Astrophysics Seminars

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...

I will present recent results on how binary black holes (BBHs) merge in dense stellar systems through chaotic few-body interactions. From taking into account GR effects in the equation-of-motion, I will show that dense stellar systems are likely to...

Gravitational lensing by galaxy clusters has become an important tool in studying galaxies from the first billion years of cosmic time; the clusters act as "cosmic telescopes" and make distant galaxies easier to detect. This unique capability has...

The star formation process occurs in star clusters and stellar associations, following the collapse of the giant molecular cloud. As a byproduct, planets form in protoplanetary disk within 10 Myr after the star formation process. Before the...