4 papers · 1 filter
Massive black hole binary mergers within sub-pc scale gas discs
J. Cuadra, P. J. Armitage, R. D. Alexander +1
[ABRIDGED] We study supermassive black hole binary mergers driven by angular momentum loss to small-scale gas discs. Such binaries form after major galaxy mergers, but their fate i…
On the Evolution of and High-Energy Emission from GHz-Peaked-Spectrum Sources
L. Stawarz, L. Ostorero, M. C. Begelman +3
Here we discuss evolution and broad-band emission of compact (< kpc) lobes in young radio sources. We propose a simple dynamical description for these objects, consisting of a rela…
Accretion Discs with Strong Toroidal Magnetic Fields
M. C. Begelman, J. E. Pringle
Simulations and analytic arguments suggest that the turbulence driven by magnetorotational instability (MRI) in accretion discs can amplify the toroidal (azimuthal) component of th…
The Nature of SS433 and the Ultraluminous X-ray Sources
M. C. Begelman, A. R. King, J. E. Pringle
The periodic precession (162--day) and nodding (6.3--day) motions of the jets in SS433 are driven in the outer regions of the disc, whereas the jets themselves, being relativistic,…