Open AccessJournal Article
Carbon dust formation on interstellar grains
TLDR
In this paper, a set of laboratory experiments is presented that study the evolution of solid organic matter at low temperature as a result of exposure to photons and ions, with the aim of simulating the formation and evolution of organic refractory mantles on interstellar grains.Abstract:
A set of laboratory experiments is presented that study the evolution of solid organic matter at low temperature as a result of exposure to photons and ions, with the aim of simulating the formation and evolution of organic refractory mantles on interstellar grains. Organic residue is a product of UV photolysed ice mantles in dense clouds and consists of 2-3 C atom containing compounds. From laboratory experiments, the efficiency of organic residue formation is given as a function of UV radiation dose. The yield of organic residue is so high that it probably is the major source of solid carbonaceous matter in the interstellar mediumread more
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Journal ArticleDOI
Organic Molecules in the Interstellar Medium, Comets, and Meteorites: A Voyage from Dark Clouds to the Early Earth
TL;DR: Our understanding of the evolution of organic molecules and their voyage from molecular clouds to the early solar system and Earth has changed dramatically as discussed by the authors, and our understanding of molecular evolution has been changed dramatically.
Journal ArticleDOI
Exchange-biased quantum tunnelling in a supramolecular dimer of single-molecule magnets
TL;DR: A supramolecular SMM dimer in which antiferromagnetic coupling between the two components results in quantum behaviour different from that of the individual SMMs, suggesting a means of tuning the quantum tunnelling of magnetization in SMMs.
Journal ArticleDOI
Amino acids from ultraviolet irradiation of interstellar ice analogues.
G. M. Muñoz Caro,Uwe J. Meierhenrich,W. A. Schutte,Bernard Barbier,A. Arcones Segovia,H. Rosenbauer,Wolfram Thiemann,A. Brack,J.M. Greenberg +8 more
TL;DR: The results demonstrate that the spontaneous generation of amino acids in the interstellar medium is possible, supporting the suggestion that prebiotic molecules could have been delivered to the early Earth by cometary dust, meteorites or interplanetary dust particles.
Book ChapterDOI
A voyage from dark clouds to the early Earth
TL;DR: In this article, it is shown that the same chemical pathways are widespread both in the Milky Way and in external galaxies and that the complexity of organic molecules in different space environments is determined by physical and chemical conditions, including density, temperature, ultraviolet radiation and energetic particle flux.
Journal ArticleDOI
Chemical evolution of star-forming regions
TL;DR: In this paper, the chemical processes that occur during all stages of the formation of stars, from the collapse of molecular clouds to the assemblage of icy planetesimals in protoplanetary accretion disks, are reviewed.