Speaker
Description
Fast Radio Bursts (FRBs) often exhibit a downward frequency drift, known as the sad-trombone effect, even after removing dispersion. The physical origin of this phenomenon remains unclear and may arise from either intrinsic emission processes or propagation effects. In this work, we apply a plasma lensing model to investigate whether frequency-dependent propagation can account for the observed drift. By solving the lens equation and modeling the associated arrival-time delays, we construct a frequency-dependent correction function to realign the burst signal. Applying this method to FRB data, we find that the best-fit drift slopes are reduced after correction. These results suggest that plasma lensing may contribute to the observed time–frequency structure of FRBs and provides a physically motivated framework for interpreting propagation-induced effects.
| Participate the oral/poster presentation award competition | Yes |
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