The relationship between galaxy features at redshift z=0,1,2,4,6, based on TNG100-1 database

Abstract

Contemporarily, in the era of big data, astronomical research also requires a large number of database collection and simulation applications. The TNG project is one of the important database projects. Nowadays, the large-scale galaxy survey IllustrisTNG project has collected a huge number of databases, which makes it easier to understand the characteristics of galaxies, including the mass and size of galaxies, gas mass, star formation rate, circular velocity, black holes, etc. In the development process of the TNG project, a large number of open data packages have been collected. TNG50, TNG100, TNG300 and other data packages contain various data of galaxies, which enables scholars to intuitively study the relationship between various features and quickly generate relationship plots. In this essay, the relationship of the galaxy features (i.e., stellar mass, gas mass and star formation rate) will be discussed based on the TNG100-1 data package on the IllustrisTNG program platform to visualize the relationship under different redshift values. According to the analysis, at different redshift values (z=0,1,2,4,6), there is a close relationship between the three directly, the data distribution plots also show that there is linear-like relationship between their common logarithm values to a certain extent, and can be expressed by series of formula. These results reveal connections between the fundamental properties of galaxies and shed light on guiding further researches of the properties and formation of galaxies.