Astronomy Colloquium: Gregory Herczeg
Dr. Gregory Herczeg from Kavli Institute for Astronomy and Astrophysics at Peking University will be the featured speaker at an upcoming Department of Physics and Astronomy colloquium. His talk is titled, From Protostars to Adolescence: A Tour of Young Stellar Systems."
While the stages in the formation of stellar systems are now well charted, uncertainties in the initial conditions and evolution lead to stellar systems with a diverse array of architectures. In this talk Herczeg will discuss the major stages in the evolution of young stellar objects, starting from the young protostars and ending in stars that have dispersed all circumstellar material. At each step he will describe insights into some of the relevant processes that are being obtained from ongoing observational programs. For protostars, we are pursuing the first long-term monitoring program in the sub-mm to establish the role of accretion variability during the main phase of stellar growth. The next stage, protoplanetary disks, is now being revolutionized by exquisite ALMA images of substructures, which point to the presence of hidden planets. Finally, Gaia observations of young stars that have shed their disk promise to reveal the recent star formation in our local neighborhood, although this will require improved measurements of stellar properties.
There will be refreshments beginning at 3:30 p.m.
Admission is free and open to all.
Department of Physics and Astronomy