Recently, radio emission from tidal disruption events (TDEs) has been observed from months to years after the optical discovery. Some of the TDEs including ASASSN-14ae, ASASSN-15oi, AT 2018hyz, and AT 2019dsg are accompanied by the late-time rebrightening phase characterized by a rapid increase in the radio flux. We show that it can be explained by the off-axis two-component jet model, in which the late-time rebrightening arises from the off-axis view of a decelerating narrower jet with an initial Lorentz factor of ~10 and a jet opening angle of ~0.1 rad, while the early-time radio emission is attributed to the off-axis view of a wider jet component. We also argue that the rate density of jetted TDEs inferred from these events is consistent with the observations.
@article{arxiv.2404.13326,
title = {Two-component off-axis jet model for radio flares of tidal disruption events},
author = {Yuri Sato and Kohta Murase and Mukul Bhattacharya and Jose Carpio and Mainak Mukhopadhyay and B. Theodore Zhang},
journal= {arXiv preprint arXiv:2404.13326},
year = {2024}
}
Comments
8+2 pages, 2+2 figures, 1 table, accepted for publication in PRDL