Astrophysics

Phenomenological parameterization of the perturbed Einstein's equations has become an important route to testing General Relativity (GR) at cosmological scales. This is often done by constraining a pair of modified gravity (MG) parameters. We...

Resolved stars serve as versatile, plentiful tracers of the baryonic content of galaxies. By exploiting the precise, high-dimensional information provided by multi-band imaging of stars, we may place quantitative constraints on fundamental questions...

Rotationally supported, cold, gaseous disks are ubiquitous in astrophysics and appear in a diverse set of systems, such as protoplanetary disks, accretion disks around black holes, or large spiral galaxies. By using a cold, two-dimensional, gaseous...

Misaligned disks in binaries were commonly thought to evolve to a coplanar
state. However, recent theory and observations have surprisingly shown that disks around
eccentric orbit binaries can evolve to a polar state in which the disk is...

Abstract:  Self-interacting dark matter (SIDM) offers the potential to mitigate some of the discrepancies between simulated cold dark matter (CDM) and observed galactic properties.  In various SIDM models, dark matter particles can scatter with each...

The Bahcall Lunch follow the astrophysics colloquium lecture. Registration is required by 3pm the previous Friday so a meal can be provided. Please contact Amanda Cenker with questions.