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Cosmic Petrology: the composition of bodies in young solar systems and infrared spectroscopy of circumstellar dust and meteorites

Friday 11 September 2015
from 15:15 to 17:00
at FA31
Speaker : Andreas Morlok (WWU Münster)
Abstract : Dust plays a central role in the study of young, forming planetary systems. In a circumstellar disk, the first, primitive materials form from pristine gas and dust particles. These are the building blocks for planetesimals forming by accretion in later stages. During the following growth of planets from collisions of these planetesimals in the debris disk stage, a second generation of dust is produced. With the help of astronomical infrared spectroscopy, it is possible to identify the mineralogical composition of the dust in those young solar systems – and thus get information about the composition of these bodies. We have material available from the equivalent phase in our early Solar System, 4.56 billion years ago, in the form of meteorites in our collections. Using infrared laboratory analyses of these materials, it is possible to link the detailed knowledge of meteorites available with the data from astronomical observations. I will present results from my work, which is about the comparisons of the infrared spectra and data of planetary materials from our early Solar System, and that from other, currently forming planetary systems. Earlier results of this ongoing work show indeed similarities in the mineralogy of the two data sets, which points towards a compositional similarity of bodies in our Solar System and others.

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