Past Event

Delayed Radio Flares from Tidal Disruption Events

September 28, 2023
4:05 PM - 4:35 PM
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Pupin 1402

Seminar by Itai Sfaradi, Hebrew University

Tidal Disruption Events (TDEs), the disruption of stars by the tidal forces of a Super-Massive Black Hole (SMBH), are offering a unique real-time opportunity to examine processes related to SMBHs and their interaction with their environments. So far, radio observations of TDEs revealed diverse properties, from the formation of relativistic jets to the interaction of an outflow material with the CNM, and even a possible association with neutrino emission. A recently discovered phenomenon in radio wavelengths is the emergence of late-time radio flares. It is still unclear whether the emission mechanism for such delayed radio flares is a delayed ejection of outflow material, a narrow jet that is misaligned with our line of sight, or something else entirely. I will review the recent discoveries in this field, and present our unique sets of radio observations of several TDEs with delayed radio flares. I will also discuss our interpretation of some of these flares in the context of a new theoretical framework for relativistic jets observed off-axis.

Host: Itai Linial