The Astrophysical Journal (Jan 2023)
Revealing the Dynamic Magnetoionic Environments of Repeating Fast Radio Burst Sources through Multiyear Polarimetric Monitoring with CHIME/FRB
- R. Mckinven,
- B. M. Gaensler,
- D. Michilli,
- K. Masui,
- V. M. Kaspi,
- J. Su,
- M. Bhardwaj,
- T. Cassanelli,
- P. Chawla,
- F. (Adam) Dong,
- E. Fonseca,
- C. Leung,
- D. Z. Li,
- C. Ng,
- C. Patel,
- A. B. Pearlman,
- E. Petroff,
- Z. Pleunis,
- M. Rafiei-Ravandi,
- M. Rahman,
- K. R. Sand,
- K. Shin,
- I. H. Stairs,
- S. Tendulkar
Affiliations
- R. Mckinven
- ORCiD
- Department of Physics, McGill University , 3600 rue University, Montréal, QC, H3A 2T8, Canada ; [email protected]; McGill Space Institute, McGill University , 3550 rue University, Montréal, QC, H3A 2A7, Canada; 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
- 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
- D. Michilli
- ORCiD
- Department of Physics, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, MA 02139, USA; MIT Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, MA 02139, USA
- K. Masui
- ORCiD
- Department of Physics, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, MA 02139, USA; MIT Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, MA 02139, USA
- V. M. Kaspi
- ORCiD
- Department of Physics, McGill University , 3600 rue University, Montréal, QC, H3A 2T8, Canada ; [email protected]; McGill Space Institute, McGill University , 3550 rue University, Montréal, QC, H3A 2A7, Canada
- J. Su
- ORCiD
- Department of Physics, McGill University , 3600 rue University, Montréal, QC, H3A 2T8, Canada ; [email protected]
- M. Bhardwaj
- ORCiD
- Department of Physics, McGill University , 3600 rue University, Montréal, QC, H3A 2T8, Canada ; [email protected]; McGill Space Institute, McGill University , 3550 rue University, Montréal, QC, H3A 2A7, Canada
- T. Cassanelli
- 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
- P. Chawla
- ORCiD
- Anton Pannekoek Institute for Astronomy, University of Amsterdam , Science Park 904, 1098 XH Amsterdam, The Netherlands
- F. (Adam) Dong
- ORCiD
- Dept. of Physics and Astronomy , 6224 Agricultural Road, Vancouver, BC, V6T 1Z1, Canada
- E. Fonseca
- ORCiD
- Lane Department of Computer Science and Electrical Engineering , 1220 Evansdale Drive, P.O. Box 6109 Morgantown, WV 26506, USA; Center for Gravitational Waves and Cosmology, West Virginia University , Chestnut Ridge Research Building, Morgantown, WV 26505, USA; Department of Physics and Astronomy, West Virginia University , P.O. Box 6315, Morgantown, WV 26506, USA
- C. Leung
- ORCiD
- Department of Physics, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, MA 02139, USA; MIT Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, MA 02139, USA
- D. Z. Li
- ORCiD
- Cahill Center for Astronomy and Astrophysics, California Institute of Technology , 1216 E California Boulevard, Pasadena, CA 91125, USA
- C. Ng
- ORCiD
- Dunlap Institute for Astronomy & Astrophysics, University of Toronto , 50 St. George Street, Toronto, ON, M5S 3H4, Canada
- C. Patel
- 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
- A. B. Pearlman
- ORCiD
- Department of Physics, McGill University , 3600 rue University, Montréal, QC, H3A 2T8, Canada ; [email protected]; McGill Space Institute, McGill University , 3550 rue University, Montréal, QC, H3A 2A7, Canada
- E. Petroff
- ORCiD
- Department of Physics, McGill University , 3600 rue University, Montréal, QC, H3A 2T8, Canada ; [email protected]; McGill Space Institute, McGill University , 3550 rue University, Montréal, QC, H3A 2A7, Canada; Anton Pannekoek Institute for Astronomy, University of Amsterdam , Science Park 904, 1098 XH Amsterdam, The Netherlands
- Z. Pleunis
- ORCiD
- Dunlap Institute for Astronomy & Astrophysics, University of Toronto , 50 St. George Street, Toronto, ON, M5S 3H4, Canada
- M. Rafiei-Ravandi
- ORCiD
- Department of Physics, McGill University , 3600 rue University, Montréal, QC, H3A 2T8, Canada ; [email protected]; McGill Space Institute, McGill University , 3550 rue University, Montréal, QC, H3A 2A7, Canada
- M. Rahman
- ORCiD
- Sidrat Research , P.O. Box 73527 RPO Wychwood, Toronto, ON, M6C 4A7, Canada
- K. R. Sand
- ORCiD
- Department of Physics, McGill University , 3600 rue University, Montréal, QC, H3A 2T8, Canada ; [email protected]; McGill Space Institute, McGill University , 3550 rue University, Montréal, QC, H3A 2A7, Canada
- K. Shin
- ORCiD
- Department of Physics, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, MA 02139, USA; MIT Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, MA 02139, USA
- I. H. Stairs
- ORCiD
- Dept. of Physics and Astronomy , 6224 Agricultural Road, Vancouver, BC, V6T 1Z1, Canada
- S. Tendulkar
- ORCiD
- Department of Astronomy and Astrophysics, Tata Institute of Fundamental Research , Mumbai, 400005, India; National Centre for Radio Astrophysics , Post Bag 3, Ganeshkhind, Pune, 411007, India
- DOI
- https://doi.org/10.3847/1538-4357/acd188
- Journal volume & issue
-
Vol. 951,
no. 1
p. 82
Abstract
Fast radio bursts (FRBs) display a confounding variety of burst properties and host-galaxy associations. Repeating FRBs offer insight into the FRB population by enabling spectral, temporal, and polarimetric properties to be tracked over time. Here, we report on the polarized observations of 12 repeating sources using multiyear monitoring with the Canadian Hydrogen Intensity Mapping Experiment (CHIME) over 400–800 MHz. We observe significant rotation measure (RM) variations from many sources in our sample, including RM changes of several hundred radians per square meter over month timescales from FRBs 20181119A, 20190303A, and 20190417A, and more modest RM variability (ΔRM ≲ few tens of radians per square meter) from FRBs 20181030A, 20190208A, 20190213B, and 20190117A over equivalent timescales. Several repeaters display a frequency-dependent degree of linear polarization that is consistent with depolarization via scattering. Combining our measurements of RM variations with equivalent constraints on DM variability, we estimate the average line-of-sight magnetic field strength in the local environment of each repeater. In general, repeating FRBs display RM variations that are more prevalent and/or extreme than those seen from radio pulsars in the Milky Way and the Magellanic Clouds, suggesting repeating FRBs and pulsars occupy distinct magnetoionic environments.
Keywords
