Astrophysics

Measurements of the small-scale CMB temperature and polarization fields have recently undergone transformative improvements with Data Release 6 (DR6) of the Atacama Cosmology Telescope (ACT) and will soon improve further with the Simons Observatory...

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...

Abstract: AGN variability presents a unique way to investigate the motion and structure of accreted material onto supermassive black holes (SMBHs) in active galactic nuclei (AGNs) across cosmic time. Reverberation mapping (RM) is a technique which...

I will motivate current work in weak gravitational lensing with cosmic and astrophysical puzzles. The evolution of dark energy, the growth of structure and feedback from supermassive black holes are some of the debated questions. I will describe how...

Neutrinos are a tiny subatomic particle with surprising properties under active study. In particular, neutrinos oscillate, that is, they convert from one type of neutrino to another, is a surprising phenomenon under active study. The origin of...

Abstract: Strong gravitational lenses have provided great insights into the expansion history of the universe and the dark matter distribution from clusters down to sub-galactic scales. Current state-of-the-art measurements involving strong...

Supermassive black hole mergers are extraordinary cosmic phenomena characterized by their immense energy release, producing gravitational waves that can rival the total light output of all stars in the universe within a short time frame. These...

Abstract: Upcoming gravitational-wave detectors offer unprecedented potential for probing early-universe physics. They are expected to be sensitive to a wide range of primordial stochastic gravitational-wave backgrounds generated by processes such...