Astrophysics

The Bahcall Lunch follows the astrophysics colloquium lecture. 

We are living exciting times: we are now able to probe the most violent events of the Universe with diverse messengers (cosmic rays, neutrinos, photons and gravitational waves). One challenge to complete the multi-messenger picture resides in the...

This week we join with SFIR: Star Formation/ISM Rendezvous. Note the special time and place.

Weak lensing is a powerful tool to extract information from large-scale structures to study the nature of dark matter and dark energy. Two-point correlation function (2PCF) of weak lensing is one of the simplest summary statistics but can extract...

Abstract: Recently, many results concerning stable big bang formation have appeared. Most of the results concern stability of spatially homogeneous and isotropic solutions. However, a recent result of Fournodavlos, Rodnianski and Speck (FRS) covers...

Motivated by explosive releases of energy in fusion, space and astrophysical plasmas, this talk considers the nonlinear stability of stratified magnetohydrodynamic (MHD) equilibria in 2D. I demonstrate that, unlike the Schwarzschild criterion in...

Black holes (BHs) can be described as astrophysical particle accelerators because finite-energy particles in free fall can collide with diverging center-of-mass (CM) energy near the horizon. Here we examine the case of high energy collisions which...

Abstract: Muon colliders offer a unique path to multi-TeV, high-luminosity lepton collisions. Muon collisions with a center-of-mass energy of 10 TeV or above would offer significant discovery potential where the constituent collision energies exceed...

Star formation histories (SFHs) encode the rich and complex evolution of galaxies over cosmic time. In recent years, we have made significant progress in understanding SFHs, thanks to a combination of new observational data, theoretical insights...