Astrophysics

Abstract: Celebrating a hundred years of quantum mechanics, the United Nations has declared 2025 the International Year of Quantum Science and Technology. This is not only an occasion to step back and marvel at the progress, it also raises the...

Massive stars remain a centerpiece of astrophysical research, enriching their galactic environments throughout their dynamic lives and often-explosive ends, and leaving behind compact objects as remnants. The past decade has yielded great progress...

Observations by Magnetospheric Multiscale have demonstrated that magnetic reconnection occurs at Earth's bow shock, typically at thin current sheets arising from plasma instabilities and turbulence in the shock transition region. In this talk, we...

Gravity-only simulations have been crucial for predicting the matter power spectrum, but they assume baryons have little influence on large-scale structure formation—a notion that has been proven incorrect. With upcoming surveys like LSST and the...

Abstract: We use asymptotic symmetry arguments to show that the only physical states in QED scattering theory are maximally entangled states, in which electron (or positron) momenta at timelike infinity are entangled with soft radiation with memory...

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...

Pulsar timing array experiments around the world have reported evidence of a stochastic gravitational wave background (GWB) at nanohertz frequencies. This background is thought to be sourced by a cosmic population of supermassive black hole binaries...

Pulsar timing array (PTA) experiments aim to detect nHz-frequency gravitational waves using high-precision timing of millisecond pulsars. Multiple PTA collaborations have recently reported evidence for a stochastic gravitational wave background...