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dc.contributor.authorConlon, Joseph P
dc.contributor.authorDay, Francesca
dc.contributor.authorJennings, Nicholas
dc.contributor.authorKrippendorf, Sven
dc.contributor.authorRummel, Markus
dc.date.accessioned2018-10-10T05:18:36Z
dc.date.available2018-10-10T05:18:36Z
dc.date.issued2017-07
dc.identifier.issn1475-7516
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/283417
dc.description.abstractWe 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.
dc.publisherIOP Publishing
dc.subjectactive galactic nuclei
dc.subjectaxions
dc.titleConstraints on axion-like particles from non-observation of spectral modulations for X-ray point sources
dc.typeArticle
prism.issueIdentifier7
prism.numberARTN 005
prism.publicationDate2017
prism.publicationNameJOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
dc.identifier.doi10.17863/CAM.30785
dcterms.dateAccepted2017-06-19
rioxxterms.versionofrecord10.1088/1475-7516/2017/07/005
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.licenseref.startdate2017-07
dc.contributor.orcidDay, Francesca [0000-0001-9475-8856]
dc.identifier.eissn1475-7516
rioxxterms.typeJournal Article/Review
cam.issuedOnline2017-07-03
rioxxterms.freetoread.startdate2018-07-31


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