Astrophysics

The so-called galaxy--halo connection is a vast topic concerning how galaxies populate their host dark matter halos.  I will present some works we have made under this grand theme, including (1) a unique method to estimate the host halo mass (and...

Abstract: In this talk, I will present a Hamiltonian approach to show decay for massless Vlasov fields on the exterior of black hole backgrounds. Vlasov fields are transported along the geodesic flow, and so, the existence of trapped geodesics is an...

I will summarize what is known about UHECRs.  The observations are in fact highly constraining.  The rigidity distribution (R==E/Ze) of UHECRs is observed to be very narrow which rules out the most popular source scenarios.  This feature follows...

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...

Super-Earths and sub-Neptunes are the most abundant exoplanets discovered in our galaxy to date. However, much of their nature and origin remains shrouded in mystery. Generally speaking, super-Earths and sub-Neptunes are thought to have formed with...

In the past decade, effective theories of large-scale structure (EFT) have become the premier way to constrain fundamental physics using spectroscopic surveys starting from first principles. In this talk I will discuss a promising but relatively new...

We present an initial subset of the Dark Energy Bedrock All-Sky Supernova (DEBASS) dataset. The DEBASS program has 3.5 nights per semester over three years, utilizing the DECam instrument to conduct follow-up observations of existing all-sky...