Origins And Evolution Of Galactic Type Diversity

摘要

A study is presented into the origins of galactic type diversity and galaxy evolution through investigating the relationship between representative galaxy color index u-v and redshifts. A sample of 385,075 galaxies with redshifts 0.2z3.5 through absorption filters U and V, as provided by the COSMOS Deep-Sky Survey Public Database, is analyzed. After identifying and removing effects of redshifts on spectra, an approximationof the Friedmann Equation is used to determine galaxy distance, which is then applied to compare samples by absolute magnitude. It is concluded that galaxy type diversity in relation to star formation rates originates at approximately z=2, or 6.3 billion yearsafter the Big Bang.