9 papers · 1 filter
The impact of a close stellar encounter on the Edgeworth-Kuiper Belt
Alice C. Quillen, David E. Trilling, Eric G. Blackman
We numerically investigate the possibility that a close stellar encounter could account for the high inclinations of the Kuiper belt, as originally proposed by Ida, Larwood and Bur…
Ejection of bi-helical fields from the sun
A. Brandenburg, E. G. Blackman
It is argued that much of the observed magnetic helicity losses at the solar surface may represent a reduction of an otherwise more dominant nonlinearity of solar and stellar dynam…
Dynamo-Driven Outflows in Pre-Planetary Nebulae
Eric G. Blackman
The plethora of asymmetric planetary nebulae and the curiously high momenta of pre-planetary nebula outflows suggest that rotational energy is extracted from the engines. Magneto-r…
Line Profiles from Different Accretion Engine Geometries
Eric G. Blackman, Sean A. Hartnoll
Line profiles represent an important probe of the geometry and dynamics of the central accretion engines in AGN. Although a flat disk illuminated from above can explain the relativ…
On Magnetic Field Amplification in Gamma-Ray Burst Sources
Eric G. Blackman
Magnetic fields play a dual role in gamma-ray bursts (GRBs). First, GRB and afterglow spectra (the latter interpreted as emission from external shocks) imply synchrotron radiation…
Recent Developments in Magnetic Dynamo Theory
Eric G. Blackman
Some recent results and open issues in magnetic dynamo theory are addressed. The distinction between small-scale and mean-field dynamo (MFD) action in forced turbulent flows is emp…