The axion-nucleon coupling enables the production of axions through the decay of excited 57Fe isotopes, and axions produced in the Sun through this process are often a target of helioscope searches. We show for the first time that hot, highly magnetic white dwarfs such as ZTF J1901+1458 are a viable target to search for the X-ray signature of axions that were produced by the 57Fe transition in the core and then converted to photons in the magnetosphere. We calculate that a 100 ks observation of ZTF J1901+1458 with NuSTAR would constrain the coupling of axions to nucleons and photons at a level below the bounds of both current and future planned helioscopes.
@article{arxiv.2208.00405,
title = {Constraining Axions with ZTF J1901+1458},
author = {Leesa Fleury and Ilaria Caiazzo and Jeremy Heyl},
journal= {arXiv preprint arXiv:2208.00405},
year = {2023}
}