Study On The Evolution Of S0 Galaxies

The position of S0 galaxies is between Elliptical galaxies and Spiral galaxies in the Hubble Tuning Fork,and their properties are also between them.In terms of morphology,the ellipticity of S0 galaxies is between them.Compared with Spiral galaxies,S0 galaxies have no spiral arm structure;The gas content and star formation rate are relatively lower,and they look red,which is closer to Elliptical galaxies.This intermediate state is conducive to exploring the evolution of different galaxies,which can be realized by analyzing the formation path of S0 galaxies.This paper aims to explore the evolution of S0 galaxies by analyzing the relationship between Galaxy's large-scale environment(Knot,Filament,Sheet,and Void),Galaxy structure(S érsic index,stellar mass),and Galaxy morphology(S0 and un S0 galaxies),color and Galaxy activity(star formation rate).The data used in this paper comes from GAMA DR3.2830 sources are selected,which can ensure the completeness of the samples up to 99.79%.In order to further analyze the properties of S0 galaxies,the samples are divided into six subsamples for comparative analysis according to the classification in terms of galaxy evolution and galaxy morphology.In this process,the star-forming galaxies in the sample are separated according to the UVJ diagram,and the WISE W3 band method is used to estimate the star formation rate.Fitting the main sequence line(MS)of star-forming galaxies,blue cloud galaxies are above MS-0.45 dex,red sequence galaxies are below MS-0.9dex,and green valley galaxies are among them.Six subsamples are obtained and their properties are statistically analyzed in this work,including 725 lens galaxies.By analyzing the proportion of S0 galaxies and the distribution of red sequence and blue cloud galaxies with different masses in different environments,it is found that the different proportion of S0 galaxies in the blue cloud galaxies and the red sequence galaxies may be affected by the synergy of galaxy mass and environment.The statistical results of the galaxy structure are in line with expectations.Among them,the S érsic index of S0 galaxies belonging to the red sequence is the largest,the S érsic index of S0 galaxies belonging to the blue cloud is the smallest,the S érsic index of S0 galaxies of the green valley galaxies and blue cloud galaxies is higher than that of un S0 galaxies,and the S0 galaxies in the red sequence galaxies are slightly lower than that of un S0 galaxies,and the statistical analysis of Galaxy size and mass is consistent with it.The statistical analysis of galaxies in different environments shows that with the increase of environmental density,the proportion of S0 galaxies distributed in the red sequence decreases and the proportion of S0 galaxies in the green valley increases,which may suggest that the effects of several formation paths of S0 galaxies are different in different dense environments.Under different environments,with the increase of environmental density,the proportion of the red sequence galaxies distributed in S0 galaxies and the green valley galaxies in S0 galaxies gradually increases respectively,and the proportion of the blue cloud galaxies in S0 galaxies gradually decreases.Compared with the proportion of the red sequence,the green valley and the blue cloud galaxies in all galaxies under different environments,it is found that both trends is consistent,which shows that the denser the environment of star systems,the easier it is for galaxies to quench.