Speaker
Prof.
Guenter Sigl
(University of Hamburg)
Description
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. We
give a short overview over estimated intensities and prospects for detectability
of such radio lines.
Primary author
Prof.
Guenter Sigl
(University of Hamburg)
