A shared law between sources of repeating fast radio bursts

Mohammed A. Chamma, Fereshteh Rajabi, Christopher M. Wyenberg, Abhilash Mathews, Martin Houde

Published 2020-10-27Version 1

We study the spectro-temporal characteristics of two repeating fast radio bursts (FRBs), namely, FRB~180916.J0158+65 and FRB~180814.J0422+73, and combine the results with those from our earlier analysis on FRB~121102. The relationship between the frequency drift rate of individual sub-bursts and their temporal duration is investigated. We verify the existence of the inverse scaling law between the two parameters previously predicted using a simple dynamical relativistic model for all sources. The remarkably similar behavior observed in all sources provides strong evidence that a single and common underlying physical phenomenon is responsible for the emission of signals from these three FRBs, despite their associations with different types of host galaxies at various redshifts. It also opens up the possibility that this sub-burst drift law may be a universal property among repeating FRBs, or at least for a significant subclass among them.