RECOMMENDED THERMAL RATE COEFFICIENTS FOR THE C + H3+REACTION AND SOME ASTROCHEMICAL IMPLICATIONS
(2016) The Astrophysical Journal : an international review of astronomy and astronomical physics — Vol. 832, n° 1, p. 31 (2016)
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- (en) We incorporate our experimentally derived thermal rate coefficients for C + H3+ forming CH+ and CH2 + 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 instead we use a more versatile fitting formula. At a temperature of 10 K and a density of 104 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. In addition, we find that the relatively small error on our thermal rate coefficients, ~15%, 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.
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Vissapragada, S., Buzard, C. F., Miller, K. A., O’Connor, A. P., Ruette, N. d., Urbain, X., & Savin, D. W. (2016). RECOMMENDED THERMAL RATE COEFFICIENTS FOR THE C + H3+REACTION AND SOME ASTROCHEMICAL IMPLICATIONS. The Astrophysical Journal : an international review of astronomy and astronomical physics, 832(1), 31. https://doi.org/10.3847/0004-637X/832/1/31 (Original work published 2016)