The 2024 KIDA network for interstellar chemistry | Astronomy & Astrophysics (A&A)

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Volume 689 (September 2024)

A&A, 689 (2024) A63

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Table 2

Species with significant abundance differences in the model predictions using kida.uva.2014 or kida.uva.2024.

Species	Ratio	Species	Ratio	Species	Ratio	Species	Ratio
HCl	−0.5	PN	−0.8	SiC	0.5	SO	−0.9
CCS	−0.5	CCO	0.7	HNSi	0.7	C₃O	−0.8
C₃S	−2.3	H₂CO	−2.0	NH₃	−2.3	HCCSi	−0.9
l-C₃H	−0.7	C₆H₆	−0.6	H₂CCO	−2.7	c-C₃H₂	−0.5
HCNCC	−0.5	HCCNC	−0.4	HNCCC	−0.5	l-C₃H₂	−2.0
NC₄N	−0.5	C₄H₂	−0.4	C₅H	−0.5	C₅N	−0.6
C₆	−0.5	C₅O	−0.6	C₅H₂	−0.6	C₆H	−0.7
C₇	−0.6	HC₅N	−0.6	C₆N	−0.6	NC₆N	−0.5
C₆H₂	−0.8	C₇H	−0.7	C₇N	−0.8	C₈	−0.6
C₇O	−0.8	C₇H₂	−0.8	C₈H	−0.7	C₉	−0.6
HC₇N	−1.0	C₈N	−0.8	C₈H₂	−0.8	C₉H	−0.7
C₁₀	−0.7	C₉N	−0.8	C₁₀H	−0.7	C₁₁	−0.7
C⁺	−0.3	Na⁺	0.3	S⁺	0.6	Si⁺	1.5
CF⁺	−0.4	SO⁺	−0.5	CN⁻	−0.6	CHSi⁺	5.6
HSiO⁺	−0.7	H₂CCO₊	−1.1	H₂COH⁺	−1.8	HC₃O⁺	0.8
HC₃S⁺	−0.5	$1 - C_{3} H_{2}^{+}$ $1 - {{\rm{C}}_3}{\rm{H}}_2^ +$	−0.3	$C_{5}^{-}$ ${\rm{C}}_{\rm{5}}^ -$	−0.4	CH₃CO⁺	−0.7
HC₃NH⁺	−0.9	$C_{4} H_{2}^{+}$ ${{\rm{C}}_4}{\rm{H}}_2^ +$	−0.6	C₅H⁺	−0.4	H₂C₃O⁺	3.1
HC₄O⁺	−0.6	C₅H⁻	−0.5	$C_{6}^{-}$ ${\rm{C}}_6^ -$	−0.5	$C_{4} H_{3}^{+}$ ${{\rm{C}}_4}{\rm{H}}_3^ +$	−0.9
$C_{5} H_{2}^{+}$ ${{\rm{C}}_5}{\rm{H}}_2^ +$	−0.7	$C_{7}^{-}$ ${\rm{C}}_7^ -$	−0.6	C₇H⁻	−0.7	$C_{8}^{-}$ ${\rm{C}}_8^ -$	−0.6
$C_{9}^{-}$ ${\rm{C}}_9^ -$	−0.6

Notes. Species with abundance ratios log(X_new/X_old) smaller than −0.3 or larger than 0.3 at 10⁵ yr and with an abundance larger than 10⁻¹² using the new network compared with the total H density. The abundances were computed for a standard cold dense core gas-phase only model (See text for input parameter values).

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