Morphological Distribution of Galaxies in Some Nearby Clusters

Baltic astronomy

article

Mariwan A. Rasheed¹  Khalid K. Mohammad¹ 

[1] Department of Physics, College of Science, University of Sulaimani;Development Center for Research and Training, University of Human Development

关键词: galaxy clusters;    galaxy morphology;   

DOI  :  10.1515/astro-2019-0007

来源: Institute of Theoretical Physics and Astronomy

【 摘 要 】

We study the morphological distribution of galaxies in some nearby clusters, using the Sloan Digital Sky Survey – Data Release 9 (SDSS-DR9). The segregation between early-type galaxies and late-type ones is investigated in g – r / u – g color space, using the color cut u – r = 2.22. The results are compared with those obtained using a color cut that changes with magnitude. They are found to be consistent, particularly for late-type galaxies. The results obtained by the fixed color-cut criterion are also found to be consistent with those obtained by the inverse concentration index parameter, especially for early-type galaxies. Comparable results are obtained for the stacked sample, whose morphologies, given by the fixed color-cut criterion are compared with the visual morphologies provided by the Galaxy Zoo project. A good degree of consistency is seen, which becomes more evident for late-type galaxies.

【 授权许可】

Unknown