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Measurement of the Dispersion-Galaxy Cross-Power Spectrum with the Second CHIME/FRB Catalog
Haochen Wang1,2, Kiyoshi Masui1,2, Shion Andrew1,2
1Massachusetts Institute of Technology, Department of Physics, 77 Massachusetts Avenue Cambridge, Massachusetts 02139, USA.
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The dispersion of extragalactic fast radio bursts (FRBs) can serve as a powerful probe of the diffuse plasma between and surrounding galaxies, which contains most of the Universe's baryons. By cross-correlating the dispersion of background FRBs with the locations of foreground galaxies, we can study the relative spatial distributions of plasma and galaxies on scales of 0.1 to 50 Mpc, which are strongly affected by feedback processes in galaxy formation. Here, we present the measurement of the dispersion-galaxy angular cross-power spectrum between 2870 FRBs from the Second CHIME/FRB Catalog and nearly 6 million galaxies from the Dark Energy Spectroscopic Instrument (DESI) Legacy Imaging Survey. Over five photometric galaxy redshift bins spanning 0.05

