Einstein's Cross under the gravitational microlens
Wednesday, December 23, 2015 - 06:21
in Astronomy & Space
A Spanish research team has obtained measurements for the innermost region of a disc of matter in orbital motion around a supermassive black hole in the quasar known as Einstein's Cross (Q2237-0305). It constitutes the most precise set of measurements achieved to date for such a small and distant object.