Astrophysics

Stellar streams form as dwarf galaxies and globular clusters tidally disrupt around their host galaxy. To date, more than 100 streams have been detected around our Galaxy. In this talk, I will begin with an overview of how streams form, how they can...

While recent observations of young protostellar disks have revealed much about their structure, the formation process from molecular cloud cores and subsequent evolution remains relatively poorly understood, with the role of the magnetic field in...

Abstract: We will start with a review of previous results concerning  instabilities of rotating Kerr black holes to massive scalar field perturbations. These instabilities are connected to superradiance and hence do not occur on the Schwarzschild...

Claims of a low clustering amplitude (S_8) at low redshifts from weak galaxy lensing measurements trace back nearly a decade, however, recent work suggests these results may be driven by large baryonic feedback or mischaracterization of linear...

In a protoplanetary disk, a sufficiently massive planet can excite a pressure bump, which in turn become a preferred location for the formation of a new planet core. This creates a feedback loop that quickly assembles multiple planet cores, and this...

SuperBIT is the first of its kind, three-axis stabilized, high-resolution, wide-field imaging telescope that flies on a stratospheric balloon. I report on SuperBIT's 40-day science flight in 2023, during which it observed dozens of astrophysical...

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: The Council of CERN is responsible for formulating the scientific and financial policy of CERN. It does this with strong coordination with the CERN Director General and Management. I will describe how the CERN Council reaches its decisions...

In the era of JWST, observations are yielding more detailed information about the distribution and structure of star-formation regions in distant galaxies than ever before. To interpret these observations, galaxy simulations need to use increasingly...

From the collapse of molecular clouds into stars to spectacular galactic mergers, binary systems form on many scales across the universe. Interactions between binaries and their environments can sculpt the stellar populations we observe today, alter...