- 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 * * * **************************************************************************
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- 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.
- 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.
- ID:
- ivo://CDS.VizieR/VI/74
- Title:
- Atomic Energy Level Data
- Short Name:
- VI/74
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- This data set is a critical compilation of data on atomic energy levels for atoms and ions. For a number of the ions the levels have been derived or recalculated. In addition to the level value in cm-1 and the parity, the J value and the configuration and term assignments are listed if known. Leading percentages from the calculated eigenvectors are tabulated wherever available.
- ID:
- ivo://CDS.VizieR/J/A+A/416/655
- Title:
- Atomic lines in IR spectra for ultracool dwarfs
- Short Name:
- J/A+A/416/655
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We provide a set of atomic lines which are suitable for the description of ultracool dwarf spectra from 10000 to 25000{AA}. This atomic linelist was made using both synthetic spectra calculations and existing atlases of infrared spectra of Arcturus and Sunspot umbra. We present plots which show the comparison of synthetic spectra and observed Arcturus and Sunspot umbral spectra for all atomic lines likely to be observable in high resolution infrared spectra.
- ID:
- ivo://CDS.VizieR/J/ApJ/844/139
- Title:
- Atomic mass excesses
- Short Name:
- J/ApJ/844/139
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- X-ray burst model predictions of light curves and the final composition of the nuclear ashes are affected by uncertain nuclear masses. However, not all of these masses are determined experimentally with sufficient accuracy. Here we identify the remaining nuclear mass uncertainties in X-ray burst models using a one-zone model that takes into account the changes in temperature and density evolution caused by changes in the nuclear physics. Two types of bursts are investigated-a typical mixed H/He burst with a limited rapid proton capture process (rp-process) and an extreme mixed H/He burst with an extended rp-process. When allowing for a 3{sigma} variation, only three remaining nuclear mass uncertainties affect the light-curve predictions of a typical H/He burst (^27^P, ^61^Ga, and ^65^As), and only three additional masses affect the composition strongly (^80^Zr, ^81^Zr, and ^82^Nb). A larger number of mass uncertainties remain to be addressed for the extreme H/He burst, with the most important being ^58^Zn, ^61^Ga, ^62^Ge, ^65^As, ^66^Se, ^78^Y, ^79^Y, ^79^Zr, ^80^Zr, ^81^Zr, ^82^Zr, ^82^Nb, ^83^Nb, ^86^Tc, ^91^Rh, ^95^Ag, ^98^Cd, ^99^In, ^100^In, and ^101^In. The smallest mass uncertainty that still impacts composition significantly when varied by 3{sigma} is ^85^Mo with 16keV uncertainty. For one of the identified masses, ^27^P, we use the isobaric mass multiplet equation to improve the mass uncertainty, obtaining an atomic mass excess of -716(7)keV. The results provide a roadmap for future experiments at advanced rare isotope beam facilities, where all the identified nuclides are expected to be within reach for precision mass measurements.
- ID:
- ivo://CDS.VizieR/VI/69
- Title:
- Atomic Spectral Line List
- Short Name:
- VI/69
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- This compilation is aimed at providing a general catalog of atomic lines for comparatively low-ionized species, laying emphasis on their transition probabilities. Please refer to file "explain" for a detailed description.
- ID:
- ivo://CDS.VizieR/VI/73
- Title:
- Atomic Spectral Lines Data OII, Mg, Al, S, Sc
- Short Name:
- VI/73
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Atomic Spectral Lines Data O II, Mg I-XII, Al I-XIII, S I-XVI, Sc I-XXI. Using recent critical compilations of atomic energy levels, the authors calculate wavelengths (or wave numbers) from the differences of the energy levels. Results are given along with the observed values for all classified lines. Unless otherwise noted, the calculated values are in general more accurate than the observed values wherever the two values differ significantly. Some observed lines are classified as unresolved blends of two or more transitions. The calculated wavelength for each of the main components of such a blend is listed, or in some cases the calculated wavelength of the probable strongest component.
- ID:
- ivo://CDS.VizieR/J/ApJS/194/35
- Title:
- Atomic transition probabilities of Mn
- Short Name:
- J/ApJS/194/35
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The goal of the present work is to produce transition probabilities with very low uncertainties for a selected set of multiplets of MnI and MnII. Multiplets are chosen based upon their suitability for stellar abundance analysis. We report on new radiative lifetime measurements for 22 levels of MnI from the e^8^D, z^6^P, z^6^D, z^4^F, e^8^S, and e^6^S terms and six levels of MnII from the z^5^P and z^7^P terms using time-resolved laser-induced fluorescence on a slow atom/ion beam. New branching fractions for transitions from these levels, measured using a Fourier-transform spectrometer, are reported.
