Searches for Axion-Like Particles with NGC1275: Current and Future Bounds
Abstract
Galaxy clusters contain large magnetic fields that make them excellent targets to search for ultralight Axion-Like Particles (ALPs). ALP-photon interconversion imprints quasi-sinusoidal oscillations on the X-ray spectra of point sources in or behind the cluster. The absence of substantial oscillations allows us to place bounds on ga γ γ. Here the bounds from the Chandra X-ray observations of NGC1275 are presented, as well as those predicted for the Athena X-ray observatory, due to launch in 2028.
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