Abstract
The structure and composition of the stellar population in the surface brightness galaxy Ic 467 is studied using BVR CCD photometry. The observations were obtained on the 1.88m 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 and the surface brightness of the eastern arms in V filter is brighter than the western arm. From the observations, the surface brightness profiles, Ellipticity profiles, position angle profiles and color indices profiles are described and studied.
Highlights
Spiral galaxies consist of distinct building blocks; disk, bulge, and dark halo
The Hubble sequence is basically a sequence of the disk to bulge ratio which can be estimated by the surface photometry of galaxies
The main reduction steps included flat fielding and correction for the CCD bias; removal of cosmic-ray traces; subtraction of the sky background for each image; superposition of the galaxy images using reference stars; addition of the galaxy images made in a single filter; corrections for differences of the instrumental photometric system from the standard Johnson–Cousins system and the air mass; and subtraction of the galaxy images made in different filters in order to obtain color-index maps[5]
Summary
Spiral galaxies consist of distinct building blocks; disk, bulge, and dark halo. The Hubble sequence is basically a sequence of the disk to bulge ratio which can be estimated by the surface photometry of galaxies. The goal of a surface photometry process to find out the structure of galaxies by morphological type[2]. Ic 467is among the most interesting nearby galaxies, and worthy of detailed study. It is a nearby, relatively small galaxy with a low surface brightness and two bright symmetrical spiral arms branch in the outer disk of Ic 467, forming several long extended arms [3].
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