J/ApJS/157/371 Recombination lines in planetary nebulae (Robertson-Tessi+, 2005)
Recombination line versus forbidden line abundances in planetary nebulae.
Robertson-tessi M., Garnett D.R.
<Astrophys. J. Suppl. Ser., 157, 371-395 (2005)>
=2005ApJS..157..371R 2005ApJS..157..371R
ADC_Keywords: Planetary nebulae ; Abundances
Keywords: ISM: abundances - planetary nebulae: general
Abstract:
Recombination lines (RLs) of C II, N II, and O II in planetary nebulae
(PNs) have been found to give abundances that are much larger in some
cases than abundances from collisionally excited forbidden lines
(CELs). The origins of this abundance discrepancy are highly debated.
We present new spectroscopic observations of O II and C II
recombination lines for six planetary nebulae.
Description:
The spectra were all obtained with the 2.3m Bok reflector plus B&C
spectrograph of Steward Observatory on the nights of 1999 June 7-8.
Objects:
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RA (2000) DE Designation(s)
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16 11 44.5 +12 04 17 IC 4593 = AG+12 1684
16 44 29.5 +23 48 00 NGC 6210 = PN G043.1+37.7
17 58 33.4 +66 38 00 NGC 6543 = NAME SNAIL NEBULA
18 12 06.4 +06 51 13 NGC 6572 = PN G034.6+11.8
19 22 57.0 +01 30 46 NGC 6790 = PN G037.8-06.3
21 07 01.6 +42 14 10 NGC 7027 = PN G084.9-03.4
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 58 818 Observed fluxes relative to HΒ=100.0
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See also:
V/84 : Strasbourg-ESO Catalogue of Galactic Planetary Nebulae (Acker+, 1992)
J/A+A/405/627 : Angular dimensions of 312 planetary nebulae (Tylenda+, 2003)
J/ApJS/139/199 : Catalog of distances of planetary nebulae (Phillips, 2002)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name Source name
9- 10 A2 --- n_Name [S] S for second observation
12- 18 F7.2 0.1nm LambdaObs Observed wavelength
20- 26 F7.2 0.1nm LambdaLab Laboratory wavelength
28- 35 A8 --- Ion Ion identification
37- 40 A4 --- Multi Multiplet identification
42- 48 F7.3 --- FluxObs Observed flux (1)
50- 56 F7.3 --- CFlux Reddening corrected flux (1)
58 A1 --- ECode Error code (2)
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Note (1): Normalized to I(Hβ)=100.
Note (2): Error code, defined as follows:
A = less than 5%;
B = 5-10%;
C = 10-20%;
D = 20-30%;
E = 30-50%;
F = a 2σ limit.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 13-Sep-2005