Table 5 Comparing elemental abundances of IC 4642 with previous studies, Type I, non-Type I PNe, and the Sun.
From: Uncovering the integral spectral characteristics of the planetary nebula IC 4642
Element | Ours | P1 | P2 | P3 | P4 | P5 | Literature1 | Type I27 | non-Type I27 | Sun29 |
|---|---|---|---|---|---|---|---|---|---|---|
He/H | \(11.02 ^{+ 0.10 }_{ - 0.10 }\) | \(11.01 ^{+ 0.32 }_{ - 0.32 }\) | \(10.98 ^{+ 0.10 }_{ - 0.13 }\) | \(11.02 ^{+ 0.31 }_{ - 0.21 }\) | \(11.02 ^{+ 0.42 }_{ - 0.32 }\) | \(11.03 ^{+ 0.41 }_{ - 0.31 }\) | 11.20 | 11.01 | 11.00 | |
C/H | \(9.54 ^{+ 0.50 }_{ - 0.53 }\) | \(9.41 ^{+ 1.65 }_{ - 2.01 }\) | \(9.27 ^{+ 1.30 }_{ - 1.45 }\) | \(9.66 ^{+ 1.26 }_{ - 1.31 }\) | \(9.53 ^{+ 1.45 }_{ - 1.62 }\) | \(9.73 ^{+ 1.74 }_{ - 1.99 }\) | 8.70 | 8.93 | 8.43 | |
N/H | \(7.64 ^{+ 2.60 }_{ - 3.38 }\) | \(7.11 ^{+ 4.27 }_{ - 3.83 }\) | \(6.98 ^{+ 0.85 }_{ - 0.97 }\) | \(7.70 ^{+ 2.74 }_{ - 5.73 }\) | \(7.63 ^{+ 3.49 }_{ - 5.13 }\) | \(7.47 ^{+ 1.94 }_{ - 3.89 }\) | 8.77 | 8.17 | 7.83 | |
O/H | \(8.71 ^{+ 0.77 }_{ - 0.87 }\) | \(8.86 ^{+ 4.25 }_{ - 3.29 }\) | \(8.03 ^{+ 0.67 }_{ - 0.60 }\) | \(8.58 ^{+ 2.76 }_{ - 5.83 }\) | \(8.62 ^{+ 3.73 }_{ - 6.20 }\) | \(8.66 ^{+ 3.34 }_{ - 3.02 }\) | 8.33 | 8.60 | 8.60 | 8.69 |
Ne/H | \(8.17 ^{+ 1.00 }_{ - 1.22 }\) | \(8.29 ^{+ 4.42 }_{ - 4.98 }\) | \(8.46 ^{+ 1.25 }_{ - 1.17 }\) | \(8.07 ^{+ 2.83 }_{ - 6.55 }\) | \(8.03 ^{+ 3.83 }_{ - 3.23 }\) | \(8.19 ^{+ 3.51 }_{ - 4.09 }\) | 7.98 | 8.16 | 8.02 | 7.93 |
Ar/H | \(6.60 ^{+ 0.63 }_{ - 0.67 }\) | \(6.72 ^{+ 2.47 }_{ - 3.91 }\) | \(6.03 ^{+ 0.57 }_{ - 0.57 }\) | \(6.44 ^{+ 1.62 }_{ - 2.88 }\) | \(6.37 ^{+ 2.04 }_{ - 5.17 }\) | \(6.55 ^{+ 1.83 }_{ - 4.55 }\) | 6.48 | 6.61 | 6.40 | 6.40 |
S/H | \(6.88 ^{+ 2.35 }_{ - 3.57 }\) | \(6.61 ^{+ 4.22 }_{ - 1.39 }\) | \(6.47 ^{+ 1.11 }_{ - 1.35 }\) | \(6.53 ^{+ 2.30 }_{ - 3.02 }\) | \(6.55 ^{+ 2.45 }_{ - 2.05 }\) | \(6.61 ^{+ 1.56 }_{ - 3.03 }\) | 7.04 | 6.75 | 7.20 | |
Cl/H | \(5.07 ^{+ 0.52 }_{ - 0.56 }\) | \(5.16 ^{+ 2.09 }_{ - 3.54 }\) | \(5.31 ^{+ 0.29 }_{ - 0.32 }\) | \(4.80 ^{+ 1.43 }_{ - 2.69 }\) | \(4.87 ^{+ 1.85 }_{ - 4.48 }\) | \(4.93 ^{+ 1.73 }_{ - 4.52 }\) | 5.58 | 5.18 | 5.50 | |
N/O | 0.09 | 0.02 | 0.09 | 0.13 | 0.10 | 0.06 | 1.51 | 0.37 | 0.14 |