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Search for Spectral Irregularities due to Photon-Axionlike-Particle Oscillations with the Fermi Large Area Telescope.
- Source :
-
Physical review letters [Phys Rev Lett] 2016 Apr 22; Vol. 116 (16), pp. 161101. Date of Electronic Publication: 2016 Apr 20. - Publication Year :
- 2016
-
Abstract
- We report on the search for spectral irregularities induced by oscillations between photons and axionlike-particles (ALPs) in the γ-ray spectrum of NGC 1275, the central galaxy of the Perseus cluster. Using 6 years of Fermi Large Area Telescope data, we find no evidence for ALPs and exclude couplings above 5×10^{-12} GeV^{-1} for ALP masses 0.5≲m_{a}≲5 neV at 95% confidence. The limits are competitive with the sensitivity of planned laboratory experiments, and, together with other bounds, strongly constrain the possibility that ALPs can reduce the γ-ray opacity of the Universe.
Details
- Language :
- English
- ISSN :
- 1079-7114
- Volume :
- 116
- Issue :
- 16
- Database :
- MEDLINE
- Journal :
- Physical review letters
- Publication Type :
- Academic Journal
- Accession number :
- 27152783
- Full Text :
- https://doi.org/10.1103/PhysRevLett.116.161101