Results 81 to 90 of about 10,194 (274)
The Influence of Galactic Cosmic Rays on Ion-Neutral Hydrocarbon Chemistry in the Upper Atmospheres of Free-Floating Exoplanets [PDF]
, 1989 Cosmic rays may be linked to the formation of volatiles necessary for prebiotic chemistry. We explore the effect of cosmic rays in a hydrogen-dominated atmosphere, as a proof-of-concept that ion-neutral chemistry may be important for modelling hydrogen ...
C. Bilger +5 more
core +3 more sources
Plasma Sources Science and Technology, 2015 In the last 40 years a wide range of molecules, including neutrals, cations and anions, containing up to 13 atoms—in addition to detections of C60 and C70 — have been found in the harsh environment of the interstellar medium. The exquisite sensitivity and very high spectral and, more recently, spatial resolution, of modern telescopes has enabled the ...
openaire +3 more sources
Ice Ic without stacking disorder by evacuating hydrogen from hydrogen hydrate
Nature Communications, 2020 Metastable cubic ice has been identified in several conditions relevant to geo and astrochemistry, but was always characterized by stacking disorder. Here the authors synthesize a hydrogen hydrate and degas hydrogen, obtaining pure non-defected cubic ice,
Kazuki Komatsu +7 more
doaj +1 more source
Spectroscopy: Aromatic astrochemistry [PDF]
Nature Reviews Chemistry, 2018 The first detection of rotational features of benzonitrile offers the opportunity to undesrtand the origin of PAHs in space.
openaire +1 more source
Mass Spectrometry Reviews, EarlyView.ABSTRACT Complex organic mixtures are found in many areas of research, such as energy, environment, health, planetology, and cultural heritage, to name but a few. However, due to their complex chemical composition, which holds an extensive potential of information at the molecular level, their molecular characterization is challenging.
Charlotte Mase +5 more
wiley +1 more source
Molecular Precursors of the RNA-World in Space: New Nitriles in the G+0.693−0.027 Molecular Cloud
Frontiers in Astronomy and Space Sciences, 2022 Nitriles play a key role as molecular precursors in prebiotic experiments based on the RNA-world scenario for the origin of life. These chemical compounds could have been partially delivered to the young Earth from extraterrestrial objects, stressing the
Víctor M. Rivilla +15 more
doaj +1 more source
Searching for O$_2$ in the SMC:Constraints on Oxygen Chemistry at Low Metallicities
, 2005 We present a 39 h integration with the Odin satellite on the ground-state 118.75 GHz line of O2 towards the region of strongest molecular emission in the Small Magellanic Cloud. Our 3sigma upper limit to the O2 integrated intensity of
A. O. H. Olofsson +36 more
core +1 more source
On the Energetics of the HCO$^+$ + C $\to$ CH$^+$ + CO Reaction and Some Astrochemical Implications [PDF]
, 2017 We explore the energetics of the titular reaction, which current astrochemical databases consider open at typical dense molecular (i.e., dark) cloud conditions.
Bhaskar, Roshan G. +3 more
core +3 more sources
Astrochemistry and Astrobiology over the last 20 years
Communications of the Byurakan Astrophysical ObservatoryA review of the achievements of astrochemistry and astrobiology over the past 20 years is given. Advances in astrochemistry in understanding the processes of emergence and survival high molecular weight chemical compounds are directly related to the ...
A. G. Yeghikyan
semanticscholar +1 more source
Solid and Gaseous Methane in IRAS 23385+6053 as Seen with Open JWST Data
The Astrophysical Journal LettersWe present a new description of the 7.7 μ m region towards the high-mass star-forming region IRAS 23385+6053 taken from the open James Webb Space Telescope Mid-Infrared Instrument Medium Resolution Spectrometer data.
Ruslan Nakibov +5 more
doaj +1 more source