Observations of the γ-ray-emitting narrow-line Seyfert 1, SBS 0846+513, and its host galaxy
Date Issued
2021
Author(s)
Timothy S. Hamilton
•
Marco Berton
•
Sonia Antón
•
•
•
Stefano Ciroi
•
Wolfgang Gässler
•
Iskren Georgiev
•
Emilia Järvelä
•
S. Komossa
•
Smita Mathur
•
Sebastian Rabien
Abstract
The gamma-ray emitting galaxy SBS 0846+513 has been classified as a
Narrow-Line Seyfert 1 from its spectroscopy, and on that basis it was thought
likely to have a small central black hole hosted in a spiral galaxy. But very
few of the gamma-ray Narrow-Line Seyfert 1s have high-resolution imaging of
their hosts, so it is unknown how those expectations hold up for the
gamma-emitting class. We have observed this galaxy in the J-band with the Large
Binocular Telescope's LUCI1 camera and the ARGOS adaptive optics system. We
estimate its black hole mass to lie between $7.70 \leq \log
\frac{\text{M}}{\text{M}_\odot} \leq 8.19$, using the correlation with bulge
luminosity, or $7.96 \leq \log \frac{\text{M}}{\text{M}_\odot} \leq 8.16$ using
the correlation with S\'{e}rsic index, putting its mass at the high end of the
Narrow Line Seyfert 1 range. These estimates are independent of the Broad Line
Region viewing geometry and avoid underestimates due to looking down the jet
axis. Its host shows evidence of a bulge + disc structure, both from
two-dimensional modeling and isophote shape, in keeping with the expectations.
Mergers and interactions appear to be common among the gamma-ray Narrow-Line
Seyfert 1s, and we see some circumstantial evidence for companion galaxies or
disturbed features in the host.
Volume
504
Issue
4
Start page
5188
Issn Identifier
0035-8711
Rights
open.access
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