Results 91 to 100 of about 37,732 (195)
Journal of Geophysical Research: Space Physics, Volume 130, Issue 11, November 2025.Abstract Quasi‐thermal noise is measured by an electric antenna embedded in a plasma, and is routinely used to obtain a diagnostic of, for example, the plasma density and electron temperature. Its applications have been so far to a large extent aimed at the analysis of unmagnetized plasmas, for which the plasma‐electron cyclotron frequencies ratio is ...
P. Dazzi +3 more
wiley +1 more source
Nanodust in the Interstellar Medium in Comparison to the Solar System
, 2012 Nanodust, which undergoes stochastic heating by single starlight photons in the interstellar medium, ranges from angstrom-sized large molecules containing tens to thousands of atoms (e.g.
Li, Aigen, Mann, Ingrid
core +1 more source
Physicochemical Constraints on the Abiotic Polymerization of Nucleotides Into RNA
Journal of Geophysical Research: Biogeosciences, Volume 130, Issue 11, November 2025.Abstract One of the key steps in the origin of life is the polymerization of nucleotides into nucleic acids like RNA. We have quantified the energetic impact of temperature, pressure, and composition on the polymerization of nucleotides into RNA using the Gibbs function. These Gibbs energies have been used to calculate the probability that a nucleotide
D. E. LaRowe, J. M. Dick
wiley +1 more source
Trapped Water on Silicates in the Laboratory and in Astrophysical Environments
The Astrophysical JournalThe existence of strongly bound water molecules on silicate surfaces, above the desorption temperature of water ice, was first predicted by computational studies and has recently been demonstrated by laboratory experiments.
Alexey Potapov +3 more
doaj +1 more source
Rotational Disruption of Astrophysical Dust and Ice—Theory and Applications
Galaxies, 2020 Dust is an essential component of the interstellar medium (ISM) and plays an important role in many different astrophysical processes and phenomena.
Thiem Hoang
doaj +1 more source
Physical-chemical processes in a protoplanetary cloud [PDF]
Physical-chemical processes in a protoplanetary cloud are discussed. The following subject areas are covered: (1) characteristics of the chemical composition of molecular interstellar clouds; (2) properties and physico-chemical process in the genesis of ...
Lavrukhina, Avgusta K.
core +1 more source
On the Formation of CO2 and Other Interstellar Ices
, 2011 We investigate the formation and evolution of interstellar dust-grain ices under dark-cloud conditions, with a particular emphasis on CO2. We use a three-phase model (gas/surface/mantle) to simulate the coupled gas--grain chemistry, allowing the ...
Garrod, Robin T., Pauly, Tyler
core +1 more source
Mass-loss and silicate production in oxygen-rich AGB stars: current understanding and open questions
Frontiers in Astronomy and Space SciencesAGB stars play a crucial role in the chemical enrichment of the Universe, polluting their host galaxies with gas and dust that reflect the nucleosynthesis processes active during their evolution.
Ester Marini, Silvia Tosi, Silvia Tosi
doaj +1 more source
Charging of Aggregate Grains in Astrophysical Environments
, 2013 The charging of dust grains in astrophysical environments has been investigated with the assumption these grains are homogeneous spheres. However, there is evidence which suggests many grains in astrophysical environments are irregularly-shaped ...
Hyde, Truell +3 more
core +1 more source
Studying the spatial distribution of interstellar dust [PDF]
The spacial distribution of interstellar dust reflects both interstellar dynamics and the processes which form and destroy dust in the interstellar medium (ISM).
Allen, C. +6 more
core +1 more source