Results 31 to 40 of about 366,998 (235)

Interstellar Dust in the LMC [PDF]

open access: yesSymposium - International Astronomical Union, 1984
New IUE observations confirm the differences between the Galactic and LMC ultraviolet extinction curves and show some evidence for variations within the LMC. Visual and infrared photometry and polarimetry show that the anomalous properties of the LMC dust do not extend to longer wavelengths.
Peter G. Martin, Geoffrey C. Clayton
openaire   +3 more sources

IAS/CEA Evolution of Dust in Nearby Galaxies (ICED): The spatially-resolved dust properties of NGC4254 [PDF]

open access: yesEPJ Web of Conferences
We present the first preliminary results of the project ICED, focusing on the face-on galaxy NGC4254. We use the millimetre maps observed with NIKA2 at lRAM-30m. as part of the IMEGIN Guaranteed Time Large Program.
Pantoni L.   +59 more
doaj   +1 more source

Chemical Kinetics Simulations of Ice Chemistry on Porous Versus Non-Porous Dust Grains

open access: yesFrontiers in Astronomy and Space Sciences, 2021
The degree of porosity in interstellar dust-grain material is poorly defined, although recent work has suggested that the grains could be highly porous.
Drew A. Christianson   +2 more
doaj   +1 more source

Interstellar Dust in the Solar System [PDF]

open access: yesSpace Science Reviews, 2007
8 pages, 4 figures.
Markus Landgraf   +3 more
openaire   +4 more sources

INDUCING INTRINSIC γ-RAY EMISSION OF THE INTERSTELLAR MEDIUM BY INTENSE FLUXES OF PROTONS AND α-PARTICLES IN ACTIVE GALACTIC NUCLEI

open access: yesOdessa Astronomical Publications, 2020
Cosmic-ray induced γ-ray emission in active galactic nuclei (AGN) has been examined in this study for the first time. Cross-sections for the formation of γ-quanta in such cosmic-ray collisions were selected in the 1-150 MeV energy range.
D. N. Doikov
doaj   +1 more source

Aliphatic hydrocarbon content of interstellar dust [PDF]

open access: yesProceedings of the International Astronomical Union, 2018
The mid-IR spectrum of the interstellar medium contains both aromatic and aliphatic hydrocarbon features. These are generally attributed to carbonaceous dust.
B. Günay   +8 more
semanticscholar   +1 more source

The formation of peptide-like molecules on interstellar dust grains [PDF]

open access: yesMonthly notices of the Royal Astronomical Society, 2018
Molecules with an amide functional group resemble peptide bonds, the molecular bridges that connect amino acids, and may thus be relevant in processes that lead to the formation of life.
N. Ligterink   +6 more
semanticscholar   +1 more source

Interstellar dust in galaxies [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 1990
Current ideas about the nature of interstellar dust in galaxies are reviewed, with a strong emphasis on the nature of the very small grain component needed to explain the mid-infrared diffuse emission and unidentified infrared features. Models for the infrared spectra of galaxies are reviewed and the evidence that most of the radiation in star-forming ...
openaire   +2 more sources

One Relation for All Wavelengths: The Far-ultraviolet to Mid-infrared Milky Way Spectroscopic R(V)-dependent Dust Extinction Relationship

open access: yesThe Astrophysical Journal, 2023
Dust extinction is one of the fundamental measurements of dust grain sizes, compositions, and shapes. Most of the wavelength-dependent variations seen in Milky Way extinction are strongly correlated with the single parameter R ( V ) = A ( V )/ E ( B − V )
Karl D. Gordon   +6 more
doaj   +1 more source

dustmaps: A Python interface for maps of interstellar dust

open access: yesJournal of Open Source Software, 2018
The dustmaps package provides a uniform Python interface for several commonly used maps of interstellar dust, including two-dimensional maps such as Schlegel, Finkbeiner, and Davis (1998), Planck Collaboration et al.
G. Green
semanticscholar   +1 more source

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