Here we provide an assortment of stellar spectra of interest to planetary modelers, model-generated planetary spectra of Earth, and a collection of line lists and absorption cross-sections for molecules of relevance to planetary atmospheres and biosignatures:
Molecular Line Lists and Absorption Cross-Sections
Of critical importance to our spectrum simulators are spectroscopic line lists, which describe the wavelength and strength of gas absorption lines from the ultraviolet to the far-infrared, as well as how the line shapes depend on various input parameters (e.g. temperature and pressure). These data come from a variety of sources, including lab measurements and theoretical calculations. We maintain this database by collecting data from updated, existing line lists (e.g. HITRAN, GEISA), and compiling data from new, peer-reviewed studies. We also provide a related tool to plot line list data for a user-selected molecule, database, and wavelength/wavenumber range.
Molecular Spectral Search Engine
This tool allows the user to query the HITRAN data and view the spectra of molecules that have features within a given wave number/wavelength range. The user can then identify molecules that correspond to spectroscopic features in spectra obtained by spacecraft or telescopes.
Our stellar spectra include two M-stars: AD Leo (M4.5V) and GJ 644 (M3.5Ve) (Segura, et al, 2005), and five others from publications by the VPL team spanning from far-ultraviolet to far-infrared (the Sun; the F2V HD128167; the G0V low-activity star HD114710; the G0V high-activity star HD206860; and the K2V star HD22049.)
M Star Spectra: Two spectra from Segura, et al, 2005: AD Leo (M4.5V) and GJ 644 (M3.5Ve). Images and Data.
Other Stellar Spectra: Five stellar spectra from publications by the VPL team spanning from far-ultraviolet to far-infrared (the Sun; the F2V HD128167; the G0V low-activity star HD114710; the G0V high-activity star HD206860; and the K2V star HD22049.) Images and Data.
Biological Pigment Spectra
A database of spectral absorbance or absorption coefficients of biological pigments, including but not limited to photosynthetic pigments and screening compounds for protection against radiation.