Flares as fingerprints of inner solar darkness

Details Flares as fingerprints of inner solar darkness Flares as fingerprints of inner solar darkness

2008-08-11

arxiv.org/abs/0808.1545v4

Astronomy and Astrophysics

Astrophysics

Updated, 16 pages, 4 Figures, Simulation results, flaring sun spectrum, ref. with new quiet sun X-ray data, submitted for publ

Scientific paper

X-ray flares and other solar brightenings have been discarded as potential axion signatures. An axion X-ray signal must appear exclusively near the disk centre, and its spectrum must peak at ~4.2keV, contrary to observation. We argue here that due to Compton scattering off the (plasma) electrons the outward propagation of X-rays from axions converted near the Sun's surface can explain energy distribution and non direcivity. Simulation points at the photosphere as the birth place of the presumed axion conversion, implying an axion rest mass of ~0.01eV. At present, even optimistic parameter values can not reproduce the measured intensities. The simulated photon spectrum peaks at low energies. Quiet Sun hard X-rays are in favour of massive and/or light axion involvement.

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