CHIME/FRB Catalog 1 Results: Statistical Cross-correlations with Large-scale Structure

  • Masoud Rafiei-Ravandi
  • , Kendrick M. Smith
  • , Dongzi Li
  • , Kiyoshi W. Masui
  • , Alexander Josephy
  • , Matt Dobbs
  • , Dustin Lang
  • , Mohit Bhardwaj
  • , 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

Research output: Contribution to journalArticlepeer-review

53 Scopus citations

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 ∼ 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 ∼ 1014 M⊙), 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.

Original languageEnglish
Article number42
JournalAstrophysical Journal
Volume922
Issue number1
DOIs
StatePublished - Nov 20 2021

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