The DOI matches its Crossref record; 5 of the 5 references it cites were found in a registry or an index.
Cosmic ray protons in the inner Galaxy and the Galactic Center gamma-ray excess
Open accessAbstract
A gamma-ray excess over background has been claimed in the inner regions of the Galaxy, triggering some excitement about the possibility that the gamma rays originate from the annihilation of dark matter particles. We point out that the existence of such an excess depends on how the diffuse gamma-ray background is defined, and on the procedure employed to fit such background to observations. We demonstrate that a gamma-ray emission with spectral and morphological features closely matching the observed excess arises from a population of cosmic ray protons in the inner Galaxy, and provides proof of principle and arguments for the existence of such a population, most likely originating from local supernova remnants. Specifically, the ``Galactic center excess'' is readily explained by a recent cosmic ray injection burst, with an age in the 1--10 kilo-year range, while the extended inner Galaxy excess points to mega-year old injection episodes, continuous or impulsive. We conclude that it is premature to argue that there are no standard astrophysical mechanisms that can explain the excess.
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Cites
THE LARGE AREA TELESCOPE ON THE FERMI GAMMA-RAY SPACE TELESCOPE MISSION
Atwood, W. B., Abdo, A. A., Ackermann, M., Althouse, W., Anderson, B., Axelsson, M., Baldini, L., Ballet, J., Band, D. L., Barbiellini, G., et al. (2009) · The Astrophysical Journal · doi:10.1088/0004-637x/697/2/1071 · Cited by 4,198
THE GALACTIC CENTER ENVIRONMENT
Morris, M., & Serabyn, E. (1996) · Annual Review of Astronomy and Astrophysics · doi:10.1146/annurev.astro.34.1.645 · Cited by 930
Fermi Bubbles: Giant, Multibillion-Year-Old Reservoirs of Galactic Center Cosmic Rays
Crocker, R. M., & Aharonian, F. (2011) · Physical Review Letters · doi:10.1103/physrevlett.106.101102 · Cited by 242
THE FERMI BUBBLES. I. POSSIBLE EVIDENCE FOR RECENT AGN JET ACTIVITY IN THE GALAXY
Guo, F., & Mathews, W. G. (2012) · The Astrophysical Journal · doi:10.1088/0004-637x/756/2/181 · Cited by 231
THE FERMI BUBBLES: SUPERSONIC ACTIVE GALACTIC NUCLEUS JETS WITH ANISOTROPIC COSMIC-RAY DIFFUSION
Yang, H.-Y. K., Ruszkowski, M., Ricker, P. M., Zweibel, E., & Lee, D. (2012) · The Astrophysical Journal · doi:10.1088/0004-637x/761/2/185 · Cited by 147
Cited by
Background model systematics for the Fermi GeV excess
Calore, F., Cholis, I., & Weniger, C. (2015) · Journal of Cosmology and Astroparticle Physics · doi:10.1088/1475-7516/2015/03/038 · Cited by 461
Kafexhiu, E., Aharonian, F., Taylor, A. M., & Vila, G. S. (2014) · Physical Review D · doi:10.1103/physrevd.90.123014 · Cited by 355
The Nine Lives of Cosmic Rays in Galaxies
Grenier, I. A., Black, J. H., & Strong, A. W. (2015) · Annual Review of Astronomy and Astrophysics · doi:10.1146/annurev-astro-082214-122457 · Cited by 320
Calore, F., Cholis, I., McCabe, C., & Weniger, C. (2015) · Physical Review D · doi:10.1103/physrevd.91.063003 · Cited by 301
Evidence for Unresolvedγ-Ray Point Sources in the Inner Galaxy
Lee, S. K., Lisanti, M., Safdi, B. R., Slatyer, T. R., & Xue, W. (2016) · Physical Review Letters · doi:10.1103/physrevlett.116.051103 · Cited by 282
Metadata
- Authors
- Carlson, E., & Profumo, S.
- Venue
- Physical Review D
- Publisher
- American Physical Society (APS)
- Published
- 2014-07-21
- Volume
- 90
- Issue
- 2
- ISSN
- 0556-2821 (ISSN-L)
- 1550-7998
- 1550-2368
- OpenAlex
- W2168587552
- Cited by
- 161
- References
- 5
- FWCI
- 15.78
- Type
- journal article
- Language
- en
- Open access
- green
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