2009/05/06 by Catherine Walsh, Nanase Harada, Eric Herbst +1 · 1 citation
Physics and Astronomy · #astro-ph.GA
paper · pdf · doi:10.1088/0004-637x/700/1/752
published as Astrophys.J.700:752-761,2009 · Accepted for publication in ApJ, 24 pages, 5 figures
arxiv created 2009/05/06 · arxiv updated 2009/12/01
We have investigated the role of molecular anion chemistry in pseudo-time dependent chemical models of dark clouds. With oxygen-rich elemental abundances, the addition of anions results in a slight improvement in the overall agreement between model results and observations of molecular abundances in TMC-1 (CP). More importantly, with the inclusion of anions, we see an enhanced production efficiency of unsaturated carbon-chain neutral molecules, especially in the longer members of the families CnH, CnH2, and HCnN. The use of carbon-rich elemental abundances in models of TMC-1 (CP) with anion chemistry worsens the agreement with observations obtained in the absence of anions.