Astrophysics

The solar corona is the hot and ionized outer atmosphere of the Sun. It traces out the complex solar magnetic field and expands into interplanetary space as the supersonic solar wind. In 1958, Eugene Parker theorized that the presence of a million...

The Bahcall Lunch follows the astrophysics colloquium lecture. 

We currently know of more than 10,000 planets and planet candidates orbiting nearby stars.  This population is dominated by planets with masses between 1-10 times that of the Earth, which can be divided into two broad classes (‘sub-Neptunes’ and...

In this talk, I will present recent developments in perturbation theory regarding the study of the large-scale clustering of galaxies in theories with scale-dependent linear growth, such as those involving massive neutrinos and modified gravity. The...

Abstract: We will discuss two recent developments in black hole perturbation theory: 

(1) the symmetries behind the well-known vanishing of the tidal Love numbers, and

(2) second order quasi-normal modes during the ring-down phase after a binary...

Each week, we hold a relatively informal seminar/discussion series with an emphasis on extra-galactic and large-scale structure astrophysics.

During Galread a leader/visitor presents a recent paper to the discussion group. The PDF of the paper is...

I will explore the "Elusive Universe," where dark matter, neutrinos, and gravity sculpt our observed nature, leaving many open questions.
My work focuses on opening up new directions to answer these puzzles. I will present two approaches:
1) Using...