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Abstract |
Axion–like particles (ALPs) can convert into photons in several different ways: in an external
magnetic field (known as the Primakoff effect), by decay into two photons, or through
parametric amplification of incoming radio photons in an oscillating ALP field within a
narrow frequency range. For non–relativistic ALPs all three effects can give rise to radio
lines, in particular from astrophysical objects with strong magnetic fields or from regions
with ALP over–densities, such as ALP stars. I will give an overview over estimated
intensities and prospects for detectability of such radio lines. |
