University of Maryland
Atlantic Building, Room 2400
4:30 PM Monday, October 1, 2018
Coffee, Tea & Snacks 4:15-4:30 PM

Massimo Ricotti
Department of Astronomy, University of Maryland
The Origin of Old Globular Clusters and Ultra-faint Dwarf Galaxies and Implications on the Reionization Epoch

I will describe my research on galaxy formation before the epoch of reionization, focusing on understanding what determines the size and morphology of stellar objects in the first low mass galaxies, using parsec-scale cosmological simulations performed with an adaptive mesh hydrodynamics code. Globular clusters and a recently discovered population of ultra-faint dwarf galaxies are among the oldest objects in the universe. I will argue that, although their appearance is very different today, they may have common origins at formation. I will discuss the consequences for reionization of the intergalactic medium and near-field cosmology.

Sponsored by: Department of Physics and the Institute for Physical Science and Technology, University of Maryland. For information visit the UMD Space Physics group seminar web site at

There is free parking after 4:00 PM in lot B (the big parking garage across the street from the ATL building). There are a limited number of spaces in lot Q next to the new ATL wing with free parking after 4PM even when there is a basketball game on campus.