Results 11 to 20 of about 2,145,468 (291)
Anharmonic interstellar PAH molecules [PDF]
International Journal of Quantum Chemistry, 2016 AbstractPolycyclic aromatic hydrocarbon (PAH) molecules are responsible for a family of features, the aromatic infrared bands, which are observed in many astronomical environments. The photophysics and photochemistry of PAHs in space is strongly influenced by anharmonicity, which has seldom been considered in astrophysical modeling because of the lack ...
Candian, A., Mackie, C.J.
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Aromatics and Cyclic Molecules in Molecular Clouds: A New Dimension of Interstellar Organic Chemistry. [PDF]
Journal of Physical Chemistry A, 2021 Astrochemistry lies at the nexus of astronomy, chemistry, and molecular physics. On the basis of precise laboratory data, a rich collection of more than 200 familiar and exotic molecules have been identified in the interstellar medium, the vast majority ...
M. McCarthy, B. McGuire
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Binding Energies of Interstellar Molecules on Crystalline and Amorphous Models of Water Ice by Ab Initio Calculations [PDF]
Astrophysical Journal, 2020 In the denser and colder (≤20 K) regions of the interstellar medium (ISM), near-infrared observations have revealed the presence of submicron-sized dust grains covered by several layers of H2O-dominated ices and “dirtied” by the presence of other ...
S. Ferrero +5 more
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Dust evolution, a global view I. Nanoparticles, nascence, nitrogen and natural selection … joining the dots [PDF]
Royal Society Open Science, 2016 The role and importance of nanoparticles for interstellar chemistry and beyond is explored within the framework of The Heterogeneous dust Evolution Model for Interstellar Solids (THEMIS), focusing on their active surface chemistry, the effects of ...
A. P. Jones
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Mid-infrared Spectroscopy of Protonated Benzonitrile, 2-Cyanonaphthalene, and 9-Cyanoanthracene for Astrochemical Consideration. [PDF]
ChemphyschemExperimental infrared absorption spectra of three protonated cyano‐substituted PAHs measured by infrared multiple photon dissociation using the free‐electron laser Free‐Electron Laser for Infrared eXperiments are studied. These spectra are compared to an emission spectrum measured by JWST, and the largest measured protonated cyano‐PAH, cyanoanthracene,
Rasmussen AP +6 more
europepmc +2 more sources
Dust evolution, a global view: III. Core/mantle grains, organic nano-globules, comets and surface chemistry [PDF]
Royal Society Open Science, 2016 Within the framework of The Heterogeneous dust Evolution Model for Interstellar Solids (THEMIS), this work explores the surface processes and chemistry relating to core/mantle interstellar and cometary grain structures and their influence on the nature ...
A. P. Jones
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Presumed Detection of C5 Molecule in the Interstellar Medium
The Astrophysical Journal, 2022 The paper suggests the presence of the carbon chain C _5 molecule in translucent, interstellar H i clouds. This species, the only five atom interstellar molecule, observable in dark, translucent clouds, seems to be observable in reasonably dense clouds ...
J. Krełowski, R. Hakalla, W. Szajna
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Symposium - International Astronomical Union, 1970 The observation of molecules in the interstellar medium offers an excellent oppor- tunity to specify the physical conditions present there. This must be done through the combined use of theory and observation. In the last few years the advancement in this area has accelerated spectacularly.
Theodore P. Stecher, E. E. Salpeter
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The Astrophysical Journal, 2023 The carbon ( ^3 P) atom is a reactive species that, according to laboratory experiments and theoretical calculations, condensates with interstellar ice components.
Stefano Ferrero +4 more
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