Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-09-20
Astronomy and Astrophysics
Astrophysics
12 pages, 10 figures. Accepted for publication in RevMexAA vol.42 no. 1, april 2006
Scientific paper
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 Sy 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 [OIII]_5007 - sigma_{star} relation. We find that M_BH = 2.6 x 10^7 M(sun) and M_BH = 8.8 x 10^7 M(sun), respectively.
Benitez Erika
Chavushyan Vahram
Franco-Balderas A.
Torrealba Janet
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