Speaker
Description
In recent years, a class of tidal disruption events (TDEs) with special light curves has been observed: during the luminosity decline phase, they will brighten again and produce a second peak. The interval between the two peaks is only a few hundred days, and the flux of the second peak may become higher or lower than the first peak. There are many models for this phenomenon in the literature, one of which is that it is due to the same star experiencing two partial disruptions (partial TDE). If we simply apply the existing fitting software to this type of light curve, the following problems will arise: (1) Both peaks need to be fitted separately, and it is not possible to process the contribution of the first peak's decline phase to the second peak; (2) The star is on a parabolic orbit, and even if it is not completely destroyed, a second TDE will not occur. We try to address these two issues and construct a new light curve model, as well as develop corresponding fitting code. We have applied this fitting code to a few TDEs with re-brightening features. Finally, we will briefly discuss other applications of our model.