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Search for Spectral Irregularities due to Photon-Axionlike-Particle Oscillations with the Fermi Large Area Telescope
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics. Oskar Klein Centre for Cosmoparticle Physics, Sweden.
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics. Oskar Klein Centre for Cosmoparticle Physics, Sweden.
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Number of Authors: 102
2016 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 116, no 16, 161101Article in journal (Refereed) Published
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Abstract [en]

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 0.5ma5 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.

Place, publisher, year, edition, pages
American Physical Society , 2016. Vol. 116, no 16, 161101
Keyword [en]
Photons, Telescopes, Ultraviolet spectroscopy, Gamma ray spectra, Laboratory experiments, Large area telescopes, Particle oscillations, Gamma rays
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-187721DOI: 10.1103/PhysRevLett.116.161101ISI: 000374559300002Scopus ID: 2-s2.0-84964467037OAI: oai:DiVA.org:kth-187721DiVA: diva2:931318
Note

Funding Details: NASA, National Aeronautics and Space Administration

QC 20160527

Available from: 2016-05-27 Created: 2016-05-27 Last updated: 2016-11-29Bibliographically approved

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