J/A+A/674/A54 Extended atomic data for oxygen abundance analyses (Li+, 2023)
Extended atomic data for oxygen abundance analyses.
Li W., Jonsson P., Amarsi A.M., Li M.C., Grumer J.
<Astron. Astrophys. 674, A54 (2023)>
=2023A&A...674A..54L 2023A&A...674A..54L (SIMBAD/NED BibCode)
ADC_Keywords: Atomic physics
Keywords: atomic data - Sun: abundances
Abstract:
As the most abundant element in the universe after hydrogen and
helium, oxygen plays a key role in planetary, stellar, and galactic
astrophysics. Its abundance is especially influential on stellar
structure and evolution, and as the dominant opacity contributor at
the base of the Sun's convection zone it is central to the
discussion around the solar modelling problem. However, abundance
analyses require complete and reliable sets of atomic data. We present
extensive atomic data for OI, by using the multi-configuration
Dirac-Hartree-Fock and relativistic configuration interaction
methods. Lifetimes and transition probabilities for radiative electric
dipole transitions are given and compared with results from previous
calculations and available measurements. The accuracy of the computed
transition rates is evaluated by the differences between the
transition rates in Babushkin and Coulomb gauges, as well as by the
cancellation factors. 402 out of 989 computed transitions in this work
are assigned to the accuracy classes AA-B, i.e. with uncertainties
less than 10%, according to the National Institute of Standards and
Technology Atomic Spectra Database. We discuss the influence of the
new log(gf) values on the solar oxygen abundance and ultimately
advocate logεO=8.70±0.04.
Description:
Table A.1 presents the energy levels (in cm-1) and lifetimes (in s;
given in length (l) and velocity (v) gauges) for OI. Energy levels are
given relative to the ground state and compared with NIST-ASD data.
The differences ΔE between EMCDHF and ENIST values are shown
in the fifth column.
Table A.2 presents electric dipole transition data for OI. Upper and
lower states, wavelength, λ, line strength, S, weighted
oscillator strength, log(gf), transition probability, A, together with
the relative difference between two gauges of A values, dT, and
cancellation factor, CF, are shown in the table. Note that the
wavelengths are adjusted to match the level energy values in NIST-ASD.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 102 81 Energy levels and lifetimes for OI
tablea2.dat 202 989 Electric dipole transition data for OI
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Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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2- 3 I2 --- No Sequential number
7- 20 A14 --- State State labelling
27- 28 A2 --- Term Term
31 I1 --- J Total angular momentum quantum number
36 A1 --- Parity Parity
44- 52 F9.2 cm-1 EMCDHF Energy levels from MCDHF/RCI calculations (1)
56- 65 F10.3 cm-1 ENIST Energy levels from NIST-ASD (1)
68- 74 F7.2 cm-1 DeltaE Energy difference = ENIST-EMCDHF
79- 88 E10.4 s taul ? Lifetime in Babushkin (or length) gauge
93-102 E10.4 s tauv ? Lifetime in Coulomb (or velocity) gauge
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Note (1): Energy levels are given relative to the ground state.
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Byte-by-byte Description of file: tablea2.dat
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Bytes Format Units Label Explanations
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3- 22 A20 --- Upper Upper level
27- 28 A2 --- Termu Upper term
32 I1 --- Ju Total angular momentum quantum number
of upper level
34 A1 --- Pu Parity of upper level
40- 59 A20 --- Lower Lower level
64- 65 A2 --- Terml Lower term
69 I1 --- Jl Total angular momentum quantum number
of lower level
71 A1 --- Pl Parity of upper level
79- 89 F11.4 nm lambda Transition wavelength (1)
94-102 E9.3 --- SB Line strength in Babushkin gauge
(in atomic unit)
106-114 E9.3 --- SC Line strength in Coulomb gauge (in atomic unit)
120-126 F7.3 --- loggf-B Weighted oscillator strength in Babushkin gauge
131-137 F7.3 --- loggf-C Weighted oscillator strength in Coulomb gauge
142-150 E9.3 s-1 A-B Transition probability in Babushkin gauge
155-163 E9.3 s-1 A-C Transition probability in Coulomb gauge
167-172 F6.4 --- dT Gauge difference
177-185 E9.3 --- CF-B Cancellation factor in Babushkin gauge
190-198 E9.3 --- CF-C Canlellation in Coulomb gauge
202 A1 --- Acc Accuracy class
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Note (1): The wavelengths are adjusted to match the level energy values
in NIST-ASD.
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Acknowledgements:
Wenxian Li, wxli(at)nao.cas.cn
(End) Wenxian Li [NAOC/CAS], Patricia Vannier [CDS] 03-Apr-2023