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J/A+A/279/567 Abundances of non-type I PNe in LMC (Freitas Pacheco+ 1993)
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Abundances of non-type I planetary nebulae in the LMC
de Freitas Pacheco J.A., Costa R.D.D., Maciel W.J.
<Astron. Astrophys. 279, 567 (1993)>
=1993A&A...279..567D
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ADC_Keywords: Planetary nebulae ; Spectroscopy ; Abundances
Keywords: ISM: planetary nebulae : general - Magellanic Clouds -
Galaxies: abundances
Abstract:
Spectroscopic observations, plasma diagnostics and chemical
composition of 15 non-type I planetary nebulae (PNe) in the Large
Magellanic Cloud (LMC) are reported. Abundances of He, O, N, S, and Ar
are determined and compared with recently obtained data for nebulae
both in the Magellanic Clouds and in the Galaxy.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 164 29 Line intensities for the nebulae
table3.dat 31 15 Physical properties
table4.dat 68 15 Elemental abundances
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- --- [SMP]
5- 6 I2 --- SMP SMP number of the nebula
8 A1 --- n_I [c] When blank, observed fluxes,
when c, extinction-corrected fluxes
12- 15 F4.1 --- I4340 ? Hgamma line intensity (1)
17 A1 --- u_I4340 uncertainty flag on I4340
20- 23 F4.1 --- I4363 ? line intensity [OIII] (1)
25 A1 --- u_I4363 uncertainty flag on I4363
28- 31 F4.1 --- I4686 ? line intensity HeII (1)
35- 37 I3 --- I4861 [100] Hbeta line intensity
42- 45 I4 --- I5007 line intensity [OIII] (1)
48- 50 F3.1 --- I5411 ? line intensity HeII (1)
56- 59 F4.2 --- I5754 ? line intensity [NII] (1)
60 A1 --- u_I5754 uncertainty flag on I5754
63- 66 F4.1 --- I5876 line intensity HeI (1)
71- 74 F4.1 --- I6300 line intensity [OI] (1)
80- 83 F4.2 --- I6312 line intensity [SIII] (1)
86- 88 I3 --- I6563 Halpha line intensity (1)
94- 98 F5.1 --- I6584 line intensity [NII] (1)
103-106 F4.1 --- I6678 ? line intensity HeI (1)
111-114 F4.1 --- I6724 line intensity [SII] (1)
120-122 F3.1 --- I7005 ? line intensity [ArV] (1)
127-130 F4.1 --- I7065 ? line intensity HeI (1)
135-138 F4.1 --- I7135 line intensity [ArIII] (1)
143-146 F4.1 --- I7325 line intensity [OII] (1)
152-155 F4.2 --- R(SII) ? intensity ratio of SII lines 6716/6730
160-163 F4.2 mag E(B-V) ? Colour excess
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Note (1): the intensity is scaled to H{beta}=100
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- --- [SMP]
5- 6 I2 --- SMP SMP number of the nebula
9- 13 I5 K T(OIII) ? OIII temperature
14 A1 --- u_T(OIII) uncertainty flag on T(OIII)
16 A1 --- r_T(OIII) References to T(OIII) (2)
18- 22 I5 K T(NII) ? NII temperature
23 A1 --- u_T(NII) uncertainty flag on T(NII)
26- 31 E6.1 cm-3 Ne Electronic density
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Note (2): References:
1: Aller, L.H., Keyes, C.D., Maran, S.P., Gull, T.R., Michalitsianos, A.G.,
Stecher, T,P. 1987ApJ...320..159A
2: Henry, R.B.C., Liebert, J., Boronson, T.A. 1989ApJ...339..872H
3: Meatheringham, S.J. & Dopita, M.A. 1991ApJS...76.1085M
4: Monk, D.J., Barlow, M.J., Clegg, R.E.S. 1988MNRAS.234..583M
5: Vassiliadis, E., Dopita, M.A., Morgan, D.A., Bell, J.F.
1992ApJS...83...87V
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations (Average+/-Sigma)
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1- 3 A3 --- --- [SMP]
5- 6 I2 --- SMP SMP number of the nebula
11- 15 F5.3 --- He/H He/H abundance (0.109+/-0.018)
25- 28 F4.2 --- Ab(O) O abundance log(O/H) + 12 (8.45 +/-0.20)
38- 41 F4.2 --- Ab(N) N abundance log(N/H) + 12 (7.47 +-/0.44)
51- 54 F4.2 --- Ab(S) S abundance log(S/H) + 12 (6.77 +/-0.31)
65- 68 F4.2 --- Ab(Ar) Ar abundance log(Ar/H)+ 12 (5.95 +/-0.21)
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Table 5: Oxygen abundances in the LMC
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Object Ab(O) Sigma Source
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Type I PNe 8.33 0.13 paper I (1992A&A...257..619D)
Non-type I PNe 8.42 0.25 this work
Non-type I PNe 8.30 0.06 Dopita (1991, Proc. IAU Symp. 148)
Type I PNe 8.41 0.20 Barlow (1991, Proc. IAU Symp. 148)
Non-type I PNe 8.41 0.18 Barlow (1991, Proc. IAU Symp. 148)
HII regions 8.38 Dufour (1984, Proc. IAU Symp. 108)
"Young objects" 8.35 Russell & Dopita (1992ApJ...384..508R)
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(End) Patricia Bauer [CDS] 26-Jul-1993