February 20
TDE 2025abcr: A Tidal Disruption Event in the Outskirts of a Massive Galaxy
Robert Stein, JSI
Abstract: Tidal disruption events (TDEs) have traditionally been discovered in optical sky surveys through targeted searches of nuclear transients. However, it is expected that some TDEs will occur outside the galaxy nucleus, arising from wandering black holes originating in galaxy mergers. I will discuss TDE 2025abcr, the first optical TDE discovered in the outskirts of a host galaxy. The TDE was identified by a custom `offnuclear' implementation of the ML classifier tdescore, which classifies new ZTF transients based on their lightcurves.
Host: Jillian Chin Rastinejad & Robert Stein