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The recent discovery of terrestrial-type organic species such as methyl formate and dimethyl ether in the cold interstellar gas has proved that the formation of organic matter in the Galaxy begins at a much earlier stage of star formation…

Astrophysics of Galaxies · Physics 2015-06-15 A. I. Vasyunin , Eric Herbst

The optical filaments found in many cooling flows in galaxy clusters consist of low density ($\sim 10^3 \pcc$) cool ($\sim 10^3$ K) gas surrounded by significant amounts of cosmic-ray and magnetic-field energy. Their spectra show…

The self-organized pattern (SOP) phenomenon is prevalent in plasma, while knowledge about SOP discharge affecting reactive species generated plasma-activated media (PAM) for cancer therapy is poorly documented. The aim of this study focused…

Biological Physics · Physics 2021-11-04 Zhitong Chen

Context. The recent detection of warm H$_2$O vapor emission from the outflows of carbon-rich asymptotic giant branch (AGB) stars challenges the current understanding of circumstellar chemistry. Two mechanisms have been invoked to explain…

Many theoretical and laboratory studies predict H2 to be formed in highly excited ro-vibrational states. The consequent relaxation of excited levels via a cascade of infrared transitions might be observable in emission from suitable…

Astrophysics of Galaxies · Physics 2015-05-20 Farahjabeen Islam , Cesare Cecchi-Pestellini , Serena Viti , Silvia Casu

The potential of using hydrogen as a sustainable energy carrier is attributed to its high energy density and its utilization without CO$_2$ emissions. Existing technologies mainly produce hydrogen thermochemically via natural gas reforming…

Plasma Physics · Physics 2025-05-06 Benard Tabu

Radiative cooling by molecules is a crucial process for hydrodynamic escape, as it can efficiently remove the thermal energy driving the outflow, acquired through X-ray and extreme UV absorption. Carbon oxides, such as CO and CO2, and their…

Earth and Planetary Astrophysics · Physics 2024-11-26 Tatsuya Yoshida , Naoki Terada , Kiyoshi Kuramoto

A strongly coupled ultracold plasma can be used as an excellent test platform for studying many-body interactions associated with various plasma phenomena. In this paper we discuss an approach that makes possible creation of the…

The study of the formation of molecular hydrogen on low temperature surfaces is of interest both because it allows to explore elementary steps in the heterogeneous catalysis of a simple molecule and because of the applications in…

Chemical Physics · Physics 2008-11-21 G. Vidali , V. Pirronello , L. Li , J. Roser , G. Manico , R. Mehl , A. Lederhendler , H. B. Perets , J. R. Brucato , O. Biham

A generation mechanism of super Alfv\'{e}nic (SPA) waves in multi-ion species plasma is proposed and the associated heavy ion acceleration process is discussed. The SPA waves are thought to play important roles in particle acceleration…

Space Physics · Physics 2020-01-09 S. Matsukiyo , T. Akamizu , T. Hada

An understanding of the CO$_2$ + H$_2$O hydration reaction is crucial for modeling the effects of ocean acidification, for enabling novel carbon storage solutions, and as a model process in the geosciences. While the mechanism of this…

Chemical Physics · Physics 2025-07-08 Samuel G. H. Brookes , Venkat Kapil , Angelos Michaelides , Christoph Schran

Formation of molecular H2 and O2 is experimentally studied under laser exposure of water colloidal solution to radiation of a Nd:YAG laser at pulse duration of 10 ns and laser fluence in the liquid of order of 100 J/cm2. It is found the…

General Physics · Physics 2017-05-24 E. V. Barmina , A. V. Simakin , G. A. Shafeev

CO2 has been detected in both the tenuous exosphere and surface chaos regions of Europa, but it is still unclear whether this CO2 is generated in situ by radiolysis or whether it is directly delivered by the ocean. In this work, we study…

Earth and Planetary Astrophysics · Physics 2025-02-07 Sankhabrata Chandra , Bryana L. Henderson , Murthy S. Gudipati

After the recombination of Hydrogen, primordial molecules such as H_2, $HD$ can be formed.The formation of structures in the post-recombination gaseous medium is commonly explained by primordial density fluctuations. In a self-gravitating…

Astrophysics · Physics 2007-05-23 D. Puy , M. Signore

We produce cold and dense clouds of atomic ions (Ca$^+$, Dy$^+$) by laser ablation of metal targets and cryogenic buffer gas cooling of the resulting plasma. We measure the temperature and density of the ion clouds using laser absorption…

Atomic Physics · Physics 2019-07-04 Nishant Bhatt , Kosuke Kato , Amar C. Vutha

H2 formation is an important process in post-shock regions, since H2 is an active participant in the cooling and shielding of the environment. The onset of H2 formation therefore has a strong effect on the temperature and chemical evolution…

Solar and Stellar Astrophysics · Physics 2015-05-18 H. M. Cuppen , L. E. Kristensen , E. Gavardi

(Abridged). In this paper, we present results from a large set of numerical simulations that demonstrate that H2 formation occurs rapidly in turbulent gas. Starting with purely atomic hydrogen, large quantities of molecular hydrogen can be…

Astrophysics · Physics 2008-11-26 S. C. O. Glover , M. -M. Mac Low

A combination of experiments and extensive modelling, including a chemical kinetics analysis, was performed for a CO$_2$/H$_2$O plasma in a dielectric barrier discharge. This provides a better understanding of the mechanisms related to the…

Chemical Physics · Physics 2016-06-15 Ramses Snoeckx , Alp Ozkan , Robby Aerts , Thierry Dufour , François Reniers , Annemie Bogaerts

New and archival interferometric 12CO(1->0) datasets from six nearby galaxies are combined with H_2 2.122um and H-alpha maps to explore in detail the interstellar medium in different star-forming galaxies. We investigate the relation…

We report on the detection of a rich water reservoir in the protostellar envelope of the Class 0 source HH211. In striking contrast to all other molecules detected with Herschel/PACS, water emission peaks around the central source where…

Solar and Stellar Astrophysics · Physics 2020-07-01 Odysseas Dionatos
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