Table 1.From: The 21-μm and 30-μm circumstellar dust features in evolved C-rich objectsThe 21 μm feature sources. The numbers under the “30 μm” and “21 μm” labels are the fractions of the total IR flux emitted in the 30-μm feature or the 21-μm feature (in case no numbers are given, ✓ means detected).Back to article page