Collisions between carbonaceous grains in the interstellar medium [PDF]
Astronomy & Astrophysics, 2003 Semi-empirical molecular dynamics is used to simulate hydrocarbon grain sputtering and collisions which are extremely difficult to study experimentally.
R. Papoular
semanticscholar +4 more sources
The Ni isotopic composition of Ryugu reveals a common accretion region for carbonaceous chondrites [PDF]
Science AdvancesThe isotopic compositions of samples returned from Cb-type asteroid Ryugu and Ivuna-type (CI) chondrites are distinct from other carbonaceous chondrites, which has led to the suggestion that Ryugu/CI chondrites formed in a different region of the ...
F. Spitzer +90 more
semanticscholar +4 more sources
Radial distribution of the carbonaceous nano-grains in the protoplanetary disk around HD 169142 [PDF]
, 2022 HD 169142 is part of the class of (pre-)transitional protoplanetary disks showing multiple carbon nanodust spectroscopic signatures (aromatic, aliphatic) dominating the infrared spectrum.
Marie Devinat +6 more
core +4 more sources
Experimental H2O formation on carbonaceous dust grains at temperatures up to 85 K [PDF]
Monthly Notices of the Royal Astronomical Society, 2023 ABSTRACT Water represents the main component of the icy mantles on dust grains, it is of extreme importance for the formation of new species and it represents the main component for life. Water is observed both in the gas-phase and frozen in the interstellar medium (ISM), where the solid-phase formation route has been proven essential to
Francesco Grieco +3 more
openalex +4 more sources
Low-temperature condensation of carbonaceous dust grains from PAHs [PDF]
Proceedings of the International Astronomical Union, 2019 AbstractInterstellar carbon has been detected in both gas-phase molecules and solid particles. The goal of this study is to identify the link between these two phases of cosmic carbon. Here we report preliminary results on the low temperature formation of carbonaceous dust grains from gas-phase aromatic hydrocarbon precursors.
Lisseth Gavilan +7 more
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Ab-initio dynamic study of mechanisms for dust-mediated molecular hydrogen formation in space [PDF]
Communications ChemistryThe reason for the abundance of molecular hydrogen (H2) in space remains unresolved. Here we study collision dynamics under spacelike conditions to test H2 formation mechanisms where carbonaceous dust grains may have a catalytic role.
Yuzhen Guo, David R. McKenzie
doaj +2 more sources
Effects of structural and chemical disorders on the vis/UV spectra of carbonaceous interstellar grains [PDF]
Monthly Notices of the Royal Astronomical Society, 2013 14 pages, 16 figures, to appear in ...
R. Papoular +4 more
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On the Interstellar Extinction Hump and Laboratory Carbonaceous Grains
The Astrophysical Journal, 1996 A. Blanco, S. Fonti, V. Orofino
semanticscholar +3 more sources
Brecciation at the grain scale within the lithologies of the Winchcombe Mighei‐like carbonaceous chondrite [PDF]
Meteoritics & Planetary ScienceAbstractThe Mighei‐like carbonaceous (CM) chondrites have been altered to various extents by water–rock reactions on their parent asteroid(s). This aqueous processing has destroyed much of the primary mineralogy of these meteorites, and the degree of alteration is highly heterogeneous at both the macroscale and nanoscale.
Luke Daly +52 more
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Void structures in olivine grains in thermally metamorphosed Antarctic carbonaceous chondrite B-7904
, 1994 P(論文)The Antarctic carbonaceous chondrite Belgica-7904 suffered thermal metamorphism. The main constituent phyllosilicates of this meteorite are serpentine and/or saponite, which display transformation from serpentine to olivine or from saponite to ...
Junji Akai
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