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Transparency of the Sun to gamma rays due to axionlike particles
Stockholm University, Faculty of Science, Department of Physics.
2007 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 98, no 20, 201801- p.Article in journal (Refereed) Published
Abstract [en]

It is shown that the Sun can become partially transparent to high energy photons in the presence of a pseudoscalar. In particular, if the axion interpretation of the PVLAS result were true, then up to 2% of GeV energy gamma rays might pass through the Sun, while an even stronger effect is expected for some axion parameters. We discuss the possibilities of observing this effect. Present data are limited to the observation of the solar occultation of 3C 279 by the Energetic Gamma-Ray Experiment Telescope in 1991; 98% C.L. detection of a nonzero flux of gamma rays passing through the Sun is not yet conclusive. Since the same occultation happens every October, future experiments, e.g., the Gamma-Ray Large Area Space Telescope, are expected to have better sensitivity.

Place, publisher, year, edition, pages
2007. Vol. 98, no 20, 201801- p.
Keyword [en]
Invisible-axiom, Quiet sun
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-56575DOI: 10.1103/PhysRevLett.98.201801ISI: 000246624000013OAI: oai:DiVA.org:su-56575DiVA: diva2:411839
Note
authorCount :3Available from: 2011-04-19 Created: 2011-04-19 Last updated: 2017-12-11Bibliographically approved

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