Untangling the Complexity in the Galactic Centre: a way to understand the origin of the gamma-ray emission from the inner Galaxy

@inproceedings{Ventura2021UntanglingTC,
  title={Untangling the Complexity in the Galactic Centre: a way to understand the origin of the gamma-ray emission from the inner Galaxy},
  author={S. Ventura},
  year={2021}
}
The origin of the high-energy gamma-ray emission from the Milky Way center is still unclear and debated because of the impact of systematics afflicting the measurements from current experiments. Several theories and phenomenological models attempt to explain the intricate panorama. The presence of a PeVatron in the Central Molecular Zone or in its vicinity, the contribution of the hard-component of the diffuse gamma-ray emission, and dark matter annihilation scenario are among the most… Expand

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References

SHOWING 1-10 OF 54 REFERENCES
Shedding (Gamma) Light on the Cosmic Ray Population in the Galactic Center Region
The nature of the very-high-energy gamma-ray diffuse emission measured by H.E.S.S. in the Galactic Center (GC) region is still matter of debate. Two main scenarios have been proposed to interpretExpand
Towards a realistic astrophysical interpretation of the gamma-ray Galactic center excess
A spherical-symmetric gamma-ray emission from the central region of the Galaxy has been recently identified in Fermi-LAT data, and initially associated to dark matter particle annihilations. GuidedExpand
DEVELOPMENT of the MODEL of GALACTIC INTERSTELLAR EMISSION for STANDARD POINT-SOURCE ANALYSIS of FERMI LARGE AREA TELESCOPE DATA
Most of the celestial γ rays detected by the Large Area Telescope (LAT) on board the Fermi Gamma-ray Space Telescope originate from the interstellar medium when energetic cosmic rays interact withExpand
Massive stars as major factories of Galactic cosmic rays
The identification of the main contributors to the locally observed fluxes of cosmic rays is a prime objective in the resolution of the long-standing enigma of the source of cosmic rays. We report onExpand
Discovery of very-high-energy γ-rays from the Galactic Centre ridge
The source of Galactic cosmic rays (with energies up to 1015 eV) remains unclear, although it is widely believed that they originate in the shock waves of expanding supernova remnants. At present theExpand
Fermi-LAT observations of the diffuse γ-ray emission: implications for cosmic rays and the interstellar medium
The gamma-ray sky >100 MeV is dominated by the diffuse emissions from interactions of cosmic rays with the interstellar gas and radiation fields of the Milky Way. Observations of these diffuseExpand
Cosmic ray nuclei, antiprotons and gamma rays in the galaxy: a new diffusion model
We model the transport of cosmic ray nuclei in the galaxy by means of a new numerical code. At variance with previous numerical models, ours accounts for a generic spatial distribution of theExpand
The gamma-ray and neutrino sky: A consistent picture of Fermi-LAT, Milagro, and IceCube results
We compute the gamma-ray and neutrino diffuse emission of the Galaxy on the basis of a recently proposed phenomenological model characterized by radially dependent cosmic-ray (CR) transportExpand
The galactic center massive black hole and nuclear star cluster
The Galactic Center is an excellent laboratory for studying phenomena and physical processes that may be occurring in many other galactic nuclei. The Center of our Milky Way is by far the closestExpand
A lower limit of 50 microgauss for the magnetic field near the Galactic Centre
TLDR
A compilation of previous data is reported that reveals a downward break in the region's non-thermal radio spectrum (attributable to a transition from bremsstrahlung to synchrotron cooling of the in situ cosmic-ray electron population), and it is shown that the spectral break requires that the Galactic Centre field be at least ∼50 μG on 400 pc scales, lest the syn chrotron-emitting electrons produce too much γ-ray emission. Expand
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