Abstract
The goal of our study is to perform detailed multiband surface photometry of the spiral galaxy NGC 4448 and its brightest star-forming regions. The structure and composition of the stellar population in the surface brightness galaxy NGC 4448 was studied using BVR CCD photometry. The observations were obtained on the 1.88 m optical telescope of Kottamia Astronomical Observatory (KAO), Egypt. A two-dimensional decomposition of the galaxy bulge and disk components is carried out. A powerful star forming region is observed near the galactic center. Based on the positions of the various components of the galaxy in two color diagrams. From the observations, the surface brightness profiles, Ellipticity profiles, position angle profiles and color indices profiles are described and studied.
Highlights
The surface photometry of galaxies provides the fundamental and essential information for the study of their structures and dynamics
We performed the multiband surface photometry of galaxies with a CCD camera equipped on 1.88 m optical telescope of Kottamia Astronomical Observatory (KAO) Egypt
Surface photometry is an important tool in the understanding of galaxy mass and structure
Summary
The surface photometry of galaxies provides the fundamental and essential information for the study of their structures and dynamics. Most of the current knowledge about the structure of galaxies came from the analysis of the photographic plates This technique has been enhanced by the replacement of digital imaging. In order to obtain images of objects at different wavelengths for photometric study, a series of filters are introduced into the light path of the instrument being used. In order to be scientifically useful for the resultant images, it is important that a standard set of filters be used. Obtaining the structural characteristics and the total luminosity of a galaxy requires knowledge of a surface brightness profile. The images of galaxies NGC 4448 is recorded on CCD camera using B, V and R filters. Fig. represents the photometric profiles along the major axis of the galaxy NGC 4448 using B, V and R filters which are symmetric about the center. The color indices in the bar for (B-V) is 1.05 mag, and for (V-R) is 0.77 mag
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