Jd. Fiege et Rn. Henriksen, A GLOBAL-MODEL OF PROTOSTELLAR BIPOLAR OUTFLOW .1., Monthly Notices of the Royal Astronomical Society, 281(3), 1996, pp. 1038-1054
This paper presents a relatively realistic model for bipolar outflow f
rom the region surrounding a point-mass core in a molecular cloud, bas
ed on the idea of steady quadrupolar circulation that was suggested pr
eviously, We include here compressibility and 'central heating' in add
ition to the pressure centrifugal and magnetic effects included in the
earlier 'cored apple' models. This heating is necessary in order to o
btain a high-velocity outflow along the field lines, and especially in
order to create a light low-mass 'jet' outflow along the axis of a th
ick disc, which in turn forms an integral part of a more massive, lowe
r velocity circulation. Although it is possible to include Poynting fl
ux driving of the outflow in our models, we proceed first to study exh
austively the cases where it is absent. In part I of this series we gi
ve a discussion of the dynamics of solutions that possess realistic ph
ysical parameters. These solutions are used in Paper II to create synt
hetic line profiles and radio maps of these solutions in typically opt
ically thin molecular lines, which allow direct comparison with the ob
servations. This seems to be the first time that a model has been put
to such a test, The required central heating may be radiative (for hig
h-luminosity sources) or dissipative owing to an anomalous viscosity a
nd resistivity (which permits magnetic reconnection).