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