PREPRINT
A22366B1-F053-44B7-9FF6-71C081B1076C

Modeling the flare in NGC 1097 from 1991 to 2004 as a tidal disruption event

Zhang XueGuang

Submitted on 19 September 2022

Abstract

In the Letter, interesting evidence is reported to support a central tidal disruption event (TDE) in the known AGN NGC 1097. Considering the motivations of TDE as one probable origination of emission materials of double-peaked broad emission lines and also as one probable explanation to changing-look AGN, it is interesting to check whether are there clues to support a TDE in NGC 1097, not only a changing-look AGN but also an AGN with double-peaked broad emission lines. Under the assumption that the onset of broad H$\alpha$ emission was due to a TDE, the 13years-long (1991-2004) variability of double-peaked broad H$\alpha$ line flux in NGC 1097 can be well predicted by theoretical TDE model, with a $\left(1-1.5\right){\mathrm{M}}_{\odot }$ main-sequence star tidally disrupted by the central BH with TDE model determined mass about $\left(5-8\right)×{10}^{7}{\mathrm{M}}_{\odot }$. The results provide interesting evidence to not only support TDE-related origin of double-peaked broad line emission materials but also support TDE as an accepted physical explanation to physical properties of changing-look AGN.

Preprint

Comment: 5 pages, 3 figures, 1 table, Accepted to be published in MNRAS Letter

Subjects: Astrophysics - Astrophysics of Galaxies; Astrophysics - High Energy Astrophysical Phenomena