Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997a%26as..125..149d&link_type=abstract
A & A Supplement series, Vol. 125, October 1997, 149-173.
Astronomy and Astrophysics
Astronomy
724
Atomic Data, Astronomical Data Bases: Miscellaneous, Ultraviolet: General, Sun: Atmosphere, Stars: Atmosphere
Scientific paper
A comprehensive set of accurate atomic data is required for analyses of astrophysical and solar spectra. CHIANTI provides a database of atomic energy levels, wavelengths, radiative data and electron excitation data for ions which are abundant in cosmic plasmas. The most recent electron excitation data have been assessed and stored following the method of \cite[Burgess \& Tully (1992)]{bur92}. The current version is essentially complete for specifying the emission spectrum at wavelengths greater than 50 Angstroms. A list of observed lines in the spectral region between 50 and 1100 Angstroms has been compiled and compared with the lines predicted by the CHIANTI database. The CHIANTI database reproduces the vast majority of lines observed at these wavelengths. CHIANTI includes IDL (Interactive Data Language) routines to calculate optically thin synthetic spectra for equilibrium conditions. IDL routines to calculate theoretical line intensities required for electron density or temperature diagnostics and emission measure studies are also included. The CHIANTI atomic database and supporting IDL routines are available by anonymous FTP.
Dere Ken P.
Landi Enrico
Mason Harris E.
Monsignori Fossi Brunella C.
Young Paul R.
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