Abstract Details
| Name: Rupak Roy Affiliation: IUCAA, Pune Conference ID: ASI2018_880 Title : The Nuclear-transients Authors and Co-Authors : Not applicable Abstract Type : Contributed Talk Abstract Category : Extragalactic astronomy Abstract : Recent trend in "time domain astronomy" has found several new kinds of transients which are located very near to the centers of the galaxies. Most of them are much brighter than canonical supernovae and exhibit very broad lightcurves with almost featureless spectra. Most of the times these have been explained as Tidal Disruption Events (TDE) which are probably produced due to complete disruption of massive stars by the supermassive black hole (SMBH) at the center of their hosts. Certainly the proposed mechanism for TDEs is completely different from that of canonical core-collapse supernovae (CCSNe) and also different from that of Superluminous Supernovae (SLSNe) which are supposed to be either powered by shock-interaction or pair-instability processes or by a spin-down magnetar. The improved SN surveys now also discovered that these nuclear-transients can exhibit photometric and spectroscopic properties some-extent similar to both TDEs and CCSNe. They are more energetic with broader and luminous light curves than canonical CCSNe. Here, I shall describe the photometric and spectroscopic properties of such transients and compare their properties with those of TDEs and CCSNe and shall discuss about the possible progenitor scenario. |