The distribution of molecules in star-forming regions

Details The distribution of molecules in star-forming regions The distribution of molecules in star-forming regions

Aug 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998a%26a...336..309t&link_type=abstract

Astronomy and Astrophysics, v.336, p.309-314 (1998)

Astronomy and Astrophysics

Astrophysics

17

Ism: Clouds, Ism: Molecules, Ism: Structure, Molecular Processes

Scientific paper

A number of maps of low-mass star-forming regions have shown the molecule CS to be more widespread than NH_3, despite having a higher critical density in the transitions in question. In a previous paper a model was presented of unresolved clumps around the star-forming core. The clumps are transient and exhibit emission only from molecules that form quickly. In this paper it is shown how families of molecules can be found that ought to follow either the CS or NH_3 behaviour if mapped adequately in similar sources. The first family of early-time molecules, includes such species as CH_4, CH_3, H_2CO, H_2CS, HC_3N, CN and HCN. The second family of late-time molecules includes the species HCO(+) , NO, OH, SO, N_2H(+) , O_2, N_2 and OCN. The chemistry of these molecules is discussed.

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