A Search for Protostellar Collapse in Late Class I Sources

Details A Search for Protostellar Collapse in Late Class I Sources A Search for Protostellar Collapse in Late Class I Sources

Oct 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aas...196.6307g&link_type=abstract

American Astronomical Society, 196th AAS Meeting, #63.07; Bulletin of the American Astronomical Society, Vol. 32, p.1286

Astronomy and Astrophysics

Astronomy

Scientific paper

Asymmetric spectra of optically thick spectral lines are associated with protostellar collapse in young stellar objects. Such asymmetries have been believed to be confined solely to the Class 0 stage, but collapse signatures have now been observed in Class I sources with Tbol < 200 K. We present partial results of a survey that extends earlier results in Class 0 and I sources of HCO+, a molecule that shows strong line asymmetry in simulations of collapsing clouds, to Class I sources with Tbol < 650 K to find when protostellar collapse ends and how infall motions change with time.

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