Benchmarking Atomic Data for Astrophysics: Be-like Ions between B II and Ne VII

Abstract

Large-scale self-consistent multiconfiguration Dirac--Hartree--Fock and relativistic configuration interaction calculations are reported for the $n\le 6$ levels in Be-like ions from B II to Ne VII. Effects from electron correlation are taken into account by means of large expansions in terms of a basis of configuration state functions, and a complete and accurate data set of excitation energies, lifetimes, wavelengths, and electric dipole, magnetic dipole, electric quadrupole, and magnetic quadrupole line strengths, transition rates, and oscillator strengths for these levels is provided for each ion. Comparisons are made with available experimental and theoretical results. The uncertainty of excitation energies is assessed to be 0.01\% on average, which makes it possible to find and rule out misidentifications and aid new line identifications involving high-lying levels in astrophysical spectra. The complete data set is also useful for modeling and diagnosing astrophysical plasmas.

References in corpus (11)

• Atomic Data for X-ray Astrophysics
• Experimental and theoretical oscillator strengths of Mg I for accurate abundance analysis
• Hyperfine structures and Landé $g_J$-factors for $n=2$ states in beryllium-, boron-, carbon-, and nitrogen-like ions from relativistic configuration interaction calculations
• Extended relativistic configuration interaction and many-body perturbation calculations of spectroscopic data for the $n\le 6$ configurationsin ne-like ions between Cr XV and Kr XXVII
• Extended Calculations of Spectroscopic Data: Energy Levels, Lifetimes and Transition rates for O-like ions from Cr XVII to Zn XXIII
• Solar transition region above sunspots
• Thermodynamic Spectrum of Solar Flares Based on SDO/EVE Observations: Techniques and Statistical Results
• Third-order many-body perturbation theory calculations for the beryllium and magnesium isoelectronic sequences
• Electron impact excitation of N IV: calculations with the DARC code and a comparison with ICFT results
• Electron-impact excitation of N${}^{3+}$ using the B-spline R-matrix method: Importance of the target structure description and the size of the close-coupling expansion
• The X-ray spectrum of delta Orionis observed by LETGS aboard Chandra

Cited by in corpus (8)

• Large-scale multiconfiguration Dirac-Hartree-Fock calculations for astrophysics: Cl-like ions from Cr~VIII to Zn~XIV
• Energy Levels, Lifetimes and Transition rates for P-like ions from Cr X to Zn XVI from large-scale Relativistic Multiconfiguration Calculations
• Optical spectroscopy of Galactic field Classical Be stars
• Extended calculations of energy levels, radiative properties, and lifetimes for oxygen-like Mo XXXV
• Large-scale multiconfiguration Dirac-Hartree-Fock calculations for astrophysics: n=4 levels in P-like ions from Mn~XI to Ni~XIV
• Extended Calculations with Spectroscopic Accuracy: Energy Levels and Radiative Rates for O-like Ions between Ar XI and Cr XVII
• Extended calculations of energy levels, radiative properties, $A_J$, $B_J$ hyperfine interaction constants, and Landé $g_J$-factors for nitrogen-like \mbox{Ge XXVI}
• High-precision calculations of the $1s^{2}2s2p$ ${}^1{P}_1\to 1s^{2}2s^2$ ${}^1{S}_0$ spin-allowed $E1$ transition in C {\small III}