Abstract

TORREALBA, J.; BENITEZ, E.; FRANCO-BALDERAS, A.  and  CHAVUSHYAN, V. H.. Optical Photometry and Spectroscopy of the Seyfert Galaxy SBS 0748+499. Rev. mex. astron. astrofis [online]. 2006, vol.42, n.1, pp.3-13. ISSN 0185-1101.

We present the first optical photometric study of the active galaxy SBS 0748+499. First, we present B, V, R, and I photometric data: total magnitudes and B — V, B — R, B — I colors; surface brightness, color and geometric profiles, with emphasis on the morphology and its relation to the global photometric properties of this galaxy. Then, from our surface photometry study we derive the bulge-to-disk luminosity ratio B/D in the four bands. We find that the host galaxy shows a bar (a ~ 8 kpc) and a low-brightness spiral structure. The morphological classification for the host galaxy of this AGN is SBab. Additionally, we present new optical spectrophotometric observations that clearly show that the object can be classified as a Seyfert 1.9 galaxy. Finally, we estimate the black hole mass (M_BH) associated with the nucleus of SBS 0748+499 using the absolute R-band bulge magnitude —M_BH relation, and the FWHM [O III]₅₀₀₇— σ_* relation. We find that M_BH = 2.6 x 10⁷ M_Θ y M_BH = 8.8 x 10⁷ M_Θ, respectively.

Keywords : GALAXIES [ACTIVE]; GALAXIES [SEYFERT]; GALAXIES [PHOTOMETRY]; GALAXIES [INDIVIDUAL (SBS 0748+499)].