Publications of the MPIfR
Optical & Infrared
Interferometry Group
Arce, H., Shepherd, D., Gueth, F., Lee,
C.-F., Bachiller, R., Rosen, A., Beuther, H.
Molecular Outflows in Low- and High-Mass
Star-forming Regions
Protostars & Planets V
Meeting held Oct. 24-28,
2005 in Hawaii, USA.
Protostars and Planets V
B. Reipurth, D. Jewitt, and K. Keil (eds.)
University of Arizona Press, Tucson, 951, p.245-260 (2007)
Abstract
We review the known properties of molecular outflows from low- and
high-mass
young stars. General trends among outflows are identified, and the most
recent studies
on the morphology, kinematics, energetics, and evolution of molecular
outflows are
discussed, focusing on results from high-resolution millimeter
observations. We
review the existing four broad classes of outflow models and compare
numerical
simulations with the observational data. A single class of models
cannot explain the
range of morphological and kinematic properties that are observed, and
we propose
a possible solution. The impact of outflows on their cloud is examined,
and we
review how outflows can disrupt their surrounding environment, through
the clearing
of gas and the injection of momentum and energy onto the gas at
distances from
their powering sources from about 0.01 to a few pc. We also discuss the
effects of
shock-induced chemical processes on the ambient medium, and how these
processes
may act as a chemical clock to date outflows. Lastly, future outflow
research with
existing and planned millimeter and submillimeter instruments is
presented.
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