Shocks in dense clouds - II. Dust destruction and SiO formation in J shocks

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Volume 497 / No 1 (April I 2009)

A&A, 497 1 (2009) 145-153

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Table 1:

Percentage of Si, Fe, Mg and C released into the gas phase in transverse J shocks.
Element	Pre-shock density	$V_{\rm crit}$			Shock velocity $V_{\rm s}$ ( km s^-1)
	( cm^-3)	( km s^-1)	25	30	35	40	45	50
	10⁴	21	0.3%	0.6%	1.0%	1.3-1.6%	1.5-2.5%	1.9-3.8%
Si, Fe, Mg	10⁵	24	0.1%	0.4%	0.7%	1.0%	1.2-1.5%	1.5-2.0%
	10⁶	28	...	0.2%	0.4%	0.6%	0.8-1.0%	1.0-1.5%
	10⁴, 10⁵, 10⁶ with B = 0	0.3	0.004%	0.04%	0.14%	0.26%	0.38%	0.50%
	10⁴	21	0.2%	0.4%	0.7%	1.0%	1.1-1.4%	1.4-1.9%
C	10⁵	24	0.06%	0.25%	0.50%	0.7%	0.9%	1.0-1.2%
	10⁶	28	...	0.1%	0.25%	0.4%	0.6%	0.7-0.9%
	10⁴, 10⁵, 10⁶ with B = 0	0.3	0.001%	0.01%	0.06%	0.13%	0.20%	0.26%

Notes: $V_{\rm crit}$ is the critical shock velocity below which J shocks cease to exist (Eq. (1)). The initial core size distribution is a MRN over [100-3000 Å] (see Sect. 3.1). When ranges are given, the lower limit corresponds to pure vaporisation with negligible erosion (sputtering yields from May et al. 2000), while the upper limit corresponds to the total of vaporisation and erosion with the Tielens et al. (1994) sputtering yields. We assume b=1, as per Eq. (2), unless specified.

Source LaTeX | All tables | In the text

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