Search for Spectral Irregularities due to Photon–Axionlike-Particle Oscillations with the Fermi Large Area Telescope
Journal Article
·
· Physical Review Letters
In this paper, 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 x 10-12 GeV-1 for ALP masses 0.5 ≲ ma ≲ 5 neV at 95% confidence. Finally, 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.
- Research Organization:
- SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Stockholm Univ. (Sweden)
- Sponsoring Organization:
- USDOE; National Aeronautics and Space Administration (NASA); Ministry of Education, University and Research (MIUR) (Italy)
- Contributing Organization:
- The Fermi-LAT Collaboration
- Grant/Contract Number:
- AC02-76SF00515; FIRB-2012-RBFR12PM1F
- OSTI ID:
- 1355688
- Alternate ID(s):
- OSTI ID: 1248257
- Journal Information:
- Physical Review Letters, Vol. 116, Issue 16; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Cited by: 129 works
Citation information provided by
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