Astrophysics

Abstract: Most cosmological data analysis today relies on the Friedmann-Lemaitre-Robertson-Walker (FLRW) metric, which provides the basis of the current standard cosmological model. Within this framework, interesting tensions between our...

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: At the center of our Milky Way Galaxy lives a compact massive object called Sagittarius A* (Sgr A*) which is believed to be a black hole. Its mass, as inferred from the orbits of gravitationally bond stars as well as from direct images...

The Bahcall Lunch follows the astrophysics colloquium lecture. 

How magnetized turbulent plasmas can accelerate charged particles to high energies represents a long-standing question with far-reaching implications for high-energy and multi-messenger astrophysics. It indeed goes back to the seminal works of...

Abstract: Celestial holography aims to uncover aspects of a theory of quantum gravity in asymptotically flat spacetime by studying a putative dual "celestial" conformal field theory (cCFT) that lives on its boundary. A primary way to do this is to...

Abstract: A new era in astrophysics was inaugurated with the 2015 discovery of gravitational waves from the collision of two black holes in data from the Laser Interferometer Gravitational-wave Observatory (LIGO). Since then, LIGO and its sister...

As the next generation of large galaxy surveys come online, it is becoming increasingly important to develop and understand the machine learning tools that analyze big astronomical data. Neural networks are powerful and capable of probing deep...