Recent Developments on the HI Gas of Low-Redshift Galaxies Seen by the 21 cm Emission Lines

扫码查看

原文链接

万方数据

外文摘要：As a major interstellar medium,the atomic neutral hydrogen(H I)plays an important role in the galaxy evolution.It provides the ingredient for star formation,and sensitively traces the internal processes and external perturbations influencing the galaxy.With the beginning of many new radio telescopes and surveys,H I may make a more significant contribution to the understanding of galaxies in the near future.This review discusses the major development of the 21cm emission-line H I observations and studies in the past few years,including its scaling relations with other galaxy properties,its kinematics and structures,its role in environmental studies,and its constraints on hydrodynamical simulations.The local-Universe H I scaling relations of stellar-mass-selected samples extend smoothly to 10 9M☉ stellar mass,with a tentative evolution to the redshift of～0.1.The development of measurement techniques enables better estimations of H I non-circular motion,dispersion,and thickness,and new observations revealed extended or extra-planar H I structures,both helpfully constraining the gas accretion,stellar feedback,and star formation processes of galaxy evolution models.H I is very useful for tracing the satellite evolution in dense environments,the studies of which would benefit from ongoing blind H I surveys.Though simulations still cannot fully reproduce H I gas properties,they help to understand the role of possible factors in regulating H I properties.

作者：

王菁、林旭辰

展开 >

作者单位：

Kavli Institute for Astronomy and Astrophysics,Peking University,Beijing 100871,China

Department of Astronomy,School of Physics,Peking University,Beijing 100871,China

基金：

National Key Research and Development Program of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaChina Manned Space Project

项目编号：

2022YFA160290212073002122330018200906879

出版年：

2024

DOI：

10.1088/0256-307X/41/10/109801

中国物理快报(英文版)

中国科学院物理研究所,中国物理学会

中国物理快报(英文版)

CSTPCDEI

影响因子：0.515

ISSN：0256-307X

年,卷(期)：2024.41(10)