Astrophysics

For two decades, the international Gemini Observatory has powered astronomical discovery for the entire U.S. community and the international Gemini partnership. Gemini’s twin 8.1m optical/infrared telescopes provide nightly access to both...

Low-frequency Alfvénic turbulence is a leading candidate to explain the heating of the solar corona and launching of the fast solar wind. A sufficiently energetic source of such motions is observed near the coronal base and in-situ measurements...

Harish-Chandra characters generalize the ordinary group characters  to infinite dimensional representations of noncompact Lie groups.

In this talk, I first review the Harish-Chandra characters of de Sitter isometry group. Then I will show that...

Abstract 1: In this talk I will first briefly review recent developments in using forward modeling techniques combined with the likelihood from effective theory of large-scale structure to extract cosmological information from galaxy clustering. I...

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...

It has been suggested that the weak magnetic field hosted by the intergalactic medium (IGM) in voids is a relic from the early Universe. If so, the modern-day strength and coherence length of such fields could be “predicted” from reasonable...

Weak gravitational lensing of the large scale structure of the Universe has been identified as a powerful way to learn about dark matter and dark energy, two largely unknown components of the Universe that make up 95% of its matter-energy contents...

Recent radio observations of inflowing and outflowing plasma in the vicinity of supermassive black holes are linked to simple phenomenological models via general relativistic magnetohydrodynamic simulations through a methodology called "Observing"...