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Table 1

PN core mass.

PNG name M/M  M/M 
H track He track

PN G021.1−05.9 0.615 0.617
PN G025.3−04.6 0.619 :0.634
PN G042.9−06.9 0.586 0.617
PN G048.5+ 04.2 0.583 0.584
PN G053.3+ 24.0 0.569 0.601
PN G068.7+ 14.8 0.732 ...
PN G079.9+ 06.4 0.597 0.600
PN G098.2+ 04.9 0.597 0.600
PN G107.4−02.6 0.569 0.567
PN G264.4−12.7 0.569 0.614
PN G275.3−04.7 :0.569 0.567
PN G285.4+ 01.5 :0.569 :0.567
PN G285.4+ 02.2 0.633 0.634
PN G289.8+ 07.7 :0.569 0.567
PN G294.9−04.3 0.569 0.617
PN G295.3−09.3 0.596 0.596
PN G296.3−03.0 0.569 0.567
PN G309.5−02.9 0.569 0.567
PN G324.8−01.1 :0.569 :0.567
PN G327.8−06.1 ... :0.567
PN G343.4+ 11.9 0.583 0.600
PN G344.2+ 04.7 ... :0.567
PN G351.3+ 07.6 0.552 0.584

Notes. The symbol “:” means the CS is under the lowest mass track but close enough that we can determine its mass.

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