Galactic Disks and Bulges; Origins and Evolution

Dalcanton, julianne，华盛顿大学，邮编：9900862Dalcanton将通过两种不同的方法研究螺旋星系的形成。第一个将集中研究星系盘的形成和演化，第二个将集中研究星系凸起的形成。其目的是提供物理量的直接测量，这些物理量要么控制星系的形成，如质量或角动量，要么描述星系的演化，如时间和金属丰度。各种观测数据，包括光学和近红外图像、光谱学和HI图，将用于提供质量分布、恒星形成历史和金属丰度将被确定的基本数据。

Dalcanton, JulianneUniversity of WashingtonAST-9900862Dr. Dalcanton will study the formation of spiral galaxies, through two distinct approaches. The first will concentrate on studying the formation and evolution of galaxy disks and the second the formation of galaxy bulges. The aim is to provide direct measurements of physical quantities which either control galaxy formation, such as mass or angular momentum, or describe galaxy evolution, such as timing and metallicity. A variety of observational data, including optical and near IR images, optical spectroscopy and HI maps, will be used to provide the basic data from which mass distributions, star formation histories and metallicities will be determined.