天文学进展2011，Vol.29Issue(1)：46-59,14.
星系的基本面
Fundamental Plane of Galaxies
摘要
Abstract
The Fundamental Plane (FP) is an empirical scaling relation first found for the early-type galaxies, which is a tight correlation among the effective radius Re, the central velocity dispersion σ0, and the mean surface brightness within the effective radius Ⅰe. Since the measurements of σ0 and Ⅰe are independent of distance, the FP can be used as a distance indicator for early-type galaxies. Moreover, the FP provides a strong constraint on the models of the formation and evolution of the early-type galaxies, especially their stellar population and dynamical evolution.This paper gives an overview of the FP study on early-type galaxies, including the observed FPs in different bands, the FPs of galaxies at different environments and redshifts.Although there is controversy over the changes of FP with observation band, the slope a of FP is believed to be changed, even if it is unnoticeable, and the slop b is a constant. Whether the FPs at different environments are different is also controversial. For the FP evolutionary,it is generally acknowledged that only the zero point c of the FP at mid-redshift is different from that of nearby galaxies.We then review the theoretical explanations of the ‘tilt' of FP relative to the prediction from the virial theorem. There may be three main reasons: the velocity dispersion of early-type galaxy can not be used to represent its total energy; the mass-luminosity ratios of galaxies with different masses are different; the early-type galaxies do not have unified structure and dynamics.Finally, as a comparison, we also review the FP study of spiral galaxies, including both the observational and theoretical aspects. Although there is controversy over the exitance of the FP of spiral galaxies on observation, its study is important on constraining the models of the formation and evolution of spirals.关键词
早型星系/基本面/旋涡星系Key words
early-type galaxies/ Fundamental Plane/ spiral galaxies分类
天文与地球科学引用本文复制引用
王彩虹,王有芬,沈世银,邵正义..星系的基本面[J].天文学进展,2011,29(1):46-59,14.基金项目
国家自然科学基金重点项目(10833005) （10833005）
