Joint IAS Princeton University Astrophysics Colloquium

Most of the power from an Active Galactic Nucleus is released close to the black hole, and thus studying accretion at event horizon scales—at the intersection of inflow and outflow—is essential for understanding how much matter accretes and grows...

JWST has enabled high-fidelity infrared spectroscopy for a wide range of transiting planets, directly imaged planets, and brown dwarfs.  In the past year, for transiting planets, observers have detected several molecules for the first time in an...

We find ourselves at a pivotal era in the study of cosmology and galaxy formation. The dark energy + cold dark matter (ΛCDM) paradigm is firmly established as the default cosmological model, owing in large part to its incredible success in...

Star clusters are a key product of star formation. They trace the densest peaks of the star formation hierarchy, and as (effectively) single-age populations, they have great utility as “clocks” for timing various phases of the star formation cycle...

We used more than 25 million galaxies in the Subaru Hyper Suprime-Cam (HSC) shear catalog in the redshift range up to z~1.5 to measure weak lensing distortion effects due to large-scale structures. We used the measured weak lensing signals to...

All large-scale structure cosmologists are faced with the question: how do we robustly extract cosmological information, such as on dark energy, gravity, and inflation, from observed tracers such as galaxies whose astrophysics is extremely complex...

Planets form from disks of dust and gas surrounding young stars.  As they grow, these new planets inherit their chemical composition from the surrounding material and then sculpt it through gravitational interactions to form gaps and other...

I will weave three separate threads. The first will be to describe recent and ongoing results from the Dark Energy Spectroscopic Survey. I will present the BAO results from the early DESI data, and some of the preparatory work for the Year 1 data. I...

The iconic spiral arms that decorate the disks of massive galaxies (like our own Milky Way) have been studied observationally and theoretically since they were first recorded 180 years ago, nevertheless the exact details of their nature remains...

Exoplanet systems are expected to evolve with time as they age. In most cases though, the dynamical evolution of exoplanet systems over billion-year timescales are hard to observe. I'll describe how Galactic kinematics can provide accurate and...