中微子湮灭与Poynting flux模型比较

Drenkhahn 2002, A&A
The initially released energy could leave the central
polluted region by neutrinos which annihilate to a
pair plasma further away (Berezinskii & Prilutskii 1987;
Goodman et al. 1987; Ruert et al. 1997). But due to the
small cross section of neutrinos the eciency is low and
most of the energy escapes as neutrinos.

A Poynting flux dominating outflow will naturally occur
if the compact object rotates and possesses a magnetic
field. The luminosity will be fed by the rotational energy
reservoir of the central object. Models involving an magnetised
torus around a black hole (Meszaros & Rees 1997)
or a highly magnetised millisecond pulsar (Usov 1992;
Kluzniak & Ruderman 1998; Spruit 1999) would produce
such a rotationally driven Poynting flux. Extraction of energy
from the central object by this magnetic process is
potentially very ecient and fast.