CHIANTI

An Atomic Database for Spectroscopic Diagnostics of Astrophysical Plasmas.


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Naval Research Laboratory (USA) - Rutherford Appleton Laboratory (UK) - University College of London - MSSL (UK)
University of Cambridge (UK) - George Mason University (USA) - Universita' degli Studi di Firenze (Italy)

CHIANTI consists of a critically evaluated set of up-to-date atomic data, together with user-friendly programs written in Interactive Data Language (IDL) to calculate the spectra from astrophysical plasmas.

The CHIANTI package is freely available to all researchers.
If you use the package, we only ask you to appropriately acknowledge CHIANTI .



- The Chianti wine-producing area of Tuscany, Italy -

CHIANTI Version 5.2.1 Released ! 

CHIANTI 5.2.1 (Jul 2008) corrects for a an error in the collisional file of Fe XIII that affected the emissivities of a few lines.

CHIANTI 5 includes new physical processes, a number of improvements to the database, and more efficient software algorithms. The most important changes concern the X-ray and the UV wavelength ranges, as well as a few crucial ions in the EUV (see the history file )

Major features (Landi et al. 2006, ApJS, 162, 261) in CHIANTI 5 are:

  • inclusion of ionization and recombination effects in level population calculation
  • photoexcitation from any user-provided radiation field
  • software to account for non-maxwellian distribution of velocities
  • new data for Fe IX, Fe XII, Fe XV (EUV )
  • new data for Fe XVII to Fe XXIII (X-rays )
  • new data for n=3 to n=3 N-like and O-like transitions (UV )
  • new ions (P XIV, XV;   Cl II, X, XI, XII, XVII;   K V, XVII, XIX;   Ca VII, VIII;   Co XX;   Zn XXIII)
  • many existing ion data-sets have been updated
  • the software has been improved and speeded considerably

We are grateful to individual scientists and funding agencies for their support.