Physical structure and dust reprocessing in a sample of HH jets

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Table 1:

Gas-phase abundance of calcium with respect to solar Abundances.
Jet	[Ca] $_{\rm gas}$ /[Ca] $_{\rm solar}$ ^a
HH 111	0.21-0.52
HH 1	0.25-0.79
HH 83	0.53-1.57^*
HH 24 A	0.40-0.69^*
HH 24 E	0.62-0.85^*
HH 24 C	0.52-0.82^*
HH 34^b	0.3-1
Orion Cloud^c	0.01

^a (Ca/H) solar abundance from Asplund et al. (2005): $2.04\times 10^{-6}$ ; ^b from Podio et al. (2006); ^c (Ca/H) abundance estimated in the interstellar medium in Orion by Baldwin et al. (1991): $2 \times 10^{-8}$ ; ^* the values of [Ca] $_{\rm gas}$ /[Ca] $_{\rm solar}$ for HH 83 and HH 24 have been estimated assuming $A_{\rm V}=0$ , thus they are upper limits to the real values.

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