Morphology and Structures of Nearby Dwarf Galaxies

摘要

We applied GALFIT and STARLIGHT to the r-band images and spectra, respectively, of~ 1, 100 dwarf galaxies to analyze the structural properties and stellar populations. In most cases, single component with n= 1~ 1.5 well describes the luminosity distribution of dwarf galaxies. However, a large fraction of dSO, dE_(bc), and dE_(blue) galaxies show sub-structures such as spiral arms and rings. There is a bimodal distributions of stellar ages in dSO galaxies. But other sub-types of dwarf galaxies show a single peak in the stellar distributions.