CS Lines Profiles in Hot Cores

Details CS Lines Profiles in Hot Cores CS Lines Profiles in Hot Cores

2010-11-05

arxiv.org/abs/1011.1406v1

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

17 pages, 5 figures, 1 table, In press in ApJ

Scientific paper

We present a theoretical study of CS line profiles in archetypal hot cores. We provide estimates of line fluxes from the CS(1-0) to the CS(15-14) transitions and present the temporal variation of these fluxes. We find that \textit{i)} the CS(1-0) transition is a better tracer of the Envelope of the hot core whereas the higher-J CS lines trace the ultra-compact core; \textit{ii)} the peak temperature of the CS transitions is a good indicator of the temperature inside the hot core; \textit{iii)} in the Envelope, the older the hot core the stronger the self-absorption of CS; \textit{iv)} the fractional abundance of CS is highest in the innermost parts of the ultra-compact core, confirming the CS molecule as one of the best tracers of very dense gas.

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