Dynamics and Depletion in Thermally Supercritical Starless Cores

Details Dynamics and Depletion in Thermally Supercritical Starless Cores Dynamics and Depletion in Thermally Supercritical Starless Cores

2009-08-17

arxiv.org/abs/0908.2400v2

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

accepted for publication in MNRAS

Scientific paper

In previous studies we identified two classes of starless cores, thermally subcritical and supercritical, distinguished by different dynamical behavior and internal structure. Here we study the evolution of the dynamically-unstable, thermally-supercritical cores by means of a numerical hydrodynamic simulation that includes radiative equilibrium and simple molecular chemistry. We use our non-LTE radiative transfer code MOLLIE to predict observable CO and N2H+ line spectra, including the non-LTE hyperfine ratios of N2H+, during the contraction. These are compared against observations of the starless core L1544.

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