Results 51 to 60 of about 1,176,456 (219)
Gas-phase Chemistry in the Interstellar Medium: The Role of Laboratory Astrochemistry
Frontiers in Astronomy and Space Sciences, 2022 “Who” and how? In this simple question the complexity of the interstellar chemistry is encapsulated. “Who” refers to what molecules are present in the interstellar medium (ISM) and “how” to the mechanisms that led to their formation.
Cristina Puzzarini
doaj +1 more source
LiH molecules in dense interstellar clouds [PDF]
, 1986 Оценены содержания молекул LiH в межзвездных облаках. Рассчитаны температуры возбуждения вращательных уровней и ожидаемые потоки излучения, соответствующие вращательным переходам.
Вайнер, Б.В. +2 more
core +2 more sources
A Framework for Incorporating Binding Energy Distribution in Gas-ice Astrochemical Models
The Astrophysical JournalOne of the most serious limitations of current astrochemical models with the rate equation (RE) approach is that only a single type of binding site is considered in grain surface chemistry, although laboratory and quantum chemical studies have found that
Kenji Furuya
doaj +1 more source
Clathrate hydrate crystallization
The Canadian Journal of Chemical Engineering, Volume 104, Issue 11, Page 5931-5953, November 2026.Abstract Clathrate hydrate crystallization has been an area of interest to chemical engineers from the point of view of crystal structure, thermophysical properties, phase equilibria, kinetics, industrial applications, and environmental (climate change) implications.
Peter Englezos
wiley +1 more source
The Astrophysical JournalIce chemistry in the dense, cold interstellar medium (ISM) is probably responsible for the formation of interstellar complex organic molecules (COMs). Recent laboratory experiments performed at T ∼ 4 K have shown that irradiation of CO:N _2 ice samples ...
Rafael Martín-Doménech +3 more
doaj +1 more source
A Possible Chemical Clock in High-mass Star-forming Regions: N(HC3N)/N(N2H+)?
The Astrophysical Journal Supplement Series, 2023 We conducted observations of multiple HC _3 N ( J = 10−9, 12−11, and 16−15) lines and the N _2 H ^+ ( J = 1−0) line toward a large sample of 61 ultracompact (UC) H ii regions, through the Institut de Radioastronomie Millmétrique 30 m and the Arizona ...
Y. X. Wang +7 more
doaj +1 more source
The formation of interstellar diatomic molecules [PDF]
, 1972 Reactions between atoms and ions of the interstellar medium and vibrationally excited molecular hydrogen are shown to produce a specific set of molecules.
Williams, D. A., Stecher, T. P.
core
Frontiers 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
Optical Radiation Pressure: Resonant Mechanical Excitation of Thin Films
Annalen der Physik, Volume 538, Issue 10, October 2026.The modulation of a laser beam generates a modulated radiation pressure force acting on a thin film. A resonant response is observed, leading to a net average thinning of the film. ABSTRACT Optical radiation pressure was directly observed for the first time more than a century ago.
Janine Emile, Olivier Emile
wiley +1 more source
ChemistryEurope, Volume 4, Issue 10, October 2026.Quantum chemistry calculations show that the reaction between oxygen radical anion and methyl iodide leads to multiple products, where their competition is affected by microhydration. The SN2 and oxygen insertion products can interconvert at the post–reaction complex well, further complicating the reaction.
Xulin Gong, Xiangyu Wu, Jing Xie
wiley +1 more source