CHIME/FRB Catalog 1 results: statistical cross-correlations with large-scale structure

• Published in: arXiv.org
• Main Authors: Rafiei-Ravandi, Masoud, Smith, Kendrick M, Li, Dongzi, Masui, Kiyoshi W, Josephy, Alexander, Dobbs, Matt, Lang, Dustin, Bhardwaj, Mohit, Patel, Chitrang, Bandura, Kevin, Berger, Sabrina, Boyle, P J, Brar, Charanjot, Breitman, Daniela, Cassanelli, Tomas, Chawla, Pragya, Fengqiu Adam Dong, Fonseca, Emmanuel, Gaensler, B M, Giri, Utkarsh, Good, Deborah C, Halpern, Mark, Kaczmarek, Jane, Kaspi, Victoria M, Leung, Calvin, Lin, Hsiu-Hsien, Mena-Parra, Juan, Meyers, B W, Michilli, D, Münchmeyer, Moritz, Ng, Cherry, Petroff, Emily, Pleunis, Ziggy, Rahman, Mubdi, Sanghavi, Pranav, Scholz, Paul, Shin, Kaitlyn, Stairs, Ingrid H, Tendulkar, Shriharsh P, Vanderlinde, Keith, Zwaniga, Andrew
• Format: Paper Journal Article
• Language: English
• Published: Ithaca Cornell University Library, arXiv.org 26.11.2021
• Subjects: Angular resolution; Astronomical catalogs; Cross correlation; Dark matter; Galactic halos; Galaxies; Large scale structure of the universe; Physics - Cosmology and Nongalactic Astrophysics; Physics - High Energy Astrophysical Phenomena; Radio bursts; Red shift; Stars & galaxies
• ISSN: 2331-8422
• DOI: 10.48550/arxiv.2106.04354

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 \(\sim 10^{-4}\), accounting for look-elsewhere factors) cross-correlation between CHIME FRBs and galaxies in the redshift range \(0.3 \lesssim z \lesssim 0.5\), in three photometric galaxy surveys: WISE\(\times\)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 (\(\sim 400\) pc cm\(^{-3}\)), and show that this can plausibly arise from gas in large halos (\(M \sim 10^{14} M_\odot\)), for FRBs near the halo center (\(r \lesssim 100\) kpc). These results will improve in future CHIME/FRB catalogs, with more FRBs and better angular resolution.