Astrophysics

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...

Abstract: A sharp definition of what “adiabatic” means is given; it is then shown that the time-dependent expectation value of a quantum-mechanical observable in the adiabatic limit can be expressed— in many cases—by means of the appropriate Berry...

I will present surprising observational results on the 3D shapes and large-scale alignments of high-redshift galaxies from JWST. I will show that there are many more linear, elongated dwarf galaxies than there are round, circular dwarf galaxies seen...

The common observation that Jupiter's Galilean moons resemble a miniature Solar System has long been seen as evidence that young giant planets are surrounded by circumplanetary disks of gas and dust. Recently, one circumplanetary disk - around the...

Chandra is one of NASA's "great observatories" and was launched in 1999. In this talk, I will review Chandra's history and instruments and show highlights from an absolutely astonishing 25 years of science observations. 

A "30 ft orbiting X-ray...

Modern large-scale surveys have adopted “3x2pt" correlations as one of their key probes for extracting cosmological information. 3x2pt techniques combine gravitational lensing and clustering of (selected) large-scale structure tracers with the goal...

Understanding multiphase gas flows through the circumgalactic medium (CGM), the gas residing beyond a galaxy’s interstellar medium to the outskirts of its halo, is required to gain a complete picture of galaxy growth. Simulations can be used to gain...

Tayler instability of toroidal magnetic fields is broadly invoked as the main trigger for turbulence and angular momentum transport in stellar radiative zones. I will discuss a recent systematic revision of the linear stability analysis and present...

The Bahcall Lunch follows the astrophysics colloquium lecture. Registration is required by 4pm the previous Thursday so a meal can be provided. Email Amanda at cenker@ias.edu with questions.