Physics & Astronomy Colloquium: Prof. Masashi Chiba, Tohoku University


Location: 127 Nieuwland Science Hall (View on map )

Deciphering the nature of dark matter from stellar systems in the Galaxy

Prof. Masashi Chiba
Astronomical Institute
Tohoku University

The nature of dark matter is still enigmatic. CDM models have been a theoretical paradigm for many years, because the models are successful for reproducing the observed large-scale structure of the Universe, say at scales larger than ~ 1 Mpc. However, there are various unsolved issues at smaller scales, i.e., scales of galaxies and their satellites, such as the missing satellites problem, core/cusp problem, and more, so that several alternative dark matter models are also proposed. Here, I’d like to present our efforts to get insight into these small-scale issues: the search for new ultra-faint dwarf satellites in the Galaxy, the constraint on the dark matter profile in dwarf galaxies, and more. Future prospects for settling these small-scale issues are also presented.

Hosted by Prof. Kirby