Astrophysics Seminars

Gyrochronology utilizes the spin-down of stars as a function of time as an indicator of stellar age. This technique has the potential to yield precise ages for large samples of stars, providing unprecedented chronological information for studies of...

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...