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No Evidence for Axions from Chandra Observation of the Magnetic White Dwarf RE J0317-853

Safdi, Benjamin R.; Dessert, Christopher; Long, Andrew J.

Axions with couplings g_{a γ γ}∼few ×10^-11 GeV^-1 to electromagnetism may resolve a number of astrophysical anomalies, such as unexpected ∼TeV transparency, anomalous stellar cooling, and x-ray excesses from nearby neutron stars. We show, however, that such axions are severely constrained by the nonobservation of x ray…