Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988mnras.235.1257c&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 235, Dec. 15, 1988, p. 1257-1271. Research supported by
Astronomy and Astrophysics
Astronomy
47
Astronomical Models, Interstellar Chemistry, Molecular Clouds, Star Formation, Stellar Mass, Chemical Evolution, Expansion, Infrared Sources (Astronomy)
Scientific paper
Barnard 5 (B5) is a nearby, clumpy region in which low-mass star formation is occurring. The authors have calculated the chemical evolution for three variants of the dynamics of B5. In all of these models, interclump gas collapses to produce clumps which are dispersed by the stars which form; molecular gas cycles repeatedly between clump and interclump phases and during the dispersal interval may mix with ionized gas in the stellar winds. The authors find that the general chemical structure attains an approximate limit cycle in each of these models. During each dynamical cycle in each model, the molecular abundances vary substantially as functions of time; the time variations differ markedly between the models. The results of high resolution mapping of chemical abundances in B5, which because of its proximity is an ideal source for such studies, should be a good test of these calculations.
Charnley Steven B.
Dyson John E.
Hartquist Thomas W.
Williams David. A.
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