Other
Scientific paper
Sep 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999mnras.308..271f&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Volume 308, Issue 1, pp. 271-280.
Other
21
Scientific paper
We have computed the time dependence of the H_2 rovibrational emission spectrum from molecular outflows. This emission arises in shock waves generated by the impact of jets, associated with low-mass star formation, on molecular gas. The shocks are unlikely to have attained a state of equilibrium, and so their structure will exhibit both C- and J-type characteristics. The rotational excitation diagram is found to provide a measure of the age of the shock; in the case of the outflow observed in Cepheus A West by the ISO satellite, the shock age is found to be approximately 1.5x10^3yr. Emission by other species, such as NH_3 and SiO, is also considered, as are the intensities of the fine-structure transitions of atoms and ions.
Flower David R.
Pineau des Forêts Guillaume
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