SIMBAD references

2021MNRAS.507.6196I - Mon. Not. R. Astron. Soc., 507, 6196-6204 (2021/November-2)

Host galaxy line diagnostics for the candidate tidal disruption events XMMSL1 J111527.3+180638 and PTF09axc.


Abstract (from CDS):

We present results of our analysis of spectra of the host galaxies of the candidate tidal disruption events (TDEs) XMMSL1 J111527.3+180638 and PTF09axc to determine the nature of these transients. We subtract the starlight component from the host galaxy spectra to determine the origin of the nuclear emission lines. Using a Baldwin-Phillips-Terlevich (BPT) diagram, we conclude that the host galaxy of XMMSL1 J111527.3+180638 is classified as a Seyfert galaxy, suggesting this transient is likely to be caused by (extreme) variability in the active galactic nucleus. We find that the host of PTF09axc falls in the 'star-forming' region of the BPT diagram, implying that the transient is a strong TDE candidate. For both galaxies, we find a WISE colour difference of W1 - W2 < 0.8, which means there is no indication of a dusty torus and therefore an active galactic nucleus, seemingly contradicting our BPT finding for the host of XMMSL1 J111527.3+180638. We discuss possible reasons for the discrepant results obtained through these two methods.

Abstract Copyright: © 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): black hole physics - galaxies: active - galaxies: individual: NGC 3599 - galaxies: nuclei - transients: tidal disruption events

Simbad objects: 12

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