Title: Probing the baryonic processes at high redshifts from the Milky Way dwarf satellites

Speaker: Qingjuan Yu (KIAA/PKU)   

Time & Place: Thursday, 3:00pm, April 17th, Lecture Hall, 3rd floor  

Abstract: The dwarf satellites in the Milky Way are among the smallest and faintest galaxies in the universe. They are one of the most representative classes of objects for studying various baryonic processes involved in the extreme edge of galaxy formation and in the early universe. In this talk, I will report our study on the stellar chemical properties, the star formation and assembling history of the dwarf satellites around the Milky Way-like host galaxies. I will talk about the possible imprints of the various physical processes (including supernova feedback, the reionization of the universe, and molecular hydrogen cooling) on the metallicity and age distributions of the satellites, as well as on their metallicity versus stellar mass/luminosity correlation. I will further discuss how the current and future observations would put strong constraints on those processes. 

Biog:Dr. Qingjuan Yu is a professor at the Kavli Institute for Astronomy and Astrophysics, Peking University. She got her Ph.D. in Astrophysics from Princeton University, and worked at the Canadian Institute for Theoretical Astrophysics, the University of California at Berkeley and at Santa Cruz. Her main research interests include galactic and planetary dynamics, black hole physics and active galactic nuclei, formation and evolution of galaxies and supermassive black holes, and cosmology.