The CHIME/FRB Project has recently released its first catalog of fast radio bursts (FRBs), containing 492 unique sources. We present results from angular cross-correlations of CHIME/FRB sources with galaxy catalogs. We find a statistically significant (p-value ∼10−4, accounting for look-elsewhere factors) cross-correlation between CHIME FRBs and galaxies in the redshift range 0.3≲z≲0.5, in three photometric galaxy surveys: WISE×SCOS, DESI-BGS, and DESI-LRG. The level of cross-correlation is consistent with an order-one fraction of the CHIME FRBs being in the same dark matter halos as survey galaxies in this redshift range. We find statistical evidence for a population of FRBs with large host dispersion measure (∼400 pc cm−3), and show that this can plausibly arise from gas in large halos (M∼1014M⊙), for FRBs near the halo center (r≲100 kpc). These results will improve in future CHIME/FRB catalogs, with more FRBs and better angular resolution.
@article{arxiv.2106.04354,
title = {CHIME/FRB Catalog 1 results: statistical cross-correlations with large-scale structure},
author = {Masoud Rafiei-Ravandi and Kendrick M. Smith and Dongzi Li and Kiyoshi W. Masui and Alexander Josephy and Matt Dobbs and Dustin Lang and Mohit Bhardwaj and Chitrang Patel and Kevin Bandura and Sabrina Berger and P. J. Boyle and Charanjot Brar and Daniela Breitman and Tomas Cassanelli and Pragya Chawla and Fengqiu Adam Dong and Emmanuel Fonseca and B. M. Gaensler and Utkarsh Giri and Deborah C. Good and Mark Halpern and Jane Kaczmarek and Victoria M. Kaspi and Calvin Leung and Hsiu-Hsien Lin and Juan Mena-Parra and B. W. Meyers and D. Michilli and Moritz Münchmeyer and Cherry Ng and Emily Petroff and Ziggy Pleunis and Mubdi Rahman and Pranav Sanghavi and Paul Scholz and Kaitlyn Shin and Ingrid H. Stairs and Shriharsh P. Tendulkar and Keith Vanderlinde and Andrew Zwaniga},
journal= {arXiv preprint arXiv:2106.04354},
year = {2021}
}