Astrophysics

Abstract: The uniqueness of the Kerr-de Sitter family of  black hole spacetimes as stationary solutions to the Einstein vacuum equations is a crucial ingredient to understanding the final states of positive cosmological constant universes, such as...

I will discuss the current status of DESI-1, some forecasts for the next set of cosmological constraints from DESI and highlight the southern expansion of the footprint happening between now and December 2028. Then I will present the current plans...

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...

Plasmas exhibit a wide range of behaviors across fluid and kinetic regimes, governing key processes in diverse laboratory, space, and astrophysical environments. Understanding these systems requires numerical models with varying levels of physical...

Iron (Fe) is the most abundant element on Earth by mass, and all lifeforms on Earth evolved to utilize Fe for critical biochemical functions. Quantitative measurement of biological iron in cells, tissues, and the human body can reveal important...

21 cm cosmology -- the concept of using radio telescopes to observe the highly redshifted 21 cm line of neutral hydrogen on cosmological scales -- is a field with tremendous scientific potential.   After nearly 20 years of experimental effort...