Extended Data Fig. 6: Comparison of the C and N isotopic composition of the 4 analyzed UCAMMs with literature data.
From: Nitrogen-rich organics from comets probed by ultra-carbonaceous Antarctic micrometeorites
(a, b) DC06-94, DC06-43, DC06-18 and DC16-309 are in gray, blue, green and red contours. Literature data for IDPs (a) and carbonaceous matter from meteorites (b) are superimposed. Bulk IDPs10,11,12,13,14,15 and hotspots in IDPs11,12,13,14 are indicated in the panel a) as dark gray dots and yellow dots with one standard deviation error bars. Bulk IOM data are indicated as large diamonds in orange (CR), red (CM), yellow (CI) and pink (CO)1. Carbonaceous grains in CR, CM, CI and CO3,5,6,7,8,9 are indicated as small diamonds with the same color code. The average composition of carbonaceous asteroid Ryugu grains18 from the Hayabusa2 JAXA return sample mission is reported as a yellow star. The shaded area and the ellipse represent the range of variation of the solar δ15N and δ13C value.
