Results 11 to 20 of about 37,732 (195)

Perspectives on Interstellar Dust Inside and Outside of the Heliosphere

open access: yesSpace Science Reviews, 2008
Measurements by dust detectors on interplanetary spacecraft appear to indicate a substantial flux of interstellar particles with masses exceeding 10^{-12}gram.
B. Fuchs   +24 more
core   +3 more sources

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 ...
Masashi TSUGE, Naoki WATANABE
openaire   +3 more sources

Atomistic Modeling of Methyl Formate and Glycolaldehyde Formation on Interstellar Dirty Ice Mantles via a "Radical + Ice" Mechanism. [PDF]

open access: yesChempluschem
The presence of interstellar complex organic molecules (COMs) has been baffling astrochemists for a long time. Methyl formate and glycolaldehyde are widely detected but their abundances mismatch kinetic astrochemical model predictions. Here, the formation of these two COMs is characterized onto a mixed ice surface, highlighting the importance of ...
Perrero J   +3 more
europepmc   +2 more sources

Processing of Interstellar Dust Grains in Galaxies Revealed by AKARI [PDF]

open access: yesProceedings of the International Astronomical Union, 2012
AbstractWith AKARI, we have performed a systematic study of interstellar dust grains in various environments of galaxies. In many cases, the IR emission of dust is an important tool to trace star-forming activities in galaxies. However it is much more than just star-formation tracers. AKARI has revealed the detailed properties of dust grains in regions
Hidehiro Kaneda   +8 more
openaire   +1 more source

Shock Processing of Interstellar Dust and Polycyclic Aromatic Hydrocarbons in the Supernova Remnant N132D [PDF]

open access: yesThe Astrophysical Journal, 2006
We observed the oxygen-rich Large Magellanic Cloud (LMC) supernova remnant N132D (SNR 0525-69.6), using all instruments onboard the Spitzer Space Telescope, IRS, IRAC, and MIPS (Infrared Spectrograph, Infrared Array Camera, Multiband Imaging Photometer for Spitzer). The 5-40 micron IRS spectra toward the southeastern shell of the remnant show a steeply
Tappe, A., Rho, J., Reach, W. T.
openaire   +5 more sources

Consequences of the Solar System passage through dense interstellar clouds [PDF]

open access: yesAnnales Geophysicae, 2003
Several consequences of the passage of the solar system through dense interstellar molecular clouds are discussed. These clouds, dense (more than 100 cm-3), cold (10–50 K) and extended (larger than 1 pc), are characterized by a gas-to-dust mass ...
A. G. Yeghikyan   +2 more
doaj   +1 more source

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

Experimental Phase Function and Degree of Linear Polarization of Light Scattered by Hydrogenated Amorphous Carbon Circumstellar Dust Analogs

open access: yesThe Astrophysical Journal Supplement Series, 2023
Astronomical observations of the polarized intensity of scattered visible light have revealed the presence of dust envelopes around different types of evolved stars.
Juan Carlos Gómez Martín   +10 more
doaj   +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
70 ISMS, Champaign-Urbana, Illinois, June 22-26, 2015; http://isms.illinois.edu/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-
Belén Maté   +3 more
openaire   +2 more sources

Unusual Chemical Processes in Interstellar Chemistry: Past and Present

open access: yesFrontiers in Astronomy and Space Sciences, 2021
The chemistry that occurs in interstellar clouds consists of both gas-phase processes and reactions on the surfaces of dust grains, the latter particularly on and in water-dominated ice mantles in cold clouds.
Eric Herbst, Eric Herbst
doaj   +1 more source

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