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Detailed Description of J/A+AS/137/157
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Individual files can be fetched (via http) from
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This standardized document follows the rules of the Standard Description for Astronomical Catalogues. For those having to work on this catalogue using FORTRAN programs, this ReadMe file can be transformed into a f77-compliant program which reads the files making up this catalogue, in two versions: either a f77 program loading whole files into arrays, or a f77-program reading each data file line by line.
J/A+AS/137/157 O III recombination coefficients (Kisielius+, 1999)
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Recombination coefficients for the 5g-4f transitions of O III
at nebular temperatures and densities
Kisielius R., Storey P.J.
<Astron. Astrophys. Suppl. Ser. 137, 157 (1999)>
=1999A&AS..137..157K (SIMBAD/NED BibCode)
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ADC_Keywords: Atomic physics ; Planetary nebulae
Keywords: atomic data - line: formation - ISM: H II regions -
ISM: planetary nebulae: general
Abstract:
We calculate effective recombination coefficients for the formation of
the 5g-4f lines of O III in the intermediate coupling scheme.
Photoionization data for the 5g levels calculated using the R-matrix
method are used to derive their recombination coefficients. Cascading
from higher states is included, allowing for the effects of finite
electron density in a hydrogenic approximation. We explicitly include
the distribution of population between the two ground levels of O3+
in the calculation of the line intensities. The results are presented
as a simple programmable formula allowing the calculation of
recombination line intensities for electron temperatures, Te in the
range 5000-20000K and electron densities, Ne in the range
102-106cm-3.
File Summary:
FileName Lrecl Records Explanations
× ReadMe 80 . This file
× table1.dat 64 24 Indices n1 and energy levels of the 4f and 5g
states in O2+ ions
× table2.dat 41 83 Wavelengths in air, electric dipole transition
probabilities A(n1,n2) and branching ratios
b(n1,n2) for the 5g-4f transitions in O2+
ions
× table3.dat 67 12 Fitting coefficients for the direct
recombination coefficients adir to the
5g levels of O2+
× table4.dat 20 12 Fractions of the cascade contributions from
each series to the recombination coefficients
of the 5g levels of O2+
× table5.dat 47 12 Calculated and fitted effective recombination
coefficients for the 5g levels of O2+ at the
electron temperatures T=10000K and T=20000K
and the electron density N=103cm-3.
See also:
J/A+AS/133/257 : Recombination coefficients for NeII lines (Kisielius+ 1998)
J/A+AS/135/359 : HI and HeII fine structure components (Clegg+ 1999)
J/A+AS/142/85 : Recombination coefficients for C II lines (Davey+, 2000)
J/A+A/387/1135 : NII effective recombination coefficients (Kisielius+, 2002)
Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 2 I2 --- n1 Level index
5- 6 A2 --- Term Term of parent level
8- 10 A3 --- J0 J of parent level
13- 14 A2 --- nl outer electron in spectroscopic notation
17 I1 --- S 2S+1 of level
19 A1 --- L L of level
21 I1 --- J J of level
25- 32 A8 --- LK Experimental level assignment
34 I1 --- Jb J of level
35- 44 F10.1 cm-1 Exp Experimental level energy (1)
45- 54 F10.1 cm-1 SS Theoretical level energy from SUPERSTRUCTURE
calculation
55- 64 F10.1 cm-1 RM Theoretical level energy from R-matrix
calculation
Note (1): Experimental energy data are from Pettersson (Pettersson, Physica
Scripta, 1982, 26, 296) while theoretical values are from
SUPERSTRUCTURE (SS) and an R-matrix (RM) calculation. We also give
our theoretical (SS) and previous experimental (Moore, 1970,
"Atomic Energy Levels", NBS) level assignments.
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 3 I3 --- n1 Index of upper level (1)
5- 7 I3 --- n2 Index of lower level (1)
10- 18 F9.3 0.1nm Lambda Wavelengths (air)
21- 29 E9.2 s-1 A(n1,n2) Dipole transition probability between upper
and lower levels
32- 41 E10.3 --- b(n1,n2) Transition branching ratio
Note (1): The indices n1 and n2 correspond to the energy level indices
in table 1.
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 2 I2 --- n1 Index of upper level
4- 11 F8.4 --- a1 Fitting coefficient a1
12- 19 F8.4 --- b1 Fitting coefficient b1
20- 27 F8.4 --- c1 Fitting coefficient c1
28- 35 F8.4 --- d1 Fitting coefficient d1
36- 43 F8.4 --- a2 Fitting coefficient a2
44- 51 F8.4 --- b2 Fitting coefficient b2
52- 59 F8.4 --- c2 Fitting coefficient c2
60- 67 F8.4 --- d2 Fitting coefficient d2
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 2 I2 --- n1 Index of upper level (1)
3- 11 F9.5 --- g1c Fraction of cascade contribution from the
first series
12- 20 F9.5 --- g2c Fraction of cascade contribution from the
second series
Note (1): Indices n1 correspond to the energy level indices from table 1.
Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
2- 3 I2 --- n1 Index of upper level (1)
6- 14 E9.3 10-12cm3/s acal1 T=10000K calculated recombination coefficient
17- 25 E9.3 10-12cm3/s afit1 T=10000K fitted recombination coefficient
28- 36 E9.3 10-12cm3/s acal2 T=20000K calculated recombination coefficient
39- 47 E9.3 10-12cm3/s afit2 T=20000K fitted recombination coefficient
Note (1): Indices n1 correspond to the energy level indices from table 1.
Acknowledgements: Romas Kisielius
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(End) Patricia Bauer [CDS] 27-Apr-1999
