Astrophysics Seminars

Discs of stars around super-massive black holes, like the one at the Galactic centre, evolve primarily via resonant relaxation, which is the process governing the evolution of the angular-momentum vectors of stellar orbits about the super-massive...

The evolution of planets and planetary systems depends on the environments created by their host stars in a number of ways.  In this talk, I will discuss several observable impacts of stellar winds, radiation pressure, and non-thermal ionizing...

Massive black holes (MBHs) exist at the centers of many dense star systems, particularly in galactic nuclei.  Steady accretion onto MBHs powers active galactic nuclei, but dynamical processes near MBHs can generate various forms of transient...

In the era of high-dimensional data and simulation-based science, machine learning is transforming the different stages of the scientific method in astrophysics. I will present a summary of my research connected to generative models in two main...

In the past decade, we have detected hundreds of gravitational waves, advancing our understanding of the Universe and its governing laws. In this talk, I will present the theoretical models and data analysis tools I have developed for interfacing...

Cosmological observables, from the Lyman-alpha forest to the Milky Way substructure, offer unique avenues for probing dark matter and neutrino sectors. Moreover, they often reveal anomalies and tensions that could signal new physics. I will review...

Massive black holes (MBHs) are found in galaxies across a wide mass range and play a central role in regulating gas cooling and star formation through active galactic nucleus (AGN) feedback. Cosmological simulations—where MBHs and galaxies co-evolve...

Gas-rich environments are ubiquitous in various scales, from protoplanetary disks to star clusters and galaxies. Dynamics in gas-rich environments are substantially different and give rise to unique astrophysical phenomena, along with enhancing the...

Nonlinear magnetic structures can be generated in the vicinity of collisionless shocks by streaming of accelerated particles and as part of the shock structure evolution. I will discuss the effects of these nonlinearities on particle pre-heating and...

Super-Earths and sub-Neptunes are the most abundant exoplanets discovered in our galaxy to date. However, much of their nature and origin remains shrouded in mystery. Generally speaking, super-Earths and sub-Neptunes are thought to have formed with...