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J/A+AS/133/257 Recombination coefficients for NeII lines (Kisielius+ 1998)
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Recombination coefficients for Ne II lines at nebular temperatures and densities
Kisielius R., Storey P.J., Davey A.R., Neale L.T.
<Astron. Astrophys. Suppl. Ser. 133, 257 (1998)>
=1998A&AS..133..257K (SIMBAD/NED BibCode)
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ADC_Keywords: Atomic physics
Keywords: atomic data - H II regions - planetary nebulae: general
Abstract:
We calculate total recombination coefficients for Ne^2+^ + e^-^ and
effective recombination coefficients for the formation of selected
lines of Ne II. New photoionization data are calculated which
accurately map the near threshold resonances and are used to derive
recombination coefficients for principal quantum numbers, n<=15,
including radiative and dielectronic recombination. Cascading from
higher states is included, allowing for the effects of finite electron
density in a hydrogenic approximation. The effects of population in
the excited states of the recombining ion are investigated.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 39 6 Comparison of calculated and experimental energies
for the Ne^2+^ target states.
table2.dat 34 18 Total recombination coefficients
table3.dat 106 215 Effective recombination coefficients at
electron density N_e_=10^4^cm^-3^.
table4.dat 106 239 Effective recombination coefficients at electron
density N_e_=10^6^cm^-3^.
table5.dat 82 215 Fitting coefficients and maximum fitting errors(%)
for effective recombination coefficients. Electron
density N_e_=10^4^cm^-3^.
table6.dat 51 38 The factors b(J_i_,J_f_) and wavelengths(in air) for
the strongest multiplets of Ne II.
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See also:
VI/64 : Recombination line intensities for hydrogenic ions (Storey+ 1995)
J/A+AS/135/359 : HI and HeII fine structure components (Clegg+ 1999)
J/A+AS/137/157 : O III recombination coefficients (Kisielius+, 1999)
J/A+AS/142/85 : Recombination coefficients for C II lines (Davey+, 2000)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 15 A15 --- Config Electronic configuration
17- 18 A2 --- Term State term
21- 27 F7.5 Ry Epresent Present calculation energy of term
31- 37 F7.5 Ry Eexperimental Experimental energy of term
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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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2- 6 I5 K T Electron temperature
10 A1 --- Case [AB] Plasma state case (1)
13- 16 F4.2 10-12cm3/s RC2 Recombination coefficients at N_e_=10^2^cm^-3^
19- 22 F4.2 10-12cm3/s RC4 Recombination coefficients at N_e_=10^4^cm^-3^
25- 28 F4.2 10-12cm3/s RC5 Recombination coefficients at N_e_=10^5^cm^-3^
31- 34 F4.2 10-12cm3/s RC6 Recombination coefficients at N_e_=10^6^cm^-3^
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Note (1): In Case A, all emission lines are assumed to be optically thin.
In Case B, lines terminating on the ^2^P^o^ term are assumed to be
thick and no radiative decays to this state arte permitted when
calculating the population structure. See Baker & Menzel,
(1938ApJ....88...52B) for more details.
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Byte-by-byte Description of file: table3.dat, table4.dat
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Bytes Format Units Label Explanations
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2 I1 --- SP1 2S+1 of upper state parent term
3 I1 --- LP1 L of upper state parent term
4 I1 --- PP1 [0,1] Parity of upper state parent term (1)
6 I1 --- n1 Principal quantum number of outer electron
7 A1 --- l1 Orbital quantum number of outer electron
9 I1 --- S1 2S+1 of upper state term
10 I1 --- L1 L of upper state term
11 I1 --- P1 [0,1] Parity of upper state term (1)
14 I1 --- SP2 2S+1 of lower state parent term
15 I1 --- LP2 L of lower state parent term
16 I1 --- PP2 [0,1] Parity of lower state parent term (1)
18 I1 --- n2 Principal quantum number of outer electron
19 A1 --- l2 Orbital quantum number of outer electron
21 I1 --- S2 2S+1 of lower state term
22 I1 --- L2 L of lower state term
23 I1 --- P2 [0,1] Parity of lower state term (1)
26 A1 --- Case [AB] Plasma state case (2)
29- 34 F6.1 nm lambda Transition wavelength in nm
36- 42 F7.3 10-14cm3/s ECR1 Te= 1000K effective recombination coefficient
44- 50 F7.3 10-14cm3/s ECR2 Te= 2000K effective recombination coefficient
53- 58 F6.3 10-14cm3/s ECR3 Te= 3000K effective recombination coefficient
61- 66 F6.3 10-14cm3/s ECR5 Te= 5000K effective recombination coefficient
69- 74 F6.3 10-14cm3/s ECR75 Te=75000K effective recombination coefficient
77- 82 F6.3 10-14cm3/s ECR100 Te=10000K effective recombination coefficient
85- 90 F6.3 10-14cm3/s ECR125 Te=12500K effective recombination coefficient
93- 98 F6.3 10-14cm3/s ECR150 Te=15000K effective recombination coefficient
101-106 F6.3 10-14cm3/s ECR200 Te=20000K effective recombination coefficient
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Note (1): 0 for even, 1 for odd
Note (2): In Case A, all emission lines are assumed to be optically thin.
In Case B, lines terminating on the ^2^P^o^ term are assumed to be
thick and no radiative decays to this state arte permitted when
calculating the population structure. See Baker & Menzel,
(1938ApJ....88...52B) for more details.
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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2 I1 --- SP1 2S+1 of upper state parent term
3 I1 --- LP1 L of upper state parent term
4 I1 --- PP1 [0,1] Parity of upper state parent term (1)
6 I1 --- n1 Principal quantum number of outer electron
7 A1 --- l1 Orbital quantum number of outer electron
9 I1 --- S1 2S+1 of upper state term
10 I1 --- L1 L of upper state term
11 I1 --- P1 [0,1] Parity of upper state term (1)
14 I1 --- SP2 2S+1 of lower state parent term
15 I1 --- LP2 L of lower state parent term
16 I1 --- PP2 [0,1] Parity of lower state parent term (1)
18 I1 --- n2 Principal quantum number of outer electron
19 A1 --- l2 Orbital quantum number of outer electron
21 I1 --- S2 2S+1 of lower state term
22 I1 --- L2 L of lower state term
23 I1 --- P2 [0,1] Parity of lower state term (1)
26 A1 --- Case [AB] Plasma state case (2)
29- 34 F6.1 nm Lambda Transition wavelength in nm
37- 42 F6.3 10-14cm3/s a Fitting coefficient a (3)
45- 50 F6.3 10-14cm3/s b Fitting coefficient b (3)
53- 58 F6.3 10-14cm3/s c Fitting coefficient c (3)
61- 66 F6.3 10-14cm3/s d Fitting coefficient d (3)
69- 75 F7.4 10-14cm3/s f Fitting coefficient f (3)
78- 81 F4.2 % FitErr Maximum fitting error (in percent)
82 A1 --- Note [*] Asterisks denote line for which fitting
is valid from T_e_=2000K.
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Note (1): 0 for even, 1 for odd
Note (2): In Case A, all emission lines are assumed to be optically thin.
In Case B, lines terminating on the ^2^P^o^ term are assumed to be
thick and no radiative decays to this state arte permitted when
calculating the population structure. See Baker & Menzel,
(1938ApJ....88...52B) for more details.
Note (3): Fit parameters and maximum deviations from the calculated data are
given for the effective recombination coefficients at
N_e_=10^4^cm^-3^. The coefficients are fitted by a least-squares
algorithm to the functional form:
{alpha}_eff_=10^-14^*at^f^(1+b(1-t)+c(1-t)^2^+d(1-t)^3^),
where t=T_e_[K]/10^4^, and a, b, c, d and f are constants.
Fitting is valid for the whole temperature range studied for all
lines except those denoted by asterisk in the last column.
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 19 A19 --- Trans Transition multiplet
21 I1 --- Si 2S+1 of upper term
22 I1 --- Li L of upper term
23 A1 --- --- [_]
24- 26 F3.1 --- Ji J of upper term
28 I1 --- Sf 2S+1 of lower term
29 I1 --- Lf L of lower term
30 A1 --- --- [_]
31- 33 F3.1 --- Jf J of lower term
36- 43 F8.4 nm Lambda Wavelength of transition line
46- 50 F5.3 --- b(Ji,Jf) Splitting factor b(Ji,Jf) defined by Eq.(10).
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Acknowledgements: Dr. Romas Kisielius <rk@aura.phys.ucl.ac.uk>
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(End) Patricia Bauer [CDS] 02-Jul-1998