Astrophysics Seminars

As clusters of stars orbit our own Milky Way, a gravitational tidal interaction unfolds and the clusters tear apart into distinct morphological and kinematic structures. From our understanding of gravity, the distribution and motion of these...

Galaxy clusters as astronomical tools generally offer two advantages: to boost the brightnesses of objects in the background, and to study the dark matter in the lens. We can now introduce a third use: to unveil properties of the underlying dark...

Since the first discoveries of gravitational waves and the data release from the first observing run of Advanced LIGO, the astrophysics community has a growing interest to understand gravitational-wave data. In this talk, I will give an overview on...

I'll present new efficient and accurate techniques for including massive neutrinos in N-body simulations, using a linear response (to the cold dark matter) approximation for the neutrinos. Then I'll talk about the
potential for massive neutrinos to...

I will talk about several fundamental physical theories that can potentially be discovered with the help of GW observatories. I will start with reviewing the effect known as "Black Hole Superradiance". If a new light bosonic particle happens to...

The inner regions of active galaxies host the most extreme and energetic phenomena in the universe including, relativistic jets, supermassive black hole binaries, and recoiling supermassive black holes. However, many of these sources can not be...

In this talk I will cover two topics. First, I will talk about how to use large-scale structure data to search for light relics with small (but finite) masses, such as neutrinos. These particles are known to suppress the matter fluctuations at small...

As established by ground based surveys, white dwarfs with hydrogen atmospheres pulsate as they cool across the temperature range, 12,500 K Teff 10,800 K. Known as DAVs or ZZ Ceti stars, their oscillations are attributed to overstable g-modes...

The interactions between forming stars and their environment shapes the natal cloud evolution, the efficiency at which stars form and the stellar initial mass function. Commonly, signatures of stellar feedback are identified “by eye.” However, this...

Atmospheric escape or mass loss is an important process in the evolution of planetary atmospheres in the Solar System, as well as in extrasolar planets. However, there are many aspects of atmospheric escape in exoplanets that remain poorly...