Transition frequency shifts with fine structure constant variation for Fe II: Breit and core-valence correlation correction

Abstract

Transition frequencies of Fe II ion are known to be very sensitive to variation of the fine structure constant α. The resonance absorption lines of Fe II from objects at cosmological distances are used in a search for the possible variation of αin cause of cosmic time. In this paper we calculated the dependence of the transition frequencies on α^2 (q-factors) for Fe II ion. We found corrections to these coefficients from valence-valence and core-valence correlations and from the Breit interaction. Both the core-valence correlation and Breit corrections to the q-factors appeared to be larger than had been anticipated previously. Nevertheless our calculation confirms that the Fe II absorption lines seen in quasar spectra have large q-factors of both signs and thus the ion Fe II alone can be used in the search for the α-variation at different cosmological epochs.

7 pages, submitted to Phys. Rev. A

References in corpus (16)

• Dynamics of dark energy
• Further evidence for a variable fine-structure constant from Keck/HIRES QSO absorption spectra
• Possible evidence for a variable fine structure constant from QSO absorption lines: motivations, analysis and results
• Limits on the time variation of the electromagnetic fine-structure constant in the low energy limit from absorption lines in the spectra of distant quasars
• Probing the variability of the fine-structure constant with the VLT/UVES
• Most precise single redshift bound to Delta alpha/alpha
• A new measure of Delta alpha/alpha at redshift z = 1.84 from very high resolution spectra of Q1101-264
• On the use of the $V^{N-M}$ approximation in atomic calculations
• VLT/UVES constraints on the cosmological variability of the fine-structure constant
• High-precision calculations of electric-dipole amplitudes for transitions between low-lying levels of Mg, Ca, and Sr
• Parity non-conservation in thallium
• The $\alpha$-dependence of transition frequencies for ions Si II, Cr II, Fe II, Ni II, and Zn II
• Space-time variation of the fine structure constant and evolution of isotope abundances
• Core-valence correlations for atoms with open shells
• High-precision calculations of In I and Sn II atomic properties
• Calculation of the energy levels of Ge, Sn, Pb and their ions in the $V^{N-4}$ approximation

Cited by in corpus (24)

• Search for New Physics with Atoms and Molecules
• Wavelength Accuracy of the Keck HIRES Spectrograph and Measuring Changes in the Fine Structure Constant
• First measurement of Mg isotope abundances at high redshifts and accurate estimate of Delta alpha/alpha
• UVES radial velocity accuracy from asteroid observations. Implications for the fine structure constant variability
• Wavelength Calibration of the VLT-UVES Spectrograph
• Artificial intelligence applied to the automatic analysis of absorption spectra. Objective measurement of the fine structure constant
• Laboratory atomic transition data for precise optical quasar absorption spectroscopy
• Microwave and submillimeter molecular transitions and their dependence on fundamental constants
• A new approach for testing variations of fundamental constants over cosmic epochs using FIR fine-structure lines
• Relativistic corrections to transition frequencies of Fe I and search for variation of the fine structure constant
• Particle-hole configuration interaction and many-body perturbation theory: application to Hg+
• Study of the correlation effects in Yb^+ and implications for parity violation
• Atomic calculations and search for variation of the fine structure constant in quasar absorption spectra
• Transition frequency shifts with fine-structure constant variation for Fe I. Isotope shift calculations in Fe I and Fe II
• Mid- and far-infrared fine-structure line sensitivities to hypothetical variability of the fine-structure constant
• Atomic transition frequencies, isotope shifts, and sensitivity to variation of the fine structure constant for studies of quasar absorption spectra
• Searching for spatial variations of alpha^2/mu in the Milky Way
• Transitions in Zr, Hf, Ta, W, Re, Hg, Ac and U ions with high sensitivity to variation of the fine-structure constant
• Constraining fundamental constants of physics with quasar absorption line systems
• Transition frequency shifts with fine-structure constant variation for Yb II
• Possible time-variability of the fine-structure constant expected from the accelerating universe
• Revised fits to $\Delta \alpha /\alpha$ in consistency with the accelerating universe
• Sensitivity of the energy levels of singly ionized cobalt to the variation of the fine structure constant
• Sensitivity coefficients to $\alpha$-variation for astrophysically relevant transitions in Ni II