Observations of the γ-ray-emitting narrow-line Seyfert 1, SBS 0846+513, and its host galaxy

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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Monthly Notices of the Royal Astronomical Society, Volume 504, issue 4
The γ-ray-emitting galaxy SBS 0846+513 has been classified as a narrow-line Seyfert 1 (NLS1) from its spectroscopy, and on that basis would be thought likely to have a small central black hole hosted in a spiral galaxy. However, very few of the γ-ray NLS1s have high-resolution imaging of their hosts, so it is unknown how the morphology expectation holds up for the γ-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 $4.2\times 10^7 \le \frac{\rm{\it{ M}}}{\text{M}_\odot } \le 9.7\times 10^7$, using the correlation with bulge luminosity, or $1.9\times 10^7 \le \frac{\rm{\it{ M}}}{\text{M}_\odot } \le 2.4\times 10^7$ using the correlation with Sérsic index. Our favoured estimate is 4.2 × 107 M⊙, putting its mass at the high end of the NLS1 range in general but consistent with others that are γ-ray emitters. These estimates are independent of the broad-line region viewing geometry and avoid any underestimates due to looking down the jet axis. Its host shows evidence of a bulge + disc structure, from the isophote shape and residual structure in the nuclear-subtracted image. This supports the idea that γ-ray NLS1 may be spiral galaxies, like their non-jetted counterparts.
Funding Information: SA acknowledges financial support from the Centre for Research and Development in Mathematics and Applications (CIDMA) strategic project UID/MAT/04106/2019 and from Enabling Green E-science for the Square Kilometre Array Research Infrastructure (ENGAGESKA), POCI-01-0145-FEDER-022217, funded by the Programa Operacional Competitividade e Internacionalizacao (COMPETE 2020) and Fundacao para a Ciencia e Tecnologia (FCT), Portugal Publisher Copyright: © 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society.
Galaxies: active, Galaxies: Seyfert, Instrumentation: adaptive optics, Quasars: supermassive black holes
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Hamilton, T S, Berton, M, Antón, S, Busoni, L, Caccianiga, A, Ciroi, S, Gässler, W, Georgiev, I Y, Järvelä, E, Komossa, S, Mathur, S & Rabien, S 2021, ' Observations of the γ-ray-emitting narrow-line Seyfert 1, SBS 0846+513, and its host galaxy ', Monthly Notices of the Royal Astronomical Society, vol. 504, no. 4, pp. 5188-5198 . https://doi.org/10.1093/mnras/stab1046