondary emission
0103 physical sciences
010306 general physics
010303 astronomy & astrophysics
Astrophysics::Galaxy Astrophysics
Fermi Gamma-ray Space Telescope
Subjects
Details
- ISSN :
- 2100014X
- Volume :
- 209
- Database :
- OpenAIRE
- Journal :
- EPJ Web of Conferences
- Accession number :
- edsair.doi.dedup.....3b51629c59f77e61a08343d9de9df732
- Full Text :
- https://doi.org/10.1051/epjconf/201920901016