Astrophysics News & Events

Enter words that may appear in the title

Slowly Rotating Accretion Flows around Supermassive Black Holes in Elliptical Galaxies

GGD - Gr@V Seminar
Speaker
Razieh Ranjbar (Ferdowsi University)
Event date
Venue
On-site: Sala Sousa Pinto
Event type

It has been believed that supermassive black holes (SMBHs) in the majority of nearby galaxies in the universe are powered by accretion flows. Observational evidence and many numerical simulations show of elliptical galaxies have revealed a surprising fact, in the densest regions of massive elliptical galaxies the hot gas rotates very slowly.

Dinner with many visitors

On Wednesday 18, we gathered for a dinner in town to celebrate our many visitors. While Víctor Jaramillo (University of Science and Technology of China), Raimon Luna and Milton Ruiz (both from University of Valencia) joined us for a week, we also welcomed longer term guests Ana Bokulić (University of Zagreb) and Razieh Ranjbar (Ferdowsi University).

Complex structures of boson stars and anisotropic distribution of satellite galaxies

GGD - Gr@V Seminar
Speaker
Víctor Jaramillo (University of Science and Technology of China)
Event date
Venue
On-site: Sala Sousa Pinto
Event type

We construct and explore Noether charge-swapping structures of boson stars, drawing inspiration from similar configurations of non-topological solitons in Minkowski space (Charge-swapping Q-balls). The resulting structures are dynamic, with a multipolar structure and both positive and negative Noether charges within a star.

Phase space mixing of a Vlasov gas in the exterior of a Kerr black hole

GGD - Gr@V Seminar
Speaker
Olivier Sarbach (Universidad Autónoma Metropolitana Cuajimalpa, Universidad Michoacana de San Nicolás de Hidalgo)
Event date
Venue
On-site: Sala Sousa Pinto
Event type

We analyze the dynamics of a collisionless kinetic gas propagating in the exterior of a rotating Kerr black hole. We focus on the phase space region corresponding to orbits that are bounded in space.