Evidence for core collapse toward 3 young stellar clusters

Details Evidence for core collapse toward 3 young stellar clusters Evidence for core collapse toward 3 young stellar clusters

Feb 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aipc..393..387w&link_type=abstract

The seventh astrophysical conference: Star formation, near and far. AIP Conference Proceedings, Volume 393, pp. 387-390 (1997).

Astronomy and Astrophysics

Astrophysics

2

Pre-Main Sequence Objects, Young Stellar Objects And Protostars, Open Clusters In The Milky Way, Origin, Formation, Evolution, Age, And Star Formation, Star Formation

Scientific paper

Observations of CS(2-1) and N2H+ (1-0) emission toward three young stellar clusters, Serpens NW, NGC1333-IRAS4, and L1251B are discussed. Comparison of the spectra shows that the CS is self-absorbed in many positions, and generally in an asymmetric way (the blue side of the line being of greater intensity than the red) that is characteristic of inward motions onto a warm central core. The predominance for the asymmetry to indicate infall, rather than outflow, in many positions in each core, and in all three sources, suggests that the effect is real, and that large scale core collapse is being observed. A simple one-dimensional model is described and fit to the line profiles resulting in an estimate of the mass infall rate in each case.

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