Evaluating Early-time vs. Late-time Chemical Evolutionary Tracers in Starless Cores

Details Evaluating Early-time vs. Late-time Chemical Evolutionary Tracers in Starless Cores Evaluating Early-time vs. Late-time Chemical Evolutionary Tracers in Starless Cores

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21943922r&link_type=abstract

American Astronomical Society, AAS Meeting #219, #439.22

Astronomy and Astrophysics

Astronomy

Scientific paper

Starless cores are the earliest observable phase of star formation and represent the initial conditions of protostar and disk formation. Mapping observations of molecular species toward starless cores indicate that starless cores are dynamically evolving at different rates and that the chemical evolutionary history is encoded within the observed molecular distributions. The current generation of chemo-dynamical models make general predictions about the abundance variations of species with many molecules separated into "early-time” (high abundances early in evolution) and "late-time” species. In this poster, we test the viability of SO and NO as "early time” and "late time” species by comparing to observations of known "late time” and "early time” molecules (e.g. NH3, CCS, etc.).

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