Mathematics – Logic
Scientific paper
May 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aas...212.0402h&link_type=abstract
American Astronomical Society, AAS Meeting #212, #4.02; Bulletin of the American Astronomical Society, Vol. 40, p.193
Mathematics
Logic
Scientific paper
The axion is a hypothetical weakly-interacting elementary particle. The solar core may produce a copious axion flux via the Primakoff effect. This same process can also convert a tiny fraction of the axions back into photons via interaction with the magnetic field threading the solar atmosphere. The spectral signature of the emitted X-rays is determined mainly by the temperature of the solar core, and the spatial distribution also depends strongly on the solar magnetic field in the back-conversion process. The X-ray intensity thus varies as Gaγγ(∫BperpdL)2, where Bperp is the perpendicular component of the chromospheric and coronal magnetic field in the appropriate zone for interaction and photon escape, and Gaγγ is the (unknown) coupling constant, dependent on the (unknown) mass of the axion. We describe observational tests suitable for solar X-ray imagers and discuss projects now under way with Yohkoh/SXT, RHESSI, and Hinode/XRT. The successful detection of axions would have implications for basic physics and for cosmological dark matter. It would also help us to characterize the ill-understood extension of the solar magnetic field into the chromosphere and corona. We specifically focus on applying the existing understanding of solar (and stellar) magnetism to this problem.
Acton Loren W.
Bibber Karl van
DeLuca Edward E.
Hannah Iain G.
Hudson Hugh S.
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