Black hole (BH) accretion flows and jets are qualitatively affected by the presence of ordered
magnetic fields. We study fully 3D global general relativistic magnetohydrodynamic (MHD) …

We consider an accretion flow model originally proposed by, which has been confirmed in
recent 3D MHD simulations. In the model, the accreting gas drags in a strong poloidal …

In this paper we present a compilation of results from our most advanced neutron star
merger simulations. Special aspects of these models were refered to in earlier publications …

The extreme hypothesis that essentially all types of ultrarelativistic outflow-specifically AGN
jets, pulsar wind nebulae and GRB-are electromagnetic, rather than gas dynamical …

Evolution characteristics of a Kerr black hole (BH) are investigated by considering the
coexistence of disc accretion with the Blandford–Znajek process (the BZ process) and …

We recall evidence that long gamma-ray bursts (GRBs) have binary progenitors and give
new examples. Binary-driven hypernovae (BdHNe) consist of a carbon–oxygen core …

Recent observations and theoretical work on gamma-ray bursts favor the central engine
model of a Kerr black hole (BH) surrounded by a magnetized neutrino-dominated accretion …

If a Kerr black hole is connected to a disk rotating around it by a magnetic field, the rotational
energy of the Kerr black hole provides an energy source for the radiation of the disk in …

QSOs are believed to be powered by accretion onto massive black holes (BHs). In this
paper, assuming that each central BH in nearby galaxies has experienced the QSO phase …

ABSTRACT A particularly interesting discovery in observations of GRB 121027A is that of a
giant X-ray bump detected by the Swift/X-Ray Telescope. The X-ray afterglow re-brightens …