J/MNRAS/428/3443 PNe and HII regions plasma diagnostics (McNabb+, 2013)
Plasma diagnostics for planetary nebulae and HII regions using the NII and
OII optical recombination lines.
McNabb I.A., Fang X., Liu X.-W., Bastin R.J., Storey P.J.
<Mon. Not. R. Astron. Soc., 428, 3443-3461 (2013)>
=2013MNRAS.428.3443M 2013MNRAS.428.3443M
ADC_Keywords: Planetary nebulae ; H II regions ; Spectroscopy
Keywords: atomic data - HII regions - planetary nebulae: general
Abstract:
We carry out plasma diagnostic analyses for 123 planetary nebulae
(PNe) and 42 HII regions using the NII and OII optical recombination
lines (ORLs). New effective recombination coefficients for the NII and
OII optical recombination spectra are used. These data were calculated
under the intermediate coupling scheme for a number of electron
temperature (Te) and density (Ne) cases. We use a new method to
determine the Te's and Ne's for the nebular sample, combining the ORLs
with the most reliable measurements for each ion and the predicted
intensities that are based on the new atomic data. Uncertainties of
the derived Te and Ne are estimated for each object.
The diagnostic results from heavy element ORLs show reasonable
agreement with previous calculations in the literature. We compare the
electron temperatures derived from the NII and OII ORLs, Te(ORLs), and
those from the collisionally excited lines (CELs), Te(CELs), as well
as the hydrogen Balmer jump, Te(HIBJ), especially for the PNe with
large abundance discrepancies. Temperatures from the HeI recombination
lines, Te(HeI), are also used for comparison if available. For all the
objects included in our sample, Te(ORLs) are lower than Te(HIBJ),
which are in turn systematically lower than Te(CELs). PNe with Te(HeI)
available show the relation Te(ORLs)≤Te(HeI)≤Te(HIBJ)≤Te(CELs),
which is consistent with predictions from the bi-abundance nebular
model postulated by Liu et al. (2000MNRAS.312..585L 2000MNRAS.312..585L).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 114 123 Electron temperatures and densities for PNe
table2.dat 114 42 Electron temperatures and densities for HII regions
table3.dat 55 103 The HeI diagnostics from the literature and
current analysis for PNe
table4.dat 52 29 Electron temperatures of HII regions derived
from the HeI recombination lines
refs.dat 73 44 References
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Byte-by-byte Description of file: table[12].dat
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Bytes Format Units Label Explanations
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1- 19 A19 --- Object Object designation
21- 22 I2 --- r_Object Reference for Object, in refs.dat file
24- 29 F6.2 --- ADF ? O2+ abundance discrepancy factor (G1)
31- 34 F4.2 [K] Te[O3] ? Literature [OIII] log(electron temperature)
36- 37 I2 --- r_Te[O3] ? Reference for logTe[OIII], in refs.dat file
39- 42 F4.2 [K] Te(Bj) ? Literature hydrogen Balmer jump
log(electron temperature)
44- 45 I2 --- r_Te(Bj) ? Reference for logTe(BJ), in refs.dat file
47- 50 F4.2 [K] Te[N2] ? Current work NII log(electron temperature)
52- 55 F4.2 [K] E_Te[N2] ? Error on logTe[NII] (upper value)
57- 60 F4.2 [K] e_Te[N2] ? Error on logTe[NII] (lower value)
65- 68 F4.2 [cm-3] Ne[N2] ? Current work NII log(electron density)
70- 73 F4.2 [cm-3] E_Ne[N2] ? Error on logN[NII] (upper value)
75- 78 F4.2 [cm-3] e_Ne[N2] ? Error on logN[NII] (lower value)
83- 86 F4.2 [K] Te[O2] ? Current work OII log(electron temperature)
88- 91 F4.2 [K] E_Te[O2] ? Error on logTe[OII] (upper value)
93- 96 F4.2 [K] e_Te[O2] ? Error on logTe[OII] (lower value)
101-104 F4.2 [cm-3] Ne[O2] ? Current work OII log(electron density)
106-109 F4.2 [cm-3] E_Ne[O2] ? Error on logN[OII] (upper value)
111-114 F4.2 [cm-3] e_Ne[O2] ? Error on logN[OII] (lower value)
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Byte-by-byte Description of file: table[34].dat
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Bytes Format Units Label Explanations
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1- 19 A19 --- Object Object designation
21- 22 I2 --- r_Object Reference for Object, in refs.dat file
24- 28 F5.1 --- ADF ? O2+ abundance discrepancy factor (G1)
30- 34 I5 [K] Te(He)1 ? HeIλ7281/6678) log(electron temperature)
36- 37 I2 --- r_Te(He)1 ? Reference for logTe(He)1, in refs.dat file
39- 43 I5 [K] Te(He)2 ? HeIλ7281/6678) log(electron temperature)
45- 46 I2 --- r_Te(He)2 ? Reference for logTe(He)2, in refs.dat file
48- 52 I5 [K] Te(He)3 ? HeIλ7281/6678) log(electron temperature)
54- 55 I2 --- r_Te(He)3 ? Reference for logTe(He)3, in refs.dat file
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Ref Reference code
4- 22 A19 --- BibCode BibCode
24- 52 A29 --- Aut Author's name
54- 73 A20 --- Com Comment
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Global Notes:
Note (G1): the abundance discrepancy factor ADF(O2+) is the ratio of the
abundances derived from the optical recombination lines (ORLs) and
the collisionally excited lines (CELs) methods.
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 07-Mar-2014