J/A+A/606/A127 FeI photoionization cross sections and ECS (Bautista+, 2017)
Photoionization and electron impact excitation cross sections for FeI.
Bautista M.A., Lind K., Bergemann M.
<Astron. Astrophys. 606, A127 (2017)>
=2017A&A...606A.127B 2017A&A...606A.127B (SIMBAD/NED BibCode)
ADC_Keywords: Atomic physics
Keywords: atomic data - atomic processes - radiative transfer -
Sun: atmosphere - stars: atmospheres
Abstract:
Iron is a major contributor to the opacity in the atmospheres of
late-type stars, as well as a major contributor to the observed lines
in their visible spectrum. Iron lines are commonly used to derive
basic stellar parameters from medium/high resolution spectroscopy,
that is, spectroscopy which shows metal content, effective
temperature, and surface gravity.
Here we present large R-matrix calculations for photoionization cross
sections and electron impact collision strengths.
Description:
Two electronic files are provided with this publication. These are:
xsection.txt. This table lists the total photoionization cross
sections for all states of FeI found in the calculation.
table5.dat. This table contains the Maxwellian averaged effective
collision strengths for FeI. The effective collision strengths are
listed for five temperatures between 3000 and 20,000K
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 48 46 LS terms of iron included in the electron
impact collision strengths calculation
table5.dat 67 1035 Effective collision strengths for FeI for
6 different temperatures
xsections.txt 74 1628801 Total photoionization cross section for FeI
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Description of file: xsections.txt
Total photoionization cross section for FeI
First line:
2 I1 --- 2S+1 State's multiplicity (2S+1)
4 I1 --- L State's orbital angular momentum (L)
6 I1 --- P State's parity
8- 9 I2 --- CF configuration number (in the order listed in Table 1)
Second line:
5- 14 E12.6 Ry E0 State's energy relative to the ground state of Fe^+
18- 21 I4 --- N number of energies in the cross section
Subsequent lines:
1- 14 E14.9 Ryd Eph Photon energy
17- 25 E9.5 --- CS Photoionization cross section (Mb)
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- CF Sequential number
4- 24 A21 --- Conf Configuration
28- 36 A9 --- Term Term
39- 48 F10.8 Ry E Energy
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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- 3 I2 --- i0 Index of lower level in the transition
6- 7 I2 --- i1 Index of upper level in the transition
9- 17 E9.4 --- ECS3 Effective collision strength at T=3000K
19- 27 E9.4 --- ECS5 Effective collision strength at T=5000K
29- 37 E9.4 --- ECS8 Effective collision strength at T=8000K
39- 47 E9.4 --- ECS10 Effective collision strength at T=10000K
49- 57 E9.4 --- ECS15 Effective collision strength at T=15000K
59- 67 E9.4 --- ECS20 Effective collision strength at T=20000K
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Acknowledgements:
Manuel Bautista, manuel.bautista(at)wmich.edu
(End) Patricia Vannier [CDS] 19-Sep-2017