SIMBAD references

1998A&A...336..309T - Astronomy and Astrophysics, volume 336, 309-314 (1998/8-1)

The distribution of molecules in star-forming regions.


Abstract (from CDS):

A number of maps of low-mass star-forming regions have shown the molecule CS to be more widespread than NH3, 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 NH3 behaviour if mapped adequately in similar sources. The first family of early-time molecules, includes such species as CH4, CH3, H2CO, H2CS, HC3N, CN and HCN. The second family of late-time molecules includes the species HCO+, NO, OH, SO, N2H+, O2, N2 and OCN. The chemistry of these molecules is discussed.

Abstract Copyright:

Journal keyword(s): ISM: clouds - ISM: molecules - ISM: structure - molecular processes

Status at CDS:  

Simbad objects: 3

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