Journal
ASTROPHYSICAL JOURNAL
Volume 927, Issue 1, Pages -Publisher
IOP Publishing Ltd
DOI: 10.3847/1538-4357/ac49e1
Keywords
-
Categories
Funding
- Canada Foundation for Innovation (CFI) 2012 Leading Edge Fund [31170]
- CFI 2015 Innovation Fund [33213]
- Dunlap Institute for Astronomy and Astrophysics at the University of Toronto
- Canadian Institute for Advanced Research (CIFAR), McGill University
- Government of Canada through Industry Canada
- Province of Ontario through the Ministry of Research Innovation
- NSERC Discovery Grant
- Canadian Institute for Advanced Research
- FRQNT Doctoral Research Award
- Herzberg Award
- FRQNT Centre de Recherche en Astrophysique du Quebec
- NSF Physics Frontiers Center [1430284]
- NSERC Discovery Grant [RGPIN-2015-05948]
- Canada Research Chairs (CRC) program
- US Department of Defense (DoD) through the National Defense Science & Engineering Graduate Fellowship (NDSEG) Program
- NSF Grant [2008031]
- NSERC PGS-D award
- NWO Veni Fellowship
- NSF Graduate Research Fellowship Program
- province of British Columbia
- province of Quebec
- province of Ontario
- David Dunlap family
- University of Toronto
- Lorne Trottier Chair in Astrophysics Cosmology
- R. Howard Webster Foundation Fellowship from the Canadian Institute for Advanced Research (CIFAR)
- Division Of Astronomical Sciences
- Direct For Mathematical & Physical Scien [2008031] Funding Source: National Science Foundation
Ask authors/readers for more resources
We present a Monte Carlo-based population synthesis study on fast radio burst (FRB) dispersion and scattering. By comparing simulated distributions with the CHIME/FRB catalog, we show that the interstellar medium alone cannot explain the observed scattering timescales. We introduce additional sources of scattering and find that a population of FRBs with scattering from these sources is marginally consistent with the catalog.
We present a Monte Carlo-based population synthesis study of fast radio burst (FRB) dispersion and scattering focusing on the first catalog of sources detected with the Canadian Hydrogen Intensity Mapping Experiment Fast Radio Burst (CHIME/FRB) project. We simulate intrinsic properties and propagation effects for a variety of FRB population models and compare the simulated distributions of dispersion measures and scattering timescales with the corresponding distributions from the CHIME/FRB catalog. Our simulations confirm the results of previous population studies, which suggested that the interstellar medium of the host galaxy alone (simulated based on the NE2001 model) cannot explain the observed scattering timescales of FRBs. We therefore consider additional sources of scattering, namely, the circumgalactic medium (CGM) of intervening galaxies and the circumburst medium whose properties are modeled based on typical Galactic plane environments. We find that a population of FRBs with scattering contributed by these media is marginally consistent with the CHIME/FRB catalog. In this scenario, our simulations favor a population of FRBs offset from their galaxy centers over a population that is distributed along the spiral arms. However, if the models proposing the CGM as a source of intense scattering are incorrect, then we conclude that FRBs may inhabit environments with more extreme properties than those inferred for pulsars in the Milky Way.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available