The subject in focus here is a hydrogen-depleted supergiant star in the Andromeda galaxy (M31), which produced a black hole without collapsing. Findings regarding the star and the unique ...

The explosions, which leave behind a black hole or a neutron star ... hydrogen-depleted supergiant star in the Andromeda galaxy (M31) failed to detonate as a supernova. The research, posted ...

Now that may sound big, but Sagittarius A* is small compared to other supermassive black holes. Take the one at the center of our neighbor the Andromeda galaxy, which has a diameter of 516 million ...

The Andromeda Galaxy, our nearest galactic neighbor, is a majestic spiral galaxy like the Milky Way. Let’s uncover some ...

Active galaxy—A galaxy with an unusually strong output of energy, thought to be powered by a supermassive black hole in its core. Andromeda Galaxy—The nearest large spiral galaxy to the Milky ...

I study stellar and gas dynamics near massive black holes, with applications to our Galactic center, the Andromeda (M31) nucleus and post-starburst galaxies. I'm also interested in the strange orbits ...