Lower mass limit of an evolving interstellar cloud and chemistry in an evolving oscillatory cloud

Details Lower mass limit of an evolving interstellar cloud and chemistry in an evolving oscillatory cloud Lower mass limit of an evolving interstellar cloud and chemistry in an evolving oscillatory cloud

Oct 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986inpr.conf...40t&link_type=abstract

In NASA. Ames Research Center Summer School on Interstellar Processes: Abstracts of Contributed Papers p 40 (SEE N87-15043 06-9

Astronomy and Astrophysics

Astronomy

Astronomical Models, Collapse, Critical Mass, Evolution (Development), Interstellar Chemistry, Interstellar Matter, Molecular Clouds, Star Formation, Equations Of Motion, Equations Of State, Mass Distribution, Oscillations

Scientific paper

Simultaneous solution of the equation of motion, equation of state and energy equation including heating and cooling processes for interstellar medium gives for a collapsing cloud a lower mass limit which is significantly smaller than the Jeans mass for the same initial density. The clouds with higher mass than this limiting mass collapse whereas clouds with smaller than critical mass pass through a maximum central density giving apparently similar clouds (i.e., same Av, size and central density) at two different phases of its evolution (i.e., with different life time). Preliminary results of chemistry in such an evolving oscillatory cloud show significant difference in abundances of some of the molecules in two physically similar clouds with different life times. The problems of depletion and short life time of evolving clouds appear to be less severe in such an oscillatory cloud.

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