Results 21 to 30 of about 5,588,447 (203)

Radical reactions on interstellar icy dust grains: Experimental investigations of elementary processes

open access: yesProceedings of the Japan Academy, Series B, 2023
Molecular clouds (MCs) in space are the birthplace of various molecular species. Chemical reactions occurring on the cryogenic surfaces of cosmic icy dust grains have been considered to play important roles in the formation of these species. Radical reactions are crucial because they often have low barriers and thus proceed even at low temperatures ...
TSUGE, Masashi, WATANABE, Naoki
openaire   +3 more sources

High‐Pressure Carbonaceous Phases as Minerals

open access: yesGeophysical Monograph Series, Page 11-23., 2020

This book is Open Access. A digital copy can be downloaded for free from Wiley Online Library.

Explores the behavior of carbon in minerals, melts, and fluids under extreme conditions

Carbon trapped in diamonds and carbonate-bearing rocks in subduction zones are examples of the continuing exchange of substantial carbon ...
Oliver Tschauner
wiley  

+1 more source

INVESTIGATION OF CARBONACEOUS INTERSTELLAR DUST ANALOGUES BY INFRARED SPECTROSCOPY: EFFECTS OF ENERGETIC PROCESSING [PDF]

open access: yesProceedings of the 70th International Symposium on Molecular Spectroscopy, 2015
Carbonaceous compounds, both solids and gas-phase molecules, are found in very diverse astronomical mediaa. A significant amount of the elemental carbon is found in small dust grains. This carbonaceous dust, mostly formed in the last stages of evolution of C-rich stars, is the carrier of characteristic IR absorption bands revealing the presence of ...
Belén Maté   +3 more
openaire   +2 more sources

Synergies between interstellar dust and heliospheric science with an interstellar probe [PDF]

open access: yes, 2023
We discuss the synergies between heliospheric and dust science, the open science questions, the technological endeavours, and programmatic aspects that are important to maintain or develop in the decade to come.
Redfield, S   +139 more
core   +4 more sources

Turbulence in the interstellar medium [PDF]

open access: yes, 2014
Turbulence is ubiquitous in the insterstellar medium and plays a major role in several processes such as the formation of dense structures and stars, the stability of molecular clouds, the amplification of magnetic fields, and the re-acceleration and ...
Chian, A. C. -L.   +9 more
core   +2 more sources

Evidence for interstellar origin of seven dust particles collected by the Stardust spacecraft [PDF]

open access: yes, 2014
Seven particles captured by the Stardust Interstellar Dust Collector and returned to Earth for laboratory analysis have features consistent with an origin in the contemporary interstellar dust stream.
D. R. Frank (7636637)   +65 more
core   +5 more sources

Shock processing of interstellar dust - Diamonds in the sky

open access: yesThe Astrophysical Journal, 1987
The processing of interstellar dust grains by strong shock waves is studied, with the emphasis on the effects of grain-grain collisions. Such collisions provide the high pressures required to transform interstellar graphite and amorphous carbon grains into diamonds. Diamond metamorphism is as important for the destruction of such grains as vaporization
A. G. G. M. Tielens   +3 more
openaire   +1 more source

Thermal Processing of Interstellar Dust Grains in the Primitive Solar Environment

open access: yesThe Astrophysical Journal, 1997
The heating and vaporization of dust grains in the protosolar environment is modeled in order to assess the survivability of interstellar solids during the formation of the solar system. A multidimensional, discrete ordinate radiative transfer code is used to compute thermal transport in the collapsing protosolar cloud.
Kenneth M. Chick, Patrick Cassen
openaire   +1 more source

Joint Modelling of Dust Scattering and Thermal Emission: The Spider Complex

open access: yesThe Astrophysical Journal, 2023
Observations across the electromagnetic spectrum of radiative processes involving interstellar dust—emission, absorption, and scattering—are used to constrain the parameters of dust models and more directly to aid in foreground removal of dust for ...
Jielai Zhang   +6 more
doaj   +1 more source

Dust in protoplanetary disks: observations*

open access: yesEPJ Web of Conferences, 2015
Solid particles, usually referred to as dust, are a crucial component of interstellar matter and of planet forming disks surrounding young stars. Despite the relatively small mass fraction of ≈1% (in the solar neighborhood of our galaxy; this number may ...
Waters L.B.F.M.
doaj   +1 more source

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