Astrophysics Seminars

Studies of Fermi data indicate an excess of GeV gamma rays around the Galactic center (GC), possibly due to dark matter. I will show that young gamma-ray pulsars can yield a signal with a spectrum, amplitude, and morphology similar to the observed...

I discuss ongoing efforts to make vast 3D maps of our universe using 21 cm tomography, thereby shedding light on the cosmic dark ages and the epoch of reionization and providing new information about dark matter, dark energy and our cosmic origins...

We use local three-dimensional magnetohydrodynamic simulations to investigate the quasi-equilibrium states of galactic disks regulated by star formation feedback. We incorporate effects from massive-star feedback via time-varying heating rates and...

I will present results from a search for gamma-ray emission in nine Milky Way satellites recently discovered in the Dark Energy Survey. The nearest of these, Reticulum 2, shows evidence for a signal in public Fermi data. The detected emission is...