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

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arxiv 2106.04354 v2 pith:CBYFHWLY submitted 2021-06-08 astro-ph.CO astro-ph.HE

Masoud Rafiei-Ravandi , Kendrick M. Smith , Dongzi Li , Kiyoshi W. Masui , Alexander Josephy , Matt Dobbs , Dustin Lang , Mohit Bhardwaj
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Chitrang Patel Kevin Bandura Sabrina Berger P. J. Boyle Charanjot Brar Daniela Breitman Tomas Cassanelli Pragya Chawla Fengqiu Adam Dong Emmanuel Fonseca B. M. Gaensler Utkarsh Giri Deborah C. Good Mark Halpern Jane Kaczmarek Victoria M. Kaspi Calvin Leung Hsiu-Hsien Lin Juan Mena-Parra B. W. Meyers D. Michilli Moritz Münchmeyer Cherry Ng Emily Petroff Ziggy Pleunis Mubdi Rahman Pranav Sanghavi Paul Scholz Kaitlyn Shin Ingrid H. Stairs Shriharsh P. Tendulkar Keith Vanderlinde Andrew Zwaniga
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abstract

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.

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Cited by 1 Pith paper

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  1. Updating the PATH framework with FRB host galaxy models

    astro-ph.HE 2026-06 conditional novelty 4.0 of 10

    PATH is extended with three fitted P(m_r|z) prior models combined with P(z|DM), raising host-association confidence for ASKAP FRBs while showing fainter-than-expected host magnitude distribution.

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