Constraints on axion-like particles from non-observation of spectral modulations for X-ray point sources
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Publication Date
2017-07Journal Title
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
ISSN
1475-7516
Issue
7
Number
ARTN 005
Type
Article
Metadata
Show full item recordCitation
Conlon, J. P., Day, F., Jennings, N., Krippendorf, S., & Rummel, M. (2017). Constraints on axion-like particles from non-observation of spectral modulations for X-ray point sources. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, (7. ARTN 005)https://doi.org/10.1088/1475-7516/2017/07/005
Abstract
We extend previous searches for X-ray spectral modulations induced by ALP-photon conversion to a variety of new sources, all consisting of quasars or AGNs located in or behind galaxy clusters. We consider a total of seven new sources, with data drawn from the Chandra archive. In all cases the spectrum is well fit by an absorbed power-law with no evidence for spectral modulations, allowing constraints to be placed on the ALP-photon coupling parameter ga(γ)(γ). Two sources are particularly good: the Seyfert galaxy 2E3140 in A1795 and the AGN NGC3862 within the cluster A1367, leading to 95% bounds for light ALPs (ma lesssim 10(−)(12) eV) of ga(γ)(γ) lesssim 1.5 × 10(−)(12) GeV(−)(1) and ga(γ)(γ) lesssim 2.4 × 10(−)(12) GeV(−)(1) respectively.
Keywords
active galactic nuclei, axions
Identifiers
External DOI: https://doi.org/10.1088/1475-7516/2017/07/005
This record's URL: https://www.repository.cam.ac.uk/handle/1810/283417
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