Vol 16, No 3 (2016) / Lin

Estimate of an environmental magnetic field of fast radio bursts

Wei-Li Lin, Zi-Gao Dai

Abstract

Fast radio bursts (FRBs) are a type of newly-discovered transient astronomical phenomenon. They have short durations, high dispersion measures and a high event rate. However, due to unknown distances and undetected electromagnetic counterparts at other wavebands, it is difficult to further investigate FRBs. Here we propose a method to study their environmental magnetic field using an indirect method. Starting with dispersion measures and rotation measures (RMs), we try to obtain the parallel magnetic field component \bar{B}_{II} which is the average value along the line of sight in the host galaxy. Because both RMs and redshifts are now unavailable, we demonstrate the dependence of \bar{B}_{II} on these two separate quantities. This result, if the RM and redshift of an FRB are measured, would be expected to provide a clue towards understanding an environmental magnetic field of an FRB.

Keywords


radio continuum: general — pulsars: general — galaxies: magnetic fields — Galaxy: structure

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DOI: https://doi.org/10.1088/1674–4527/16/3/038

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