The Relation between Large Scale Structure and Properties ofGalaxies : Investigation of Large &; Small Scale Environments onOptical Properties of Galaxies

• Main Authors: Cheng, Shou-Lun, 鄭守倫
• Other Authors: Hashimoto, Yasuhiro
• Format: Others
• Language: en_US
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/3p8m6z

碩士 === 國立臺灣師範大學 === 地球科學系 === 103 === We are conducting the investigation of the relationship between large-scale structure and the kinematic &; photometric properties of galaxies, using spectroscopic catalog from Sloan Digital Sky Survey Data Release 8 (SDSS dr8). In large scale, galaxies are not distributed randomly, but lying inside the large-scale structure, such as, sheets, filaments, webs, and voids. This variation of the location should provide various environments for each galaxy to form and evolve. Since the properties of galaxies are known to correlated with their environments, investigations of the relationship between the galaxies properties and the large- &; small-scale environments should provide precious additional constraints for understanding the formation and evolution of galaxies, beyond well known environmental effect of smaller scale, such as the effect of local galaxy density. We have developed quantitative methods to objectively characterize the large-scale structure of the universe surrounding galaxies, to quantitatively investigate the relation between the properties of galaxies and their large-scale environments. Our methods characterized the large-scale environments by various measures such as ’Multi-Axis Density (MAD)’, ’Large-Scale-Filament Factor (LSFF)’, and ’Small-Scale-Filament Factor (SSFF)’. Our goal is to understand the difference of galaxies in different environments by investigating the relation between the kinematic &; photometric properties of galaxies and their large- &; small-scale environments. Key words: Environment, Filament, Galaxy, Large-Scale Structure, SDSS, Void