Table 2: Some disk parameters of the (candidate) nanodiamond sources. The Meeus group indicates the overall geometry of the disk. The ratio of the total IR excess to the stellar luminosity, $L_{\rm exc}/L_\star $, indicates the fraction of stellar flux that is captured and reprocessed by the disk. For passive disks, this number represents the fraction of the sky covered by the disk, as seen from the central star. The ratio for T CrA is likely overestimated due to strong nearby IR emission, not directly linked to the system. The parameter n is the spectral index in the 450 $\mu $m-1.3 mm range, defined by $\lambda F_\lambda \propto \lambda ^{-n}$.
# Target Group $L_{\rm exc}/L_\star $ n
  Elias 3-1 I 0.5-1.3a 3.23 $\pm$ 0.03
33 HD 97048 I 0.40 >2.9
50 MWC 297 E 0.06 3.1 $\pm$ 0.2
47 V921 Sco E 0.11 4.1 $\pm$ 0.3
49 HD 163296 II 0.34 2.9 $\pm$ 0.1
57 T CrA II? 3.8 ?
  Median I 0.50 3.9
  Median II 0.44 3.0
  Median E 0.63 4.1
a For Elias 3-1 we used a stellar luminosity
of 20-50 $L_\odot$ (see Table 3).

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