What properties correlate with molecular-to-atomic gas ratios in galaxies  

作　　者：Renbin Yan 

机构地区：[1]Department of Physics,the Chinese University of Hong Kong,Hong Kong 999077,China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2024年第9期201-202,共2页中国科学：物理学、力学、天文学（英文版）

摘　　要：The baryon cycle in and around galaxies is a critical piece of the picture of galaxy evolution.Stars form out of gas.When stars evolve and die,they return gas back into the interstellar medium(ISM)but pollute it with newly synthesized heavy elements,whose abundance relative to hydrogen is referred to as metallicity by astronomers.Gas can also flow into galaxies due to gravity and out of galaxies due to energetic feedback from massive stars,supernovae,and active galactic nuclei.

关 键 词：EVOLUTION GALAXIES STARS 

分 类 号：P152[天文地球—天文学]