FAST RADIO BURSTS: FROM A HANDFUL TO HUNDREDS WITH CHIME/FRB KIYOSHI MASUI, ALEX JOSEPHY, AND MOHIT BHARDWAJ FOR THE CHIME/FRB COLLABORATION AAS PRESS BRIEFING JUNE 9, 2021 Correspondance to: [email protected] (857) 207-6121 FAST RADIO BURSTS Bright, brief (millisecond) flashes of radio light coming from other galaxies Likely neutron star/magnetar origin but otherwise poorly understood, limited by small numbers Distortion of signals (dispersion) carries record of structure travelled through CHIME/FRB COLLABORATION ARTWORK: ESA CANADIAN HYDROGEN INTENSITY MAPPING EXPERIMENT FAST RADIO BURST INSTRUMENT (CHIME/FRB) CHIME/FRB COLLABORATION chime-experiment.ca CHIME/FRB CATALOG MAP OF EVERY KNOWN FRB UP TO JULY 2018 CHIME/FRB COLLABORATION CHIME/FRB CATALOG MAP OF EVERY KNOWN FRB UP TO JULY 2019 CHIME/FRB COLLABORATION CATALOG CONTENTS 535 FRBs observed between July 2018 and July 2019 Includes 61 bursts from 18 repeating sources Properties of each burst: time, sky location, brightness, duration, dispersion, etc. See CHIME/FRB Collaboration 2021 CHIME/FRB COLLABORATION A NEW PHASE OF FRB SCIENCE First large sample of FRBs Enables precision studies of the FRB Population Opportunity to study large- scale structure of the Universe CHIME/FRB COLLABORATION POPULATION MODELLING Simulating fake bursts allows us to understand our observational biases Measure brightness distribution and rate: ~800 bright FRBs per day CHIME/FRB COLLABORATION SKY DISTRIBUTION Must consider sensitivity, telescope response, and galactic foreground. After correcting for these effects, we find strong evidence for uniform distribution. See: Josephy et al. 2021 CHIME/FRB COLLABORATION LARGE SCALE STRUCTURE Find FRBs to be correlated with galaxies, for a wide redshift range Ushering in new era of FRB cosmology See: Rafiei-Ravandi et al. 2021 CREDIT: MILLENNIUM SIMULATION CHIME/FRB COLLABORATION BURST FINGERPRINTS See: Pleunis et al. 2021 Compared to one-offs, repeaters tend to have larger widths and smaller bandwidths. CHIME/FRB COLLABORATION FRB20181030A A repeating FRB in the CHIME/FRB Catalog Burst properties suggest local universe origin FRB localized to a sky area ~140x smaller than the Moon on the sky CHIME/FRB COLLABORATION FRB20181030A: HOST ASSOCIATION NGC3252: bright, star forming, spiral galaxy in Draco constellation at a distance of 65 million light- years. Probability of chance alignment - <0.25%. One of the closest FRBs discovered to date. CHIME/FRB COLLABORATION FRB20181030A: IMPLICATIONS VERY PROMISING TO UNCOVER THE ORIGIN OF FRBS. SGR1935+2154 M81 NGC 3252 FRB20180916A 5X 7.5X 12 million light-years 65 million light-years 486 million light-years CHIME/FRB COLLABORATION CHIME/FRB CATALOG PUBLIC RELEASE Hundreds of new bursts usher new phase of big-data FRB science Catalog and data publicly available at https://www.chime-frb.ca Stay tuned for more analysis results, from us and the community Correspondance to: Kiyoshi Masui [email protected] (857) 207-6121.