Laboratory mid-IR spectra of equilibrated and igneous meteorites: Searching for observables of planetesimal debris

Meteorites contain minerals from Solar System asteroids with differentproperties (like size, presence of water, core formation). We providenew mid-IR transmission spectra of powdered meteorites to obtaintemplates of how mid-IR spectra of asteroidal debris would look like.This is essential for interpreting mid-IR spectra of past and futurespace observatories, like the James Webb Space Telescope. First wepresent new transmission spectra of powdered ordinary chondrite,pallasite and HED meteorites and then we combine them with alreadyavailable transmission spectra of chondrites in the literature, giving atotal set of 64 transmission spectra. In detail we study the spectralfeatures of minerals in these spectra to obtain measurables used tospectroscopically distinguish between meteorite groups. Being able todifferentiate between dust from different meteorite types means we canprobe properties of parent bodies, like their size, if they were wet ordry and if they are differentiated (core formation) or not.We show that the transmission spectra of wet and dry chondrites,carbonaceous and ordinary chondrites and achondrite and chondritemeteorites are distinctly different in a way one can distinguish inastronomical mid-IR spectra. Carbonaceous chondrites type