The Study Of The Properties And Evolution Of The Low Surface Brightness Galaxies In CANDELS

Low surface brightness?hereafter,LSB?galaxies are characterized by a central surface brightness at least one magnitude fainter than the night sky.Investigating the properties of LSB galaxies is helpful to understand the formation and evolution of galaxies.However,due to the characteristic of LSB galaxies,it is difficult to detect and study a large sample of distant LSB galaxies.In this thesis,we select a sample of?14,000 disk-dominated galaxies with stellar mass M_*>10^7.7M_?between redshift 0 and 1 in all five CANDELS fields.We for the first time study the evolution of disk central surface brightness over cosmic time.Furthermore,we divide our galaxies into the LSB,i.e.,fainter than average for its mass,and HSB disk galaxies,i.e.,brighter than average.We make a comparison between the LSB and HSB disk galaxies in detail.Main results are shown as follows:?1?The relation between disk central surface brightness??₀?and stellar mass?logM_*? can be better fitted by a 2-order polynomial formula in the optical bands,whereas it roughly has a linear form.?2?At a given stellar mass,the central surface brightness tends to become fainter with decreasing redshift.This feature is more obvious in bluer optical band.?3?In the entire redshift range,the LSB galaxies generally have lower SFR surface densities,less dust extinction,and lower central mass surface densities.?4?The LSB and HSB disk galaxies follow roughly the same slopes in the relations of scale length and stellar mass,but the LSB galaxies are systematically larger than HSB counterparts.Our results show that LSB disk galaxies might be having a parallel formation sequence their HSB counterparts,but with significantly slower rates of size growth and star formation.