Recommended Thermal Rate Coefficients for the C + H$_3^+$ Reaction and   Some Astrochemical Implications
  We have incorporated our experimentally derived thermal rate coefficients for C + H$_3^+$ forming CH$^+$ and CH$_2^+$ into a commonly used astrochemical model. We find that the Arrhenius-Kooij equation typically used in chemical models does not accurately fit our data and use instead a more versatile fitting formula. At a temperature of 10 K and a density of 10$^4$ cm$^{-3}$, we find no significant differences in the predicted chemical abundances, but at higher temperatures of 50, 100, and 300 K we find up to factor of 2 changes. Additionally, we find that the relatively small error on our thermal rate coefficients, $\sim15\%$, significantly reduces the uncertainties on the predicted abundances compared to those obtained using the currently implemented Langevin rate coefficient with its estimated factor of 2 uncertainty. 
S. Vissapragada, C. F. Buzard, K. A. Miller, A. P. O'Connor, N. de   Ruette, X. Urbain, and D. W. Savin
astro-ph.IM astro-ph.GA