The chemical history of molecules in circumstellar disks - I. Ices

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Table 1:

Summary of the parameter grid used in our model^a.
Case^b	$\Omega_0$	$c_{\rm s}$	M₀	$t_{\rm acc}$	$\tau_{\rm ads}$	$M_{\rm d}$
	(s^-1)	(km s^-1)	( $M_\odot$ )	(10⁵ yr)	(10⁵ yr)	( $M_\odot$ )
1	10^-14	0.19	1.0	6.3	14.4	0.22
2	10^-14	0.19	0.5	3.2	3.6	0.08
3 (std)	10^-14	0.26	1.0	2.5	2.3	0.05
4	10^-14	0.26	0.5	1.3	0.6	0.001
5	10^-13	0.19	1.0	6.3	14.4	0.59
6	10^-13	0.19	0.5	3.2	3.6	0.25
7 (ref)	10^-13	0.26	1.0	2.5	2.3	0.43
8	10^-13	0.26	0.5	1.3	0.6	0.16

^a $\Omega_0$ : solid-body rotation rate; $c_{\rm s}$ : effective sound speed; M₀: initial envelope mass; $t_{\rm acc}$ : accretion time; $\tau_{\rm ads}$ : adsorption timescale for H₂O at the edge of the initial cloud; $M_{\rm d}$ : disk mass at $t_{\rm acc}$ .
^b Case 3 is our standard parameter set and Case 7 is our reference set.

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