The relics of building blocks that made stellar halo and bulge are yet to be discovered unless they were completely disrupted throughout the history of the Galaxy. Here we suggest that about 25% of the Milky Way globular clusters have characteristics of the remaining cores of these early building blocks rather than genuine star clusters. They are clearly distinct from other normal globular clusters in the presence of extended horizontal-branch and multiple stellar populations, in mass (brightness), and most importantly in orbital kinematics. Based on this result, a three-stage formation picture of the Milky Way is suggested, which includes early mergers, collapse, and later accretion.
|Number of pages||5|
|Journal||Astrophysics and Space Science Proceedings|
|Publication status||Published - 2009|
|Event||International Conference on Ultraviolet Properties of Evolved Stellar Populations, 2007 - Puerto Vallarta, Mexico|
Duration: 2007 Apr 16 → 2007 Apr 20
Bibliographical notePublisher Copyright:
© Springer Science+Business Media, LLC 2009.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)
- Computer Science Applications
- Space and Planetary Science
- Nuclear and High Energy Physics