The following document lists the file abstract/RBACHILL_YOUNGJET.abs
from catalogue VI/111.
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Bipolar outflows are a basic ingredient in the process of star formation. The Extremely-High-Velocity (EHV) molecular flows are particularly interesting, since they represent the *youngest* stage of the bipolar outflow phenomenon. Such young outflows are associated with the youngest (proto)stellar objects known so far, and are still deeply embedded in the parent molecular clouds. Shock waves generated by the outflowing motions are the origin of highly-excited neutral (or weakly ionized) gas that is best observed in the infrared. In fact, the most important cooling lines are expected to occur in the wavelength range of the ISO spectrometers. We propose to obtain high-sensitivity spectra toward prototypical young molecular outflows. Full grating spectra will be obtained toward the most important sources (L1157, IRAS2005, and IC348). Moreover, since young outflows exhibit EHV molecular lines of about 100 to 200 km/s, a study or their kinematics is possible with the ISO instruments. Thus, we propose to obtain high-spectral resolution (FP) observations of some key cooling lines ([OI], [CII]) toward some positions carefully selected from our previous molecular (mm, near-IR) studies. The proposed observations complement the ISO Central Programme observations which are mainly addressing much more evolved, bipolar outflows (similar to L1551). The ISO observations of the youngest outflows proposed here are expected to provide important insights in the processes of star formation, and will be very important for the understanding of the genesis and evolution of bipolar outflows in general.