Use of fast radio burst dispersion measures as distance measures

Fast radio bursts appear to be cosmological signals whose frequency-time structure provides a dispersion measure. The dispersion measure is a convolution of the cosmic distance element and the electron density, and contains the possibility of using these events as new cosmological distance measures....

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Bibliographic Details
Published in:Physical review. D 2019-10, Vol.100 (8), Article 083533
Main Authors: Kumar, Pawan, Linder, Eric V.
Format: Article
Language:English
Subjects:
Convolution
Dispersion
Distance measurement
Electron density
Ionization
Mapping
Plasma
Radio bursts
Variations
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Summary:Fast radio bursts appear to be cosmological signals whose frequency-time structure provides a dispersion measure. The dispersion measure is a convolution of the cosmic distance element and the electron density, and contains the possibility of using these events as new cosmological distance measures. We explore the challenges of extracting the distance in a robust manner, and give quantitative estimates for the systematics control needed for fast radio bursts to become a competitive distance probe. The methodology can also be applied to assessing their use for mapping electron density fluctuations or helium reionization.
ISSN:2470-0010
2470-0029
DOI:10.1103/PhysRevD.100.083533