2002/11/24 by Neal J. Evans, N. J. Evans II, Evans, N. J.
Chemistry · Earth and Planetary Sciences · Physics and Astronomy · #Astro and Planetary Science #Astrophysics (astro-ph) #Atmospheric Ozone and Climate #FOS: Physical sciences #Molecular Spectroscopy and Structure #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/0211526
arxiv created 2002/11/24 · openalex publication_date 2002/11/24 · arxiv updated 2009/12/01 · openalex created_date 2022/08/27 · openalex updated_date 2026/07/28
The study of protostellar collapse or infall has proven unusually difficult and controversial. Some historical context will be provided, against which recent advances can be measured. We now have a substantial number of objects with signatures that can be interpreted in terms of collapse, but a number of issues remain. One issue is the effect of chemical variations, especially depletion in the dense, cold interiors of cores that are likely to form low mass stars. Strategies for dealing with this issue depend on using dust emission to constrain the density and temperature distribution, leaving molecular line observations to constrain dynamics and abundance distributions. Recent progress in this area will be described and we will consider the next challenges to be overcome. Interferometeric observations, especially with future instruments, will provide a powerful tool. In combination with chemical studies coupled with dynamical models, the observations made possible by interferometers should finally put this subject on a firm foundation.