- ID:
- ivo://CDS.VizieR/J/A+A/543/A44
- Title:
- Atomic data for iron peak and light odd-Z ions
- Short Name:
- J/A+A/543/A44
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Complete data sets of level energies, transition wavelengths, A-values, radiative and Auger widths and fluorescence yields for K-vacancy levels of the F, Na, P, Cl, K, Sc, Ti, V, Cr, Mn, Co, Cu and Zn isonuclear sequences have been computed by a Hartree-Fock method that includes relativistic corrections as implemented in Cowan's atomic structure computer suite. The atomic parameters for more than 3 million fine- structure K lines have been determined. Ions with electron number N>9 are treated for the first time, and detailed comparisons with available measurements and theoretical data for ions with N=<9 are carried out in order to estimate reliable accuracy ratings.
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Search Results
- ID:
- ivo://CDS.VizieR/J/A+A/533/A62
- Title:
- Atomic Data for Neutron-Capture Elements. II
- Short Name:
- J/A+A/533/A62
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present multi-configuration Breit-Pauli distorted-wave photoionization (PI) cross sections and radiative recombination (RR) and dielectronic recombination (DR) rate coefficients for the first six krypton ions. These were calculated with the AUTOSTRUCTURE code, using semi-relativistic radial wavefunctions in intermediate coupling.
- ID:
- ivo://CDS.VizieR/J/A+AS/105/77
- Title:
- Atomic data for O VIII and Fe XVII
- Short Name:
- J/A+AS/105/77
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The atomic data required to analyse low density coronal plasmas have been calculated and used to interpret X-ray spectra observed by the Flat Crystal Spectrometer of the SMM/NASA satellite in the 14-19 A wavelength range. The emission lines correspond mainly to Fe XVI, Fe XVII, Fe XVIII and some ones to O VII, O VIII.
- ID:
- ivo://CDS.VizieR/J/A+A/645/A106
- Title:
- Atomic data for the Gaia-ESO Survey
- Short Name:
- J/A+A/645/A106
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We describe the atomic data that were used for the abundance analyses of FGK-type stars carried out within the Gaia-ESO Public Spectroscopic Survey in the years 2012 to 2019. The Gaia-ESO survey is one among several current and future stellar spectroscopic surveys producing abundances for Milky-Way stars on an industrial scale. We present an unprecedented effort to create a homogeneous common line list, which was used by several abundance analysis groups using different radiative transfer codes to calculate synthetic spectra and equivalent widths. The atomic data are accompanied by quality indicators and detailed references to the sources. An overview of molecular data is also given. Among a subset of over 1300 lines of 35 elements in the wavelength ranges from 475nm to 685nm and from 850nm to 895nm we identified about 200 lines of 24 species which have accurate gf-values and are free of blends in the spectra of the Sun and Arcturus.
- ID:
- ivo://CDS.VizieR/J/A+A/624/A60
- Title:
- Atomic data for unblended lines in FGK stars
- Short Name:
- J/A+A/624/A60
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Fundamental atomic transition parameters, such as oscillator strengths and rest wavelengths, play a key role in modelling and understanding the chemical composition of stars in the universe. Despite the significant work under way to produce these parameters for many astrophysically important ions, uncertainties in these parameters remain large and can limit the accuracy of chemical abundance determinations. The Belgian repository of fundamental atomic data and stellar spectra (BRASS) aims to provide a large systematic and homogeneous quality assessment of the atomic data available for quantitative spectroscopy. BRASS shall compare synthetic spectra against extremely high-quality observed spectra, at a resolution of ~85000 and signal-noise ratios of ~1000, for approximately 20 bright BAFGK spectral-type stars, in order to critically evaluate the atomic data available for over a thousand potentially useful spectral lines. A large-scale homogeneous selection of atomic lines is performed by synthesising theoretical spectra of literature atomic lines for FGK-type stars including the Sun, resulting in a selection of 1091 theoretically deep and unblended lines in the wavelength range 4200-6800{AA}, which may be suitable for quality assessment. Astrophysical log(gf) values are determined for the 1091 transitions using two commonly employed methods. The agreement of these log(gf) values are used to select well-behaved lines for quality assessment. We found 845 atomic lines to be suitable for quality assessment, of which 408 were found to be robust against systematic differences between analysis methods. Around 53% of the quality-assessed lines were found to have at least one literature log(gf) value in agreement with our derived values, though the remaining values can disagree by as much as 0.5dex. Only ~38% of FeI lines were found to have sufficiently accurate log(gf) values, increasing to ~70-75% for the remaining Fe-group lines.
- ID:
- ivo://CDS.VizieR/J/A+A/537/A22
- Title:
- Atomic data for X-ray lines of FeVIII and FeIX
- Short Name:
- J/A+A/537/A22
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The distorted wave extension of the autostructure code has been used to calculate energy levels, radiative transition probabilities and collisional excitation rates of Fe VIII and Fe IX up to n=6 for Fe IX and n=7 for Fe VIII. We have compared some of the data with previous calculations, finding overall agreement for radiative transition rates, but interesting differences for some collisional data. ************************************************************************** * * * Sorry, but the author(s) never supplied the tabular material * * announced in the paper * * * **************************************************************************
- ID:
- ivo://CDS.VizieR/J/A+A/430/331
- Title:
- Atomic data from the IRON Project. LVI.
- Short Name:
- J/A+A/430/331
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Collision strengths for electron induced transitions in the beryllium-like ion Fe^+22^ are calculated using the intermediate coupling frame transformation (ICFT) version of the R-matrix programs. Our target has 98 fine structure states ls^2^ nl n'l'SLJ corresponding to n=2 and n'=2, 3, 4. The present calculation is for electron impact energies in the range 3.15 to 380Ry. ************************************************************************** * * * Sorry, but the author(s) never supplied the tabular material * * announced in the paper * * * **************************************************************************
- ID:
- ivo://CDS.VizieR/J/A+A/489/1369
- Title:
- Atomic Data from the Iron Project LXVI. Fe^18+^
- Short Name:
- J/A+A/489/1369
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Accurate electron collisional data are required for the analysis of the Fe XIX astrophysical spectrum, in particular in the Sun. Such an analysis can provide information on the physical characteristics of the coronal plasma. An extensive target is used in an R-matrix scattering calculation to provide the necessary data for Fe^18+^. The use of the R-matrix method includes the resonance contribution lacking in the distorted wave approach and the large target improves the accuracy of the close-coupling approximation. The R-Matrix package described by Berrington et al. (1995) as provided by the UK RmaX project has been used to calculate electron collisional data among 342 levels of Fe^18+^. We have used the intermediate-coupling frame-transformation (ICFT) method (Griffin et al., 1998) to transform data obtained in a 166 term LS-coupling calculation. Contributions from the mass and Darwin interactions have also been included in the Hamiltonian. Collision strengths for all transitions between the 342 levels of Fe^18+^ are presented. They are tabulated over a wide range of electron temperatures of astrophysical interest. The results are compared with the earlier Iron Project work of Butler & Zeippen (2001, Cat. <J/A+A/372/1078>) and also with that of McLaughlin et al. (2001MNRAS.328..442M) and Landi & Gu (2006ApJ...640.1171L). The agreement is reasonable for the low-lying transitions. Larger differences are found for the more highly excited states. The file structure is described in detail in http://www.adas.ac.uk/man/appxa-04.pdf A sample program to extract a single upsilon is provided.
1529. Atomic data of CuI
- ID:
- ivo://CDS.VizieR/J/ApJS/211/30
- Title:
- Atomic data of CuI
- Short Name:
- J/ApJS/211/30
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- A complete set of atomic data of CuI, including the energy levels, oscillator strengths, and photoionization cross sections, is theoretically studied to investigate element abundance including nonlocal thermodynamic equilibrium (NLTE) effects. The calculations are carried out by using the R-matrix method in the LS-coupling scheme. Twenty terms of CuII are utilized as target states, and extensive configuration interactions are included to properly delineate the quantum states of CuII and CuI. One hundred thirteen bound states and 1699 oscillator strengths for E1 transitions between these states are obtained. Photoionization cross sections for all bound states are calculated in a photon energy range covering 1.28Ry from the threshold of the respective state. Resonances shown in the photoionization cross sections are identified, and some strong resonances are expected to play an important role in NLTE modeling. The atomic data in this work represent the first complete data set for copper abundance studies. Our results are compared with the experimental and other theoretical data wherever available.
- ID:
- ivo://CDS.VizieR/J/ApJS/211/31
- Title:
- Atomic data of vanadium (V I)
- Short Name:
- J/ApJS/211/31
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Radiative lifetimes of 79 levels belonging to the 3d^3^4s4p, 3d^4^4p, 3d^3^4s5p, 3d^4^5p, and 3d^3^4s4d configurations of V I with energy from 26604.807 to 46862.786cm^-1^ have been measured using time-resolved laser-induced fluorescence (TR-LIF) spectroscopy in laser-produced plasma. The lifetime values reported in this paper are in the range of 3.3-494ns, and the uncertainties of these measurements are within +/-10%. A good agreement was obtained with previous data. HFR+CPOL (Hartree-Fock with relativistic corrections method - Cowan; 1981tass.book.....C + core-polarization; Quinet et al. 1999MNRAS.307..934Q) calculations have been performed and used to combine the calculated branching fractions with the available experimental lifetimes to determine semi-empirical transition probabilities for 784 V I transitions.
