Würzburg 2018 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

GR: Fachverband Gravitation und Relativitätstheorie

GR 8: Poster session (permanent)

GR 8.10: Poster

Mittwoch, 21. März 2018, 18:00–19:30, Phys-SR-SE2

Relativistic accretion of charged dust in Kerr-Newman spacetime — •Kris Schroven, Eva Hackmann, and Claus Lämmerzahl — University of Bremen, Center of Applied Space Technology and Microgravity (ZARM), 28359 Bremen, Germany

We use an analytical model to describe the accretion of a dilute collisionless plasma onto a rotating and charged black hole (BH). By assuming continuous injection of particles at the spherical shell, and by treating the BH and accretion disk as passive sinks of particles, the dicsussed model becomes stationary. The model may serve as a toy model for plasma feeding an accretion disk around a charged and rotating BH. Our main focus lies on the discussion of the influence of a very small BH net charge on the plasma accretion. We can demonstrate that, within our model, already a vanishingly small BH charge may in general have a non-negligible effect on the plasma's motion. Furthermore, we argue that the inner and outer edges of the forming accretion disk strongly depend on the charge of the accreted plasma. The resulting possible configurations of accretion disks are analyzed in detail.