Astrophysics

Interpreting observations of the universe’s most energetic phenomena requires a detailed understanding of particle acceleration in astrophysical environments. In particular, these accelerated particles, or cosmic rays, are responsible for non...

The Bahcall Lunch follow the astrophysics colloquium lecture. Registration is required by 3pm the previous Friday so a meal can be provided. Please contact Amanda Cenker with questions.

Much about dark matter remains unknown and much can be learned about its nature from its distribution on sub-galactic scales. I will discuss measurements of the small-scale structure of dark matter in elliptical galaxies and in the Milky Way from...

There is interest in operating a 1-MeV 1-kWatt electron accelerator on a spacecraft in the tenuous plasma of the Earth’s distant magnetosphere. The desire is to fire the electron beam into the atmospheric loss cone to optically excite the atmosphere...

Abstract: Are black holes stable? This question, which has played a central role in General Relativity ever since the discoveries of the Schwarzschild (1916) and Kerr (1963) solutions, can be formulated as a remarkably simple to state mathematical...

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...

Distribution is a ubiquitous data type in high energy physics (HEP), many other sciences, and our daily life. When the space of distributions is equipped with a suitable metric, previously ad-hoc notions of similarity can now be formulated in a...