Leiden Ice Database for Astrochemistry


IR spectra and optical constants measured in the Leiden Laboratory for Astrophysics

The Leiden Laboratory Ice Database contains the infrared spectra of a massive number of astrophysical ice analogs at different temperatures and chemical environments. The data stored in this database have served the astronomical ice community since the '90s that helped to successfully interpret the observations carried out by ground- and space-based telescopes.

With the launching of the James Webb Space Telescope (JWST) on an Ariane 5 rocket from French Guiana on December 24th, 2021, the ice observations in star-forming regions will enter a gold age, and several questions regarding the ice mantle composition, structure and physical-chemical evolution will be answered. In particular, the JWST Early Release Science program called ICE AGE will shed light on several ice's open questions.

On this website, you will find a large and comprehensive number of public IR spectra and optical constants of astrophysical ice analogues, as well as online tools to support the ice spectral analysis of astronomical observations.