# Video Lectures

### A Continuous Theory of Stellar System Formation

Kaitlin Kratter

A satisfying theory for star or planet formation should not consider these processes in isolation. With the power of recent observational surveys, we are well positioned to test detailed theoretical models of multiple-star formation and orbital...

### A TQFT Perspective on Fracton Order

Fracton phases of matter exhibit striking behaviour which seemingly renders them beyond the standard topological quantum field theory (TQFT) paradigm for gapped quantum phases. In this talk, I will discuss progress towards understanding fracton...

### From Panchromatic Images to Stellar Ages and Beyond

Joshua Speagle

Large-area surveys such as Gaia have given us an unprecedented amount of data on stars in the Milky Way. One of the largest ongoing challenges in understanding the present-day structure and formation history of our Galaxy (i.e. Galactic archaeology)...

### Brave New World of Numerical Relativity

Deirdre Shoemaker

After decades of preparation, the era of gravitational wave astronomy has begun. The gravitational wave detectors, LIGO and Virgo, have published a catalog of 90 events of coalescing compact objects including black holes and neutron stars. I will...

### Non-Invertible Symmetries and their Representations

In the first half of the talk, I will review the notion of non-invertible symmetries and how they help us to analyze certain strongly coupled QFTs like 2d Adjoint QCD. Then, I discuss the representation theory of non-invertible symmetries and use it...

### Genesis, dynamics, and dissipation of turbulent magnetic fields

Astronomical observations indicate that coherent, dynamically important magnetic fields are ubiquitous in the Universe. However, neither the origin problem -- what are the physical mechanisms that generate the initial seed'' magnetic fields —- nor...

### Dusty sources and accretion in the Galactic Center

Anna Ciurlo

The proximity of the Galactic Center makes it unique for studying the

interactions that take place between the interstellar medium, the

stars and the supermassive black holes in galactic nuclei.  The galactic

supermassive black hole is not...

### Origin of the Moon: New Results and Open Issues

Robin Canup

A primary scientific outcome of the Apollo program was the giant impact theory for lunar origin, in which a collision at the end of Earth’s main accretionary phase creates a disk from which the Moon forms.  In the past decade, the nature of a Moon...

### Pushing the frontiers of gravitational encounters and collisionless dynamics

Uddipan Banik

Gravity plays the central role in structure formation and evolution in astronomical scales. Despite the apparently simple inverse square law for the gravitational force in the non-relativistic regime, the dynamics of self-gravitating many-body...

### Large-Scale Millimeter Wave Surveys

Mark Devlin

Millimeter-wave surveys of the sky have the potential for yielding a wealth of information about our universe from the first instants of its existence to our own solar system. I will describe how modern measurements of the cosmic microwave...