Results 21 to 30 of about 31,252 (251)

Looking for the bricks of the life in the interstellar medium: The fascinating world of astrochemistry [PDF]

open access: yesEPJ Web of Conferences, 2020
The discovery in the interstellar medium of molecules showing a certain degree of complexity, and in particular those with a prebiotic character, has attracted great interest.
Barone Vincenzo, Puzzarini Cristina
doaj   +1 more source

Catalytic Role of Refractory Interstellar Grain Analogs on H2 Formation

open access: yesFrontiers in Astronomy and Space Sciences, 2021
Refractory dust grains have an important role to play in the chemistry of star and planet-forming regions. Their surfaces interact with interstellar gas and act as a catalyst for the formation of simple and complex molecules in space.
Tushar Suhasaria, Vito Mennella
doaj   +1 more source

Interstellar chemistry [PDF]

open access: yesProceedings of the National Academy of Sciences, 2006
In the past half century, radioastronomy has changed our perception and understanding of the universe. In this issue of PNAS, the molecular chemistry directly observed within the galaxy is discussed. For the most part, the description of the molecular transformations requires specific kinetic schemes rather than chemical thermodynamics.
openaire   +3 more sources

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

Shaken or Stirred: The Diffuse Interstellar Medium with Exceptionally High SiO Abundance

open access: yesThe Astrophysical Journal, 2023
Interstellar shocks, a key element of stellar feedback processes, shape the structure of the interstellar medium (ISM) and are essential for the chemistry, thermodynamics, and kinematics of interstellar gas.
Daniel R. Rybarczyk   +2 more
doaj   +1 more source

Energy Redistribution Following CO2 Formation on Cold Amorphous Solid Water

open access: yesFrontiers in Chemistry, 2022
The formation of molecules in and on amorphous solid water (ASW) as it occurs in interstellar space releases appreciable amounts of energy that need to be dissipated to the environment.
Meenu Upadhyay, Markus Meuwly
doaj   +1 more source

Benchmark Studies on the Isomerization Enthalpies for Interstellar Molecular Species

open access: yesJournal of Nigerian Society of Physical Sciences, 2023
With the well-established correlation between the relative stabilities of isomers and their interstellar abundances coupled with the prevalence of isomeric species among the interstellar molecular species, isomerization remains a plausible formation ...
Emmanuel Etim (PhD)
doaj   +1 more source

The Role of Terahertz and Far-IR Spectroscopy in Understanding the Formation and Evolution of Interstellar Prebiotic Molecules

open access: yesFrontiers in Astronomy and Space Sciences, 2021
Stellar systems are often formed through the collapse of dense molecular clouds which, in turn, return copious amounts of atomic and molecular material to the interstellar medium.
Duncan V. Mifsud   +6 more
doaj   +1 more source

Sustained oscillations in interstellar chemistry models [PDF]

open access: hybridAstronomy & Astrophysics, 2020
Context. Nonlinear behavior in interstellar chemical models has been recognized for 25 years now. Different mechanisms account for the possibility of multiple fixed-points at steady-state, characterized by the ionization degree of the gas. Aims. Chemical oscillations are also a natural behavior of nonlinear chemical models.
Evelyne Roueff, Jacques Le Bourlot
openalex   +4 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

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