CHIANTI—An Atomic Database for Emission Lines. XV. Version 9, Improvements for the X-Ray Satellite Lines

CHIANTI contains a large quantity of atomic data for the analysis of astrophysical spectra. Programs are available in IDL and Python to perform calculation of the expected emergent spectrum from these sources. The database includes atomic energy levels, wavelengths, radiative transition probabilities, rate coefficients for collisional excitation, ionization, and recombination, as well as data to calculate free-free, free-bound, and two-photon continuum emission. In Version 9, we improve the modelling of the satellite lines at X-ray wavelengths by explicitly including autoionization and dielectronic recombination processes in the calculation of level populations for select members of the lithium isoelectronic sequence and Fe XVIII-XXIII. In addition, existing datasets are updated, new ions added and new total recombination rates for several Fe ions are included. All data and IDL programs are freely available at this http URL or through SolarSoft and the Python code ChiantiPy is also freely available at this https URL.

[1]  C. Fischer,et al.  Relativistic energy levels, lifetimes, and transition probabilities for the sodium-like to argon-like sequences , 2006 .

[2]  J. Nilsen,et al.  COMPARISON OF SATELLITE SPECTRA FOR H-LIKE Fe AND He-LIKE Fe, Ca, AND S CALCULATED BY THREE DIFFERENT METHODS , 1997 .

[3]  Alan H. Gabriel,et al.  Dielectronic Satellite Spectra for Highly-Charged Helium-Like Ion Lines , 1972 .

[4]  N. Badnell,et al.  Electron-ion recombination for Fe VIII forming Fe VII and Fe IX forming Fe VIII : measurements and theory , 2008 .

[5]  Claudio Mendoza,et al.  A Complete Set of Radiative and Auger Rates for K-vacancy States in Fe XVIII-Fe XXV , 2003 .

[6]  H. Mason,et al.  Spectroscopy of Very Hot Plasma in Non-flaring Parts of a Solar Limb Active Region: Spatial and Temporal Properties , 2017, 1707.08445.

[7]  Helen E. Mason,et al.  Solar UV and X-ray spectral diagnostics , 2018, Living Reviews in Solar Physics.

[8]  R. Saykally,et al.  Accurate determination of the fine-structure intervals in the 3P ground states of C-13 and C-12 by far-infrared laser magnetic resonance , 1986 .

[9]  A. Burgess.  Delectronic Recombination and the Temperature of the Solar Corona. , 1964 .

[10]  Peter R. Young,et al.  CHIANTI - an atomic database for emission lines. IX. Ionization rates, recombination rates, ionization equilibria for the elements hydrogen through zinc and updated atomic data , 2009 .

[11]  D. Lunney,et al.  Atomic Data and Nuclear Data Tables , 2015 .

[12]  John D. Hunter,et al.  Matplotlib: A 2D Graphics Environment , 2007, Computing in Science & Engineering.

[13]  Jacobs,et al.  Effects of initial-state population variations on the 2p-->1s K alpha dielectronic satellite spectra of highly ionized iron ions in high-temperature astrophysical and laboratory plasmas. , 1989, Physical review. A, General physics.

[14]  N. Badnell.  Radiative Recombination Data for Modeling Dynamic Finite-Density Plasmas , 2006, astro-ph/0604144.

[15]  A. Surzhykov,et al.  Relativistic configuration-interaction calculation of energy levels of core-excited states in lithiumlike ions: Argon through krypton , 2012, 1209.6520.

[16]  M. Gu,et al.  Indirect X-Ray Line-Formation Processes in Iron L-Shell Ions , 2003 .

[17]  J. L. Culhane,et al.  The soft X-ray polychromator for the Solar Maximum Mission , 1980 .

[18]  Peter R. Young,et al.  CHIANTI—An Atomic Database for Emission Lines. VII. New Data for X-Rays and Other Improvements , 2006 .

[19]  A. Gabriel,et al.  Measurement and interpretation of dielectronic recombination satellite line intensities , 1972 .

[20]  J. Dubau,et al.  Dielectronic recombination and its applications in astronomy , 1980 .

[21]  Ester Antonucci,et al.  X-ray spectra of solar flares obtained with a high-resolution bent crystal spectrometer , 1981 .

[22]  L. Vainshtein,et al.  Wavelengths and transition probabilities of satellites to resonance lines of H- and He-like ions , 1978 .

[23]  G. del Zanna,et al.  Energy Levels, Lifetimes, and Transition Rates for P-like Ions from Cr x to Zn xvi from Large-scale Relativistic Multiconfiguration Calculations , 2018, 1802.09671.

[24]  S. Kahn,et al.  Modeling of high-resolution Kα emission spectra from Fe XVIII through Fe XXIV , 2003 .

[25]  R. D. Cowan,et al.  Soft x-ray polychromator for the solar maximum mission: inner-shell transitions in Fe XIX-XXII in the x-ray spectra of solar flares and tokamaks , 1983 .

[26]  S. Epp,et al.  X-ray resonant photoexcitation: linewidths and energies of Kα transitions in highly charged Fe ions. , 2013, Physical review letters.

[27]  J. Zhang,et al.  THERMODYNAMIC SPECTRUM OF SOLAR FLARES BASED ON SDO/EVE OBSERVATIONS: TECHNIQUES AND FIRST RESULTS , 2015, 1507.08895.

[28]  U. Feldman,et al.  FORBIDDEN AND INTERCOMBINATION LINES OF RR TELESCOPII: WAVELENGTH MEASUREMENTS AND ENERGY LEVELS , 2011, 1102.3101.

[29]  Gang Zhao,et al.  Electron Impact Excitation of N-like Ca XIV , 2012 .

[30]  A. Gabriel,et al.  Dielectronic satellite spectra for highly charged helium-like ions – V. Effect of total satellite contribution on the solar flare iron spectra , 1979 .

[31]  Matteo Guainazzi,et al.  Atomic data and spectral modeling constraints from high-resolution X-ray observations of the Perseus cluster with Hitomi , 2017, 1712.05407.

[32]  K. Dere.  Ionization rate coefficients for the elements hydrogen through zinc , 2007 .

[33]  Kenneth J. H. Phillips,et al.  Ultraviolet and X-ray Spectroscopy of the Solar Atmosphere , 2008 .

[34]  L. Vainshtein,et al.  Atomic data for doubly-excited states 2lnl′ of He-like ions and 1s2lnl′ of Li-like ions with Z=6–36 and n=2,3 , 2017 .

[35]  N. R. Badnell,et al.  A Breit-Pauli distorted wave implementation for autostructure , 2011, Comput. Phys. Commun..

[36]  C. Rapley,et al.  New Results from the Solar Maximum Mission/Bent Crystal Spectrometer , 2017, 1702.06893.

[37]  H. Mason,et al.  Benchmarking atomic data for astrophysics: $\ion{Fe}{x}$ , 2004 .

[38]  U. Feldman,et al.  The lithium-like spectra of K XVII through Mn XXIII in the extreme-ultraviolet region. , 1972 .

[39]  G. del Zanna,et al.  CHIANTI—An Atomic Database for Emission Lines. IV. Extension to X-Ray Wavelengths , 2001 .

[40]  M. G. O'Mullane,et al.  Dielectronic recombination data for dynamic finite-density plasmas - I. Goals and methodology , 2003, astro-ph/0304273.

[41]  H. Mason,et al.  CHIANTI - An atomic database for Emission Lines. Version 8 , 2015, 1508.07631.

[42]  B. Edĺen,et al.  Atomic Energy States of an Unusual Type , 1939, Nature.

[43]  B. Fawcett,et al.  Analysis of n=3 to n=4 spectra for ions from Mg X to Fe XXIV and P XI, XII , 1981 .

[44]  N. Badnell,et al.  R-matrix electron-impact excitation data for the Li-like iso-electronic sequence including Auger and radiation damping , 2011 .

[45]  C. Jordan,et al.  Long Wavelength Satellites to the He-like Ion Resonance Lines in the Laboratory and in the Sun , 1969, Nature.

[46]  H. Mason,et al.  CHIANTI—AN ATOMIC DATABASE FOR EMISSION LINES. XII. VERSION 7 OF THE DATABASE , 2012 .