Astrophysics

Abstract: Following the first detection of a binary black hole merger in 2015, the number of gravitational wave events has grown to almost one hundred, including binary neutron star mergers and mixed black hole, neutron star mergers. Going forward...

I will describe the phenomenology of stellar basins: volumetric stellar emission into gravitationally bound orbits of weakly coupled particles such as axions, moduli, hidden photons, and fermions. While only a tiny fraction of the instantaneous...

As we recently crossed several breakthroughs in magnetic fusion plasma physics and we approach an epoch-making milestone in the near future, it is worthwhile to celebrate the theoretical foundations of our progress toward magnetic nuclear fusion...

The Event Horizon Telescope (EHT) collaboration has recently published the first image of the near-horizon region around the supermassive black hole at the center of our Milky Way galaxy, Sgr A*. In addition to providing new constraints on general...

The equivalence between the inertial and gravitational mass is built-in the formulation of General Relativity as the curvature of space time. In the visible sector, the equivalence principle has been tested with extraordinary precision, but very...

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...

Following the collision of two compact objects, an accretion disk forms and from it matter is ejected that sources the universe's heavy elements and that is observable as a kilonova. The amount of ejecta, the types of elements that form, and the...

Collisionless shocks are ubiquitously in the Universe and are held responsible for the production of non-thermal particles and high-energy radiation. Without particle collisions, theoretical works show that microscopic instabilities are able to...