跳转到主要内容

Colloquium by James Binney (University of Oxford)

Weighing our Dark Halo

Abstract:

A dark halo is supposed to contain ~95% of the mass of our Galaxy. Since the dark halo contributes so largely to the Galaxy's gravitational field and it's impossible to understand the distribution and velocities of stars without knowledge of the Galactic gravitational field, mapping the dark halo is a central task for a Galaxy modeller. I'll explain how data from the SDSS and RAVE surveys has been used to constrain tightly the distribution of dark and stellar mass interior to the Sun's orbit, and argue that scattering of dark-matter particles by baryons has significantly modified the dark-matter distribution in the inner kpc. This work relies heavily on new methods in galaxy dynamics which promise also to revolutionise studies of external galaxies.
Time: Apr. 05, 2017, 14:30 pm
Venue: A601, NAOC

Copyright © 2018-2020 NAOC All Rights Reserved. 版 权 声 明:
本网站所有内容(包括但不限于文字、图片、文档、视频资料等),版权归属中国科学院国家天文台。所有内容仅限用于学术交流,不能用于商业或盈利用途。
任何媒体、网站或个人未经授权不得转载转贴或以其它方式复制发布/发表,对不遵守本声明或其他违法使用相关内容者,我们保留追究其法律责任的权利。