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Constraints on axion-like particles from non-observation of spectral modulations for X-ray point sources

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 $g_{a\gamma\gamma}$. Two sources are partic...

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Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1088/1475-7516/2017/07/005

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Institution:
University of Oxford
Oxford college:
New College
Role:
Author
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Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Theoretical Physics
Role:
Author
More by this author
Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Theoretical Physics
Role:
Author
More by this author
Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Theoretical Physics
Role:
Author
More from this funder
Grant:
‘Supersymmetry Breaking in String Theory’ (307605
Publisher:
IOP Publishing Publisher's website
Journal:
Journal of Cosmology and Astroparticle Physics Journal website
Volume:
2017
Issue:
07
Article number:
005
Publication date:
2017-07-03
Acceptance date:
2017-06-19
DOI:
EISSN:
1475-7516
Source identifiers:
691079
Keywords:
Pubs id:
pubs:691079
UUID:
uuid:6ec4847a-295d-4cf2-8a1d-2f73e296cd7e
Local pid:
pubs:691079
Deposit date:
2017-06-19

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