Results 31 to 40 of about 668,448 (162)
The H2 Glow of a Quiescent Molecular Cloud Observed with JWST
The Astrophysical Journal LettersWe report JWST MIRI/MRS observations of the H _2 S (1) 17.04 μ m transition in two regions in the boundary of the Taurus molecular cloud. The two regions, denoted “Edge” (near the relatively sharp boundary of the ^13 CO J = 1 → 0 emission) and “Peak ...
Paul F. Goldsmith +8 more
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The chemistry of phosphorus in dense interstellar clouds
The Astrophysical Journal, 1984 Laboratory experiments show that the ion-molecule chemistry of phosphorus is significantly different from that of nitrogen in dense interstellar clouds. The PH3 molecule is not readily formed by gas-phase, ion-molecule reactions in these regions. Laboratory results used in a simple kinetic model indicate that the most abundant molecule containing ...
L. R. Thorne +3 more
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Novel algorithms for the understanding of the chemical cosmos [PDF]
, 2015 Molecular data from the interstellar medium (ISM) contain information that holds the key to understanding our chemically controlled cosmos and to unlocking the secrets of our universe.
Makrymallis, A
core
Proton and Electron Irradiations of CH4:H2O Mixed Ices
Atoms, 2023 The organic chemistry occurring in interstellar environments may lead to the production of complex molecules that are relevant to the emergence of life. Therefore, in order to understand the origins of life itself, it is necessary to probe the chemistry ...
Duncan V. Mifsud +9 more
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Deuterium fractionation in dense interstellar clouds
The Astrophysical Journal, 1989 The time-dependent gas-phase chemistry of deuterium fractionation in dense interstellar clouds ranging in temperature between 10 and 70 K was investigated using a pseudo-time-dependent model similar to that of Brown and Rice (1986). The present approach, however, considers much more complex species, uses more deuterium fractionation reactions, and ...
Millar, TJ, Bennett, A., Herbst, E.
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International Journal of Chemical Kinetics, Volume 58, Issue 12, Page 1136-1145, December 2026.ABSTRACT We present chemical kinetic rate constants for the cis to trans isomerisation or rotamerization of monomeric seleno‐, thio‐, and formic acids and that of three of their dimeric species, based on variational transition state theory and multidimensional tunneling calculations in the gas‐phase, from 10 K to 300 K. These provide, firstly, reliable
Judith Wurmel, John M. Simmie
wiley +1 more source
The formation of molecular hydrogen in the interstellar medium [PDF]
, 2010 H2 is the most abundant molecule in the interstellar medium and forms on the surface of interstellar dust grains. Laboratory studies have been conducted of HD formation on a dust grain analogue, which is a highly-oriented pyrolytic graphite surface ...
Islam, F.
core
Modelling the spinning dust emission from dense interstellar clouds
, 2011 International audienceContext. Electric dipole emission arising from rapidly rotating polycyclic aromatic hydrocarbons (PAHs) is often invoked to explain the anomalous microwave emission.
Verstraete, L. +5 more
core +1 more source
Tracing the Layers of Photodissociated Gas in the Trifid Nebula
The Astrophysical JournalPhotodissociated gas bears the signature of the dynamical evolution of the ambient interstellar medium impacted by the mechanical and radiative feedback from an expanding H ii region.
Bhaswati Mookerjea, Göran Sandell
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The kinetic chemistry of dense interstellar clouds
The Astrophysical Journal Supplement Series, 1982 A model of the time-dependent chemistry of dense interstellar clouds is formulated to study the dominant chemical processes in carbon and oxygen isotope fractionation, the formation of nitrogen-containing molecules, and the evolution of product molecules as a function of cloud density and temperature.
T. E. Graedel +2 more
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