The Arcetri Spectral Code for optically thin plasmas

¹ E.O. Hulburt Center for Space Research, NRL, Washington DC 20375, USA
² Dipartimento di Astronomia e Scienza dello Spazio, Universita' di Firenze, Firenze, Italy

Corresponding author: E. Landi, landi@poppeo.nrl.navy.mil

Received: 20 November 2001
Accepted: 8 January 2002

Abstract

The Arcetri Spectral Code allows one to evaluate the spectrum of the radiation emitted by hot and optically thin plasmas in the spectral range 1–2000 Å. The Arcetri Code consists of a series of files that contain the emissivity of the plasma as a function of electron temperature and density. Both line and continuum emission are considered. These quantities are calculated using a database of atomic data and transition probabilities, mostly taken from the CHIANTI database. In the present work we describe the updates to the spectrum and present the new results. A comparison with the previous version of the code allows us to assess the improvements to the spectrum; comparison with other spectral codes allows us to assess the completeness of the Arcetri Code and of the CHIANTI database.