Year: 2021
Type: article
Abstract: We present a synthesis of fast radio burst (FRB) morphology (the change in flux as a function of time and frequency) as detected in the 400–800 MHz octave by the FRB project on the Canadian Hydrogen Intensity Mapping Experiment (CHIME/FRB), using events from the first CHIME/FRB catalog. The catalog consists of 62 bursts from 18 repeating sources, plus 474 one-off FRBs, detected between 2018 July 25 and 2019 July 2. We identify four observed archetypes of burst morphology (“simple broadband,” “simple narrowband,” “temporally complex,” and “downward drifting”) and describe relevant instrumental biases that are essential for interpreting the observed morphologies. Using the catalog properties of the FRBs, we confirm that bursts from repeating sources, on average, have larger widths, and we show, for the first time, that bursts from repeating sources, on average, are narrower in bandwidth. This difference could be due to beaming or propagation effects, or it could be intrinsic to the populations. We discuss potential implications of these morphological differences for using FRBs as astrophysical tools.
Source: The Astrophysical Journal
Authors: Ziggy Pleunis, Deborah C. Good, Victoria M. Kaspi, Ryan Mckinven, Scott M. Ransom, Paul Scholz, Kevin Bandura, Mohit Bhardwaj, P. J. Boyle, Charanjot Brar, Tomas Cassanelli, Pragya Chawla, Fengqiu (Adam) Dong, Emmanuel Fonseca, B. M. Gaensler, Alexander Josephy, Jane F. Kaczmarek, Calvin Leung, Hsiu-Hsien Lin, Kiyoshi W. Masui, Juan Mena-Parra, Daniele Michilli, Cherry Ng, Chitrang Patel, Masoud Rafiei-Ravandi, Mubdi Rahman, Pranav Sanghavi, Kaitlyn Shin, Kendrick M. Smith, Ingrid H. Stairs, Shriharsh P. Tendulkar
Institutions: Trottier Space Institute at McGill, McGill University, University of British Columbia, University of Toronto, National Radio Astronomy Observatory, West Virginia University, National Research Council Canada, Massachusetts Institute of Technology, Canadian Institute for Theoretical Astrophysics, University of Waterloo, Perimeter Institute, Tata Institute of Fundamental Research, National Centre for Radio Astrophysics
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $4,499
Funders: National Science Foundation, U.S. Department of Defense, Canadian Institute for Advanced Research, McGill University, Government of Canada, Canada Research Chairs, Industry Canada, University of Toronto, Institut Périmètre de physique théorique, Smithsonian Astrophysical Observatory, National Defense Science and Engineering Graduate, McGill Space Institute, Natural Sciences and Engineering Research Council of Canada, National Research Council Canada, Fonds de recherche du Québec – Nature et technologies
OpenAlex ID: W3136957856