http://arxiv.org/abs/2304.04735
Wave dark matter (DM) represents a class of the most representative DM candidates. Due to its periodic perturbation to spacetime, the wave DM can be detected with a galactic interferometer – pulsar timing array (PTA). We perform in this Letter a first analysis of applying the $\gamma$-ray PTA to detect the wave DM, with the data of Fermi Large Area Telescope (Fermi-LAT). Despite the limitation in statistics, the $\gamma$-PTA demonstrates a promising sensitivity potential for a mass $\sim 10^{-23}-10^{-22}$ eV. We show that the upper limits not far from those of the dedicated radio-PTA projects can be achieved. Particularly, we have fulfilled an analysis to cross-correlate the pulsar data, which has been essentially missing so far in real data analysis but is known to be crucial for identifying the nature of potential signals, with the Fermi-LAT data of two pulsars.
H. Luu, T. Liu, J. Ren, et. al.
Tue, 11 Apr 23
47/63
Comments: 5 pages, 3 figures. Comments welcome!