Impact of the transport of magnetospheric electrons on the composition of the Triton atmosphere

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Volume 686 (June 2024)

A&A, 686 (2024) A22

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Table B.3

Comparison of the key chemical reactions obtained in this work with a slightly modified version of the model of Benne et al. (2022), based on the nominal results.

Reaction	This work		Benne et al. (2022)
	Species (Production)	Species (Loss)	Species (Production)	Species (Loss)
CH₄+hv → ¹CH₂+H₂	H₂(33%)	CH₄(34%)	H₂(34%)	CH₄(35%)
CH₄+hv → CH₃+H	H(27%)	CH₄(29%)	H(30%)	CH₄(30%)
H+³CH₂ → CH+H₂	H₂(47%)	H(53%)	H₂(48%)	H(56%)
CH+CH₄ → C₂H₄+H	C₂H₄(73%); H(21%)	CH₄(23%)	C₂H₄(73%); H(23%)	CH₄(22%)
H+HCNN → ¹CH₂+N₂	N₂(23%)	H(32%)	N₂(17%)	H(34%)
$N_{2} + h v \to N_{2}^{+} + e^{-}$ ${{\rm{N}}_2} + hv \to {\rm{N}}_2^ + + {{\rm{e}}^ - }$	e⁻(48%); $N_{2}^{+} (55 %)$ ${\rm{N}}_2^ + (55{\rm{\% }})$		e⁻(26%); $N_{2}^{+} (31 %)$ ${\rm{N}}_2^ + (31{\rm{\% }})$
N₂+hv → N(⁴S)+N(²D)	N(⁴S)(11%);N(²D)(20%)
$N_{2} + e^{-} \to N_{2}^{+} + 2 e^{-}$ ${{\rm{N}}_2} + {{\rm{e}}^ - } \to {\rm{N}}_2^ + + 2{{\rm{e}}^ - }$	e⁻(39%); $N_{2}^{+} (45 %)$ ${\rm{N}}_2^ + (45{\rm{\% }})$		e⁻(57%); $N_{2}^{+} (69 %)$ ${\rm{N}}_2^ + (69{\rm{\% }})$
N2+e⁻ → N(⁴S)+N(²D)+e⁻	N(⁴S)(12%); N(²D)(21%)		N(⁴S)(13%); N(²D)(24%)
$N_{2}^{+} + H_{2} \to N_{2} H^{+} + H$ ${\rm{N}}_2^ + + {{\rm{H}}_2} \to {{\rm{N}}_2}{{\rm{H}}^ + } + {\rm{H}}$		H₂(51%); $N_{2}^{+} (37 %)$ ${\rm{N}}_2^ + (37{\rm{\% }})$		H₂(52%); $N_{2}^{+} (15 %)$ ${\rm{N}}_2^ + (15{\rm{\% }})$
$N_{2}^{+} + e^{-} \to N (^{4} S) + N (^{2} D)$ ${\rm{N}}_2^ + + {{\rm{e}}^ - } \to {\rm{N}}\left( {^4{\rm{S}}} \right) + {\rm{N}}\left( {^2{\rm{D}}} \right)$	N(²D)(16%)	e⁻(26%); $N_{2}^{+} (29 %)$ ${\rm{N}}_2^ + (29{\rm{\% }})$	N(⁴S)(11%); N(² D)(20%)	e⁻(35%); $N_{2}^{+} (42 %)$ ${\rm{N}}_2^ + (42{\rm{\% }})$
$N_{2}^{+} + e^{-} \to N (^{2} D) + N (^{2} D)$ ${\rm{N}}_2^ + + {{\rm{e}}^ - } \to {\rm{N}}\left( {^2{\rm{D}}} \right) + {\rm{N}}\left( {^2{\rm{D}}} \right)$	N(²D)(27%)	e⁻(22%); $N_{2}^{+} (25 %)$ ${\rm{N}}_2^ + (25{\rm{\% }})$	N(²D)(33%)	e⁻(30%); $N_{2}^{+} (36 %)$ ${\rm{N}}_2^ + (36{\rm{\% }})$
N(⁴S)+CN → N₂+C	C(72%)	N(⁴S)(20%)	C(69%); N₂(17%)	N(⁴S)(37%)
N(²D)+CO → N(⁴S)+CO	N(⁴S)(56%)	N(²D)(93%)	N(⁴S)(48%)	N(²D)(77%)
H⁺+HCN → HNC⁺+H		H+(22%); HCN(87%)		H⁺(28%); HCN(70%)

Notes. The key chemical reactions are the reactions that contribute more than 10% of the total integrated production or loss of at least two of the main atmospheric species from this work.

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