Astrophysics & Planetary Sciences Colloquium
How were the most ancient objects in the universe formed?
When
-
Abstract: Ancient remnants from the early universe surround our galaxy, which you may know as globular clusters. Although now on their old age, understanding how these clusters were formed has the potential to provide insight into the physical conditions that prevailed during an epoch that cannot be directly observed. We now know that globular clusters can form during extreme episodes of star formation in the relatively nearby universe, but the actual physical conditions that give rise to globular clusters have vexed both observers and theorists for decades.
Pulsar Timing Arrays: A New Window on the Gravitational Wave Universe
When
-
Abstract:
Millisecond pulsars are rapidly rotating neutron stars with phenomenal rotational stability. Pulsar timing arrays world-wide monitor over 100 of these cosmic clocks in order to search for perturbations due to gravitational waves at nanohertz frequencies. The tell-tale sign of a stochastic background ofgravitational waves in pulsar timing data is the presence of quadrupolar spatial correlations.
What did we learn from black hole images?
When
-
Abstract:
The data collected with the Event Horizon Telescope provided the first horizon-scale images of two nearby supermassive black holes. A tremendous amount of theoretical modeling and interpretation, including large simulation libraries and new analysis tools, were necessary to extract physical constraints from these images and perform quantitative tests of General Relativity, plasma physics, and black hole environments. In this talk, I will discuss: 1. the physics behind the simulations and where they succeeded and failed; 2.
APS Lightning Talks: Let's Talk Research
When
-
Abstract:
APS Faculty who have research opportunities in their group will present flash talks on their research.
