Table 12: Estimates of the X-ray luminosity in low-mass objects from the observed CN abundances.
Source $r_{\rm beam}$ $n_{\rm H}({r_{\rm beam}})$ X-ray luminosity $L_{\rm X}$
  AU cm-3 erg s-1

IRAS 16293		 1120 107 $\gtrsim$ $4\times 10^{29}$
N1333-I2 1540 106 $\gtrsim$ $7\times 10^{29}$
N1333-I4A 1540 107 $\gtrsim$ $7\times 10^{29}$
L1448-C 1540 106 $\gtrsim$ $7\times 10^{30}$
L483 1400 106 $\gtrsim$ $6\times 10^{30}$
L723 2100 106 $\gtrsim$ $1\times 10^{31}$
SMM4 1750 106 $\gtrsim$ $1\times 10^{30}$
V1057 Cyg 4550 105 $\gtrsim$ $6\times 10^{30}$
L1489 980 105 $\gtrsim$ $8\times 10^{29}$


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