Astrophysics Seminars

ABSTRACT: Gravity theories and large-scale cosmological tests have been actively pursued in recent years. This talk will focus on a new arena for astrophysical tests of gravity: dwarf galaxies and stars in the nearby universe. Theoretical...

The lecture will present new techniques that will be employed over the coming decade to probe strong field gravity in the vicinity of black holes. Advances in technology (in the form of long baseline interferometry at a wavelength of ~1 millimeter)...

ABSTRACT: As a low- or intermediate-mass star evolve to the final white dwarf stage, it often loses more than 50% of its original mass. Consequently, its planetary system expands, and the collision rates among the subplanetary bodies, such as...

ABSTRACT: Through their census, internal structure, and substructure, galaxy clusters encode signatures of the expansion history of the universe, and basic properties of the dark matter particle. I will present early work on systematic multi...

ABSTRACT: Recent observations of galaxy clusters reveal new insights into the dynamical and nonthermal processes in the intracluster medium (ICM). Tangential discontinuities (known as cold fronts) are directly seen in high resolution X-ray maps of...

ABSTRACT: Binary SMBHs are generic outcomes of hierarchical galaxy mergers. They are of great value in understanding the role of galaxy mergers in AGN fueling and the interplay between SMBHs and their hosts, as well as predictions for future...

ABSTRACT: The human demand for products of photosynthesis is a powerful measure of the aggregate impact of human action on the biosphere and indicator of societal vulnerability to climate change. We show results from several studies that use...