Solar X-rays from Axions: Rest-Mass Dependent Signatures

Details Solar X-rays from Axions: Rest-Mass Dependent Signatures Solar X-rays from Axions: Rest-Mass Dependent Signatures

2010-03-10

arxiv.org/abs/1003.2181v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

To appear in Proceedings of the 5th Patras Axion Workshop, Durham 2009

Scientific paper

The spectral shape of solar X-rays is a power law. The more active the Sun is, the less steep the distribution. This behaviour can be explained by axion regeneration to X-rays occurring ~400km deep into the photosphere. Their down-comptonization reproduces the measured spectral shape, pointing at axions with rest mass m_a~17 meV/c2, without contradicting astrophysical-laboratory limits. Directly measured soft X-ray spectra from the extremely quiet Sun during 2009 (SphinX mission), though hitherto overlooked, fitt the axion scenario.

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