The title of his presentation is Protoplanetary Disks in Multiple Star Systems.
Most stars are born in multiple systems. Because of this ubiquity, planets in these systems could comprise a large fraction of all planets. Theory indicates that stellar companions reduce the likelihood of planet formation by stripping away mass from young protoplanetary disks and by inhibiting grain growth to large sizes. Significant evidence of this reduction, however, has been elusive.
Title: Diagnosing the Formation of Elliptical Galaxies
A challenge in extragalactic astronomy is that we cannot watch what happens to galaxies before and after they are observed. In particular, it remains debated whether galaxy mergers or internal processes drive supermassive black hole growth, trigger luminous starbursts, and shape the population of elliptical galaxies we see today. However, given increasingly available computer...
Title: The Tidal Disruption of Stars by Supermassive Black Holes
Although quiescent supermassive black holes are ubiquitous in the universe, measuring their properties is quite challenging. The tidal disruption of an unlucky star offers a rare window into the demographics of these slumbering giants. I will present my theoretical research on the rates, dynamics, and accretion disks of tidal disruption events (TDEs), with a focus on...
You are invited to attend a thesis presentation by Astronomy PhD Candidate, Rebekah Dawson, entitled On the Migratory Behavior of Planetary Systems.
Thursday, April 25, 2013
Abstract: For centuries, an orderly view of planetary system architectures, inspired by the nearly circular and co-planar orbits of our solar system's planets, dominated the discourse on planetary systems. However, there is growing evidence that many planetary systems, including our own solar system, underwent a period...