J/A+A/530/A18 Nebular NII lines effective recombination coeff. (Fang+, 2013)
New effective recombination coefficients for nebular NII lines (Corrigedum).
Fang X., Storey P.J., Liu X.-W.
<Astron. Astrophys. 530, A18 (2011) and 550, C2 (2013)>
=2011A&A...530A..18F 2011A&A...530A..18F
+2013A&A...550C...2F 2013A&A...550C...2F
ADC_Keywords: Atomic physics
Keywords: atomic data - line: formation - HII regions - ISM: atoms -
planetary nebulae: general
Abstract:
In nebular astrophysics, there has been a long-standing dichotomy in
plasma diagnostics between abundance determinations using the
traditional method based on collisionally excited lines (CELs), on the
one, hand and (optical) recombination lines/continuum, on the other. A
number of mechanisms have been proposed to explain the dichotomy. Deep
spectroscopy and recombination line analysis of emission line nebulae
(planetary nebulae and HII regions) in the past decade have pointed to
the existence of another previously unknown component of cold,
H-deficient material as the culprit. Better constraints are needed on
the physical conditions (electron temperature and density), chemical
composition, mass, and spatial distribution of the postulated
H-deficient inclusions in order to unravel their astrophysical
origins. This requires knowledge of the relevant atomic parameters,
most importantly the effective recombination coefficients of abundant
heavy element ions such as CII, OII, NII, and NeII, appropriate for
the physical conditions prevailing in those cold inclusions (e.g.
Te≤1000K ).
Description:
Here we present a corrigendum published in A&A, 550, C2.
Tables 3-15 are all corrected based on the revised atomic data.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 122 217 Case B effective recombination coefficients
for electron density Ne=102cm-3
table4.dat 122 217 Case B effective recombination coefficients
for electron density Ne=103cm-3
table5.dat 122 217 Case B effective recombination coefficients
for electron density Ne=104cm-3
table6.dat 122 217 Case B effective recombination coefficients
for electron density Ne=105cm-3
table7.dat 129 55 Fit parameters and the average and maximum
fitting errors for 125≤Te≤20000K and
Ne=102cm-3 for Case B recombination
table8.dat 129 55 Fit parameters and the average and maximum
fitting errors for 125≤Te≤20000K and
Ne=103cm-3 for Case B recombination
table9.dat 129 55 Fit parameters and the average and maximum
fitting errors for 125≤Te≤20000K and
Ne=104cm-3 for Case B recombination
table10.dat 129 55 Fit parameters and the average and maximum
fitting errors for 125≤Te≤20000K and
Ne=105cm-3 for Case B recombination
table11.dat 129 55 Fit parameters and the average and maximum
fitting errors for 125≤Te≤20000K and
Ne=102cm-3 for Case A recombination
table12.dat 129 55 Fit parameters and the average and maximum
fitting errors for 125≤Te≤20000K and
Ne=103cm-3 for Case A recombination
table13.dat 129 55 Fit parameters and the average and maximum
fitting errors for 125≤Te≤20000K and
Ne=104cm-3 for Case A recombination
table14.dat 129 55 Fit parameters and the average and maximum
fitting errors for 125≤Te≤20000K and
Ne=105cm-3 for Case A recombination
table15.dat 70 26 *Comparison of our direct recombination
coefficients to states of N+ with those of
Kisielius & Storey (2002, Cat. J/A+A/387/1135)
and of Nahar (1995ApJS..101..423N 1995ApJS..101..423N)
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Note on table15.dat: The comparison is for electron temperatures Te=1000
and 10000K, and electron density Ne=104cm-3.
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See also:
J/A+A/387/1135 : NII effective recombination coefficients (Kisielius+, 2002)
Byte-by-byte Description of file: table3.dat table4.dat table5.dat table6.dat
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Bytes Format Units Label Explanations
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1- 21 A21 --- Tr General transition term (multiplet)
24- 54 A31 --- Trans Detailed transition
57- 64 F8.2 Angstrom lambda Transition wavelength λ
66 A1 --- n_lambda [*] experimentally known energies (1)
68- 74 E7.2 10-15cm3/s ERC1 Effective recombination coefficient
αeff(λ) for Te=125K (2)
76- 82 E7.2 10-15cm3/s ERC2 Effective recombination coefficient
αeff(λ) for Te=500K (2)
84- 90 E7.2 10-15cm3/s ERC3 Effective recombination coefficient
αeff(λ) for Te=1000K (2)
92- 98 E7.2 10-15cm3/s ERC4 Effective recombination coefficient
αeff(λ) for Te=5000K (2)
100-106 E7.2 10-15cm3/s ERC5 Effective recombination coefficient
αeff(λ) for Te=10000K (2)
108-114 E7.2 10-15cm3/s ERC6 Effective recombination coefficient
αeff(λ) for Te=15000K (2)
116-122 E7.2 10-15cm3/s ERC7 Effective recombination coefficient
αeff(λ) for Te=20000K (2)
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Note (1): * denotes this transition wavelength was derived from the
experimentally known energies of the upper and lower states.
Note (2): the Case B effective recombination coefficient
αeff(λ) is defined by emissivity e(λ):
e(λ) = N_e N_+ αeff(λ) hc/λ
[e(λ) in erg/s/cm-3 = 100W/m3]
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Byte-by-byte Description of file: table[7-9].dat table1[0-4].dat
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Bytes Format Units Label Explanations
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1- 27 A27 --- Trans Transition
30- 32 A3 --- Mult Multiplet
35- 41 F7.2 Angstrom lambda Wavelength of transition λ
43- 50 F8.4 --- a a coefficient (1)
52- 59 F8.4 --- b b coefficient (1)
61- 68 F8.4 --- c c coefficient (1)
70- 77 F8.4 --- d d coefficient (1)
79- 86 F8.4 --- e e coefficient (1)
88- 95 F8.4 --- f f coefficient (1)
97-104 F8.4 --- g g coefficient (1)
107-115 F9.6 --- h h coefficient (1)
118-122 F5.3 % del Average deviation of the fit (delta)
125-129 F5.3 % Del Maximum deviation of the fit Δ
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Note (1): The expression of the effective recombination coefficient is
log(αeff)+15 = a+b*t+c*t2+(d+e*t+f*t2)log(t)+g*(log(t))2+h/t,
where t is the reduced electronic temperature Te/104K.
table7.dat, table8.dat, table9.dat and table10.dat are fit results for
Case B recombination;
table11.dat, table12.dat, table13.dat and table14.dat are fit results for
Case A recombination.
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Byte-by-byte Description of file: table15.dat
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Bytes Format Units Label Explanations
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1- 15 A15 --- State State (1)
18- 25 E8.2 cm+3/s DRCN3 ?=- Nahar (1995ApJS..101..423N 1995ApJS..101..423N) direct
recombination coefficient for Te=1000K
27- 34 E8.2 cm+3/s DRCK3 ?=- Kisielius & Storey (J/A+A/387/1135) direct
recombination coefficient for Te=1000K
36- 43 E8.2 cm+3/s DRCP3 Present work direct recombination coefficient
for Te=1000K
45- 52 E8.2 cm+3/s DRCN4 ?=- Nahar (1995ApJS..101..423N 1995ApJS..101..423N) direct
recombination coefficient for Te=10000K
54- 61 E8.2 cm+3/s DRCK4 ?=- Kisielius & Storey (J/A+A/387/1135) direct
recombination coefficient for Te=10000K
63- 70 E8.2 cm+3/s DRCP4 Present work direct recombination coefficient
for Te=10000K
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Note (1): Two last lines are for Sum and Total
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Acknowledgements:
Xuan Fan, fangx(at)pku.edu.cn
History:
* 29-Apr-2011: Original version
* 01-Feb-2013: New files from erratum (from author)
(End) Patricia Vannier [CDS] 01-Feb-2013