We find that the polarimetric observations of protoplanetary disks are useful to search for ultra-light axion dark matter. Axion dark matter predicts the rotation of the linear polarization plane of propagating light, and protoplanetary disks are ideal targets to observe it. We show that a recent observation puts the tightest constraint on the axion-photon coupling constant for axion mass m≲10−21eV.
@article{arxiv.1811.03525,
title = {Hunting Axion Dark Matter with Protoplanetary Disk Polarimetry},
author = {Tomohiro Fujita and Ryo Tazaki and Kenji Toma},
journal= {arXiv preprint arXiv:1811.03525},
year = {2019}
}
Comments
5 pages, 3 figures, Updated to match the version accepted by PRL