Results 11 to 20 of about 657,244 (303)
Sources of cosmic dust in the Earth's atmosphere. [PDF]
Geophys Res Lett, 2016 AbstractThere are four known sources of dust in the inner solar system: Jupiter Family comets, asteroids, Halley Type comets, and Oort Cloud comets. Here we combine the mass, velocity, and radiant distributions of these cosmic dust populations from an astronomical model with a chemical ablation model to estimate the injection rates of Na and Fe into ...
Carrillo-Sánchez JD +5 more
europepmc +7 more sources
The cosmic dust rate across the Universe [PDF]
Monthly Notices of the Royal Astronomical Society, 2017 We investigate the evolution of interstellar dust in the Universe by means of chemical evolution models of galaxies of different morphological types, reproducing the main observed features of present day galaxies. We adopt the most updated prescriptions for dust production from supernovae and asymptotic giant branch (AGB) stars as well as for dust ...
Lorenzo Gioannini +3 more
arxiv +7 more sources
On the size and velocity distribution of cosmic dust particles entering the atmosphere. [PDF]
Geophys Res Lett, 2015 The size and velocity distribution of cosmic dust particles entering the Earth's atmosphere is uncertain. Here we show that the relative concentrations of metal atoms in the upper mesosphere, and the surface accretion rate of cosmic spherules, provide ...
Carrillo-Sánchez JD +4 more
europepmc +4 more sources
Formation of Cosmic Dust Bunnies [PDF]
IEEE Transactions on Plasma Science, 2007 Planetary formation is an efficient process now thought to take place on a relatively short astronomical time scale. Recent observations have shown that the dust surrounding a protostar emits more efficiently at longer wavelengths as the protoplanetary ...
Freed, Michael S. +3 more
core +4 more sources
The impact of astrophysical dust grains on the confinement of cosmic rays [PDF]
Monthly notices of the Royal Astronomical Society, 2020 We argue that charged dust grains could significantly impact the confinement and transport of galactic cosmic rays. For sub-GeV to ~1000GeV cosmic rays, small-scale parallel Alfv\'en waves, which isotropize cosmic rays through gyro-resonant interactions, are also gyro-resonant with charged grains. If the dust is nearly stationary, as in the bulk of the
J. Squire +3 more
arxiv +3 more sources
Cosmic dust evolution: The challenges for NIKA2 [PDF]
EPJ Web of Conferences, 2022 I summarize a recent study aimed at constraining dust evolution timescales in nearby galaxies. We were able to quantify the effciency of dust condensation in SN II ejecta, grain growth in the ISM and dust destruction by SN II blast waves.
Galliano Frédéric
doaj +3 more sources
The impact of cosmic dust on supernova cosmology [PDF]
Monthly Notices of the Royal Astronomical Society, 2006 9 pages, 8 figures. Revised analysis of Balmer line decrement, references added.
Pier-Stefano Corasaniti
openalex +6 more sources
Cosmic dust fertilization of glacial prebiotic chemistry on early Earth [PDF]
Earth. Nat Astron (2024)Earth's surface is deficient in available forms of many elements considered limiting for prebiotic chemistry. In contrast, many extraterrestrial rocky objects are rich in these same elements. Limiting prebiotic ingredients may, therefore, have been delivered by exogenous material; however, the mechanisms by which exogeneous material may be reliably and
C. Walton +7 more
arxiv +3 more sources
Laboratory Analogues of Cosmic Dust [PDF]
Highlights of Astronomy, 2002 Abstract Understanding the properties and the evolution of cosmic dust requires laboratory experiments for measuring basic physical and chemical data and simulating the interaction of dust grains with their cosmic environments. We give a short review of such laboratory experiments using analogue materials of cosmic dust.
H. Mutschke +5 more
openalex +3 more sources
Synthesis and Characterization of Polypyrrole-Coated Anthracene Microparticles: A New Synthetic Mimic for Polyaromatic Hydrocarbon-Based Cosmic Dust. [PDF]
ACS Appl Mater Interfaces, 2021 Polyaromatic hydrocarbons (PAHs) are found throughout the universe. The ubiquity of these organic molecules means that they are of considerable interest in the context of cosmic dust, which typically travels at hypervelocities (>1 km s–1) within our ...
Chan DH +5 more
europepmc +2 more sources