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T: Fachverband Teilchenphysik

T 102: Axions/ALPs III

T 102.2: Vortrag

Freitag, 20. März 2026, 09:15–09:30, KH 02.019

Axion searches with LOFAR — •Merle Gizinski and Dominik J. Schwarz — Fakultät für Physik, Universität Bielefeld, 33613 Bielefeld

The axion is a promising candidate for cold dark matter, originating as a solution to the strong CP problem. The search for axions in neutron star magnetospheres provides a promising opportunity for detection and is complementary to existing laboratory experiments. The plasma surrounding of a neutron star and its strong magnetic field provide the environment for an axion to convert into a photon. This conversion results in a characteristic, sharp radio line, which may be detectable in the spectrum of the neutron star. The observed frequency of the line is directly linked to the axion mass. Since frequencies below 250 MHz are very hard to access in lab experiments and thus have not been tested, LOFAR (10 − 240 MHz) provides an unique opportunity to constrain the axion to photon coupling in the axion mass range 0.04 − 0.99 µeV.

Keywords: Axion; Pulsar; LOFAR; Dark matter; Neutron star