The Astrophysical Journal (Jan 2024)
Morphologies of Bright Complex Fast Radio Bursts with CHIME/FRB Voltage Data
- Jakob T. Faber,
- Daniele Michilli,
- Ryan Mckinven,
- Jianing Su,
- Aaron B. Pearlman,
- Kenzie Nimmo,
- Robert A. Main,
- Victoria Kaspi,
- Mohit Bhardwaj,
- Shami Chatterjee,
- Alice P. Curtin,
- Matt Dobbs,
- Gwendolyn Eadie,
- B. M. Gaensler,
- Zarif Kader,
- Calvin Leung,
- Kiyoshi W. Masui,
- Ayush Pandhi,
- Emily Petroff,
- Ziggy Pleunis,
- Masoud Rafiei-Ravandi,
- Ketan R. Sand,
- Paul Scholz,
- Kaitlyn Shin,
- Kendrick Smith,
- Ingrid Stairs
Affiliations
- Jakob T. Faber
- ORCiD
- Department of Physics, McGill University , 3600 rue University, Montréal, QC H3A 2T8, Canada ; [email protected]; Trottier Space Institute, McGill University , 3550 rue University, Montréal, QC H3A 2A7, Canada; Cahill Center for Astronomy and Astrophysics , MC 249-17 California Institute of Technology, Pasadena, CA 91125, USA
- Daniele Michilli
- ORCiD
- MIT Kavli Institute for Astrophysics and Space Research , Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA; Department of Physics, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, MA 02139, USA
- Ryan Mckinven
- ORCiD
- Department of Physics, McGill University , 3600 rue University, Montréal, QC H3A 2T8, Canada ; [email protected]; Trottier Space Institute, McGill University , 3550 rue University, Montréal, QC H3A 2A7, Canada
- Jianing Su
- ORCiD
- Department of Physics, McGill University , 3600 rue University, Montréal, QC H3A 2T8, Canada ; [email protected]; Dunlap Institute for Astronomy & Astrophysics, University of Toronto , 50 St. George Street, Toronto, ON M5S 3H4, Canada
- Aaron B. Pearlman
- ORCiD
- Department of Physics, McGill University , 3600 rue University, Montréal, QC H3A 2T8, Canada ; [email protected]; Trottier Space Institute, McGill University , 3550 rue University, Montréal, QC H3A 2A7, Canada
- Kenzie Nimmo
- ORCiD
- MIT Kavli Institute for Astrophysics and Space Research , Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA; Department of Physics, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, MA 02139, USA
- Robert A. Main
- ORCiD
- Department of Physics, McGill University , 3600 rue University, Montréal, QC H3A 2T8, Canada ; [email protected]; Trottier Space Institute, McGill University , 3550 rue University, Montréal, QC H3A 2A7, Canada
- Victoria Kaspi
- ORCiD
- Department of Physics, McGill University , 3600 rue University, Montréal, QC H3A 2T8, Canada ; [email protected]; Trottier Space Institute, McGill University , 3550 rue University, Montréal, QC H3A 2A7, Canada
- Mohit Bhardwaj
- ORCiD
- Department of Physics, McGill University , 3600 rue University, Montréal, QC H3A 2T8, Canada ; [email protected]; Trottier Space Institute, McGill University , 3550 rue University, Montréal, QC H3A 2A7, Canada; Department of Physics, Carnegie Mellon University , 5000 Forbes Avenue, Pittsburgh, PA 15213, USA
- Shami Chatterjee
- ORCiD
- Department of Astronomy and Cornell Center for Astrophysics and Planetary Science, Cornell University , Ithaca, NY 14853, USA
- Alice P. Curtin
- ORCiD
- Department of Physics, McGill University , 3600 rue University, Montréal, QC H3A 2T8, Canada ; [email protected]; Trottier Space Institute, McGill University , 3550 rue University, Montréal, QC H3A 2A7, Canada
- Matt Dobbs
- ORCiD
- Department of Physics, McGill University , 3600 rue University, Montréal, QC H3A 2T8, Canada ; [email protected]; Trottier Space Institute, McGill University , 3550 rue University, Montréal, QC H3A 2A7, Canada
- Gwendolyn Eadie
- ORCiD
- Dunlap Institute for Astronomy & Astrophysics, University of Toronto , 50 St. George Street, Toronto, ON M5S 3H4, Canada; Department of Statistical Sciences, University of Toronto , 700 University Avenue, Toronto, ON M5G 1Z5, Canada
- B. M. Gaensler
- ORCiD
- Dunlap Institute for Astronomy & Astrophysics, University of Toronto , 50 St. George Street, Toronto, ON M5S 3H4, Canada; David A. Dunlap Department of Astronomy & Astrophysics, University of Toronto , 50 St. George Street, Toronto, ON M5S 3H4, Canada
- Zarif Kader
- ORCiD
- Department of Physics, McGill University , 3600 rue University, Montréal, QC H3A 2T8, Canada ; [email protected]; Trottier Space Institute, McGill University , 3550 rue University, Montréal, QC H3A 2A7, Canada
- Calvin Leung
- ORCiD
- MIT Kavli Institute for Astrophysics and Space Research , Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA; Department of Physics, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, MA 02139, USA
- Kiyoshi W. Masui
- ORCiD
- MIT Kavli Institute for Astrophysics and Space Research , Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA; Department of Physics, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, MA 02139, USA
- Ayush Pandhi
- ORCiD
- Dunlap Institute for Astronomy & Astrophysics, University of Toronto , 50 St. George Street, Toronto, ON M5S 3H4, Canada; David A. Dunlap Department of Astronomy & Astrophysics, University of Toronto , 50 St. George Street, Toronto, ON M5S 3H4, Canada
- Emily Petroff
- ORCiD
- Perimeter Institute for Theoretical Physics , 31 Caroline Street N, Waterloo, ON N25 2YL, Canada
- Ziggy Pleunis
- ORCiD
- Dunlap Institute for Astronomy & Astrophysics, University of Toronto , 50 St. George Street, Toronto, ON M5S 3H4, Canada
- Masoud Rafiei-Ravandi
- ORCiD
- Department of Physics, McGill University , 3600 rue University, Montréal, QC H3A 2T8, Canada ; [email protected]; Trottier Space Institute, McGill University , 3550 rue University, Montréal, QC H3A 2A7, Canada
- Ketan R. Sand
- ORCiD
- Department of Physics, McGill University , 3600 rue University, Montréal, QC H3A 2T8, Canada ; [email protected]; Trottier Space Institute, McGill University , 3550 rue University, Montréal, QC H3A 2A7, Canada
- Paul Scholz
- ORCiD
- Dunlap Institute for Astronomy & Astrophysics, University of Toronto , 50 St. George Street, Toronto, ON M5S 3H4, Canada; Department of Physics & Astronomy, York University , Canada
- Kaitlyn Shin
- ORCiD
- MIT Kavli Institute for Astrophysics and Space Research , Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA; Department of Physics, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, MA 02139, USA
- Kendrick Smith
- ORCiD
- Perimeter Institute for Theoretical Physics , 31 Caroline Street N, Waterloo, ON N25 2YL, Canada
- Ingrid Stairs
- ORCiD
- Department of Physics and Astronomy, University of British Columbia , 6224 Agricultural Road, Vancouver, BC V6T 1Z1, Canada
- DOI
- https://doi.org/10.3847/1538-4357/ad59aa
- Journal volume & issue
-
Vol. 974,
no. 2
p. 274
Abstract
We present the discovery of 12 apparently nonrepeating fast radio burst (FRB) sources, detected by the Canadian Hydrogen Intensity Mapping Experiment (CHIME) telescope. These sources, only one of which has been presented previously in the first CHIME/FRB catalog, were selected from a database comprising ${ \mathcal O }({10}^{3})$ CHIME/FRB full-array raw voltage data recordings, based on their large signal-to-noise ratios and complex morphologies. Our study examines the time-frequency characteristics of these bursts, including drifting, microstructure, and periodicities. The events in this sample display a variety of unique drifting phenomenologies that deviate from the linear negative drifting phenomenon seen in many repeating FRBs, and motivate a possible new framework for classifying drifting archetypes. Additionally, we detect microstructure features of duration ≲50 μ s in seven events, with some as narrow as ≃7 μ s. We find no evidence of significant periodicities between subburst components. Furthermore, we report the polarization characteristics of seven events, including their polarization fractions and Faraday rotation measures (RMs). The observed ∣RM∣ values span a wide range of 17.24(2)–328.06(2) rad m ^−2 , with apparent linear polarization fractions between 0.340(1) and 0.946(3). The morphological properties of the bursts in our sample appear broadly consistent with predictions from both relativistic shock and magnetospheric models of FRB emission, as well as propagation through discrete ionized plasma structures. We address these models and discuss how they can be tested using our improved understanding of morphological archetypes.
Keywords
