SIMBAD references

2020ApJ...899...82B - Astrophys. J., 899, 82-82 (2020/August-2)

The discovery of a hidden broad-line AGN in a bulgeless galaxy: Keck NIR spectroscopic observations of SDSS J085153.64+392611.76.


Abstract (from CDS):

We report the discovery of a buried, active supermassive black hole (SMBH) in SDSS J085153.64+392611.76, a bulgeless Seyfert 2 (Sy2) galaxy. Keck near-infrared observations reveal a hidden broad-line region, allowing for the rare case where strong constraints can be placed on both the BH mass and bulge component. Using virial mass estimators, we obtain a BH mass of log(MBH/M) = 6.78 ± 0.50. This is one of the only Sy2 active galactic nuclei (AGNs) hosted in a bulgeless galaxy with a virial BH mass estimate and could provide important constraints on the formation scenarios of the BH seed population. The lack of a bulge component suggests that the SMBH has grown quiescently, likely caused by secular processes independent of major mergers. In the absence of a detectable bulge component, we find the MBH-Mstellar relation to be more reliable than the MBH-Mbulge relation. In addition, we detect extended narrow Paα emission that allows us to create a rotation curve where we see counterrotating gas within the central kiloparsec. Possible causes of this counterrotation include a galactic bar or disruption of the inner gas by a recent fly-by of a companion galaxy. This in turn could have triggered accretion onto the central SMBH in the current AGN phase.

Abstract Copyright: © 2020. The American Astronomical Society. All rights reserved.

Journal keyword(s): Active galactic nuclei - Near infrared astronomy - Galaxy bulges - Seyfert galaxies - Supermassive black holes

VizieR on-line data: <Available at CDS (J/ApJ/899/82): tablec1.dat tablec2.dat tablec3.dat tablec4.dat>

Simbad objects: 180

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