44 citations · 246 across the 15 of their papers we have counts for
15 papers
Atomic Data Revisions for Transitions Relevant to Observations of Interstellar, Circumgalactic, and Intergalactic Matter
Frances H. Cashman, Varsha P. Kulkarni, Romas Kisielius +2
Measurements of element abundances in galaxies from astrophysical spectroscopy depend sensitively on the atomic data used. With the goal of making the latest atomic data accessible…
Energy levels and radiative rates for transitions in Fe V, Co VI and Ni VII
K. M. Aggarwal, P. Bogdanovich, F. P. Keenan +1
Energy levels, Landé -factors and radiative lifetimes are reported for the lowest 182 levels of the 3d, 3d4s and 3d4p configurations of Fe~V, Co~VI and Ni~VII. Addit…
Energy levels and radiative rates for Cr-like Cu VI and Zn VII
K. M. Aggarwal, P. Bogdanovich, F. P. Keenan +1
Energy levels and radiative rates (A-values) for transitions in Cr-like Cu~VI and Zn~VII are reported. These data are determined in the quasi-relativistic approach (QR), by employi…
Energy levels and radiative rates for transitions in Cr-like Co IV and Ni V
K. M. Aggarwal, P. Bogdanovich, R. Karpuškienė +3
We report calculations of energy levels and radiative rates (-values) for transitions in Cr-like Co IV and Ni V. The quasi-relativistic Hartree-Fock (QRHF) code is adopted for c…
Stout: Cloudy's Atomic and Molecular Database
M. L. Lykins, G. J. Ferland, R. Kisielius +6
We describe a new atomic and molecular database we developed for use in the spectral synthesis code Cloudy. The design of Stout is driven by the data needs of Cloudy, which simulat…
Energy level properties of 4p4d, 4p4d4f and 4p4d configurations of W ion
P. Bogdanovich, R. Kisielius
The ab initio quasirelativistic Hartree-Fock method developed specifically for the calculation of spectroscopic parameters of heavy atoms and highly charged ions was used to derive…
Theoretical energy level spectra and transition data for 4p4d, 4p4d4f and 4p4d configurations of W ion
P. Bogdanovich, R. Kisielius
The ab initio quasirelativistic Hartree-Fock method developed specifically for the calculation of spectral parameters of heavy atoms and highly charged ions is used to derive trans…
Theoretical energy level spectra and transition data for 4p4d, 4p4f and 4p4d configurations of W ion
P. Bogdanovich, R. Kisielius
The ab initio quasirelativistic Hartree-Fock method developed specifically for the calculation of spectral parameters of heavy atoms and highly charged ions was applied to determin…
Significance of M2 and E3 transitions for and configuration metastable level lifetimes
R. Karpuškienė, P. Bogdanovich, R. Kisielius
Magnetic quadrupole and electric octupole transitions from the configurations and were calculated along with magnetic dipole, electric dipole and el…
Methods, algorithms and computer codes for calculation of electron-impact excitation parameters
P. Bogdanovich, R. Kisielius, D. Stonys
We describe the computer codes, developed at Vilnius University, for the calculation of electron-impact excitation cross sections, collision strengths, and excitation rates in the…
Quasirelativistic calculation of 4s4p, 4s4p4d and 4s4p configuration spectroscopic parameters for the W ion
P. Bogdanovich, R. Karpuškienė, R. Kisielius
The ab initio quasirelativistic Hartree-Fock method developed specifically for the calculation of spectral parameters of heavy atoms and highly charged ions is used to derive spect…
Metastable level properties of the excited configuration
R. Karpuškienė, P. Bogdanovich, R. Kisielius
Metastable levels in rhodium-like ions with the ground configuration and the excited configurations and are investigated. The {\sl a…
Atomic data for Zn II - Improving Spectral Diagnostics of Chemical Evolution in High-redshift Galaxies
Romas Kisielius, Varsha P. Kulkarni, Gary J. Ferland +3
Damped Lyman-alpha (DLA) and sub-DLA absorbers in quasar spectra provide the most sensitive tools for measuring element abundances of distant galaxies. Estimation of abundances fro…
Atomic data for S II - Toward Better Diagnostics of Chemical Evolution in High-redshift Galaxies
Romas Kisielius, Varsha P. Kulkarni, Gary J. Ferland +2
Absorption-line spectroscopy is a powerful tool used to estimate element abundances in the nearby as well as distant universe. The accuracy of the abundances thus derived is, natur…
Expanded Iron UTA spectra -- probing the thermal stability limits in AGN clouds
G. J. Ferland, R. Kisielius, F. P. Keenan +5
The Fe unresolved transition array (UTAs) produce prominent features in the 15-17?A wavelength range in the spectra of Active Galactic Nuclei (AGN). Here we present new calculation…