Results 21 to 30 of about 11,084 (265)

Systems Astrochemistry: A New Doctrine for Experimental Studies

open access: yesFrontiers in Astronomy and Space Sciences, 2021
Laboratory experiments play a key role in deciphering the chemistry of the interstellar medium (ISM) and the formation of complex organic molecules (COMs) relevant to life.
Nigel J. Mason   +4 more
doaj   +1 more source

Cold CAS ion trap – 22 pole trap with ring electrodes for astrochemistry [PDF]

open access: yes, 2023
The enhancement of a cryogenic radio frequency 22 pole trap instrument by the addition of ring electrodes is presented in detail. The ring electrodes tightly surround the poles and only a fraction of the applied electric potential penetrates to the trap ...
P. Jusko   +2 more
semanticscholar   +1 more source

A statistical and machine learning approach to the study of astrochemistry. [PDF]

open access: yesFaraday discussions, 2023
In order to obtain a good understanding of astrochemistry, it is crucial to better understand the key parameters that govern grain-surface chemistry. For many chemical networks, these crucial parameters are the binding energies of the species.
Johannes Heyl, S. Viti, G. Vermariën
semanticscholar   +1 more source

Concluding remarks: Faraday Discussion on astrochemistry at high resolution. [PDF]

open access: yesFaraday discussions, 2023
Fifty years on from the first detailed chemical kinetic modelling of astronomical sources, I provide some introductory comments on the history of astrochemistry, summarise some personal views on the topics covered in this discussion meeting, and conclude
T. Millar
semanticscholar   +1 more source

Geochemistry of the cretaceous-tertiary transition boundary at Blake Nose (N. W. Atlantic): Cosmogenic Ni [PDF]

open access: yesJournal of the Serbian Chemical Society, 2004
The Cretaceous-Tertiary (KT) boundary transition at the Blake Nose Plateau recovered by ODP Leg 171B (site 1049, hole A, core 17X, section 2) contains an ejecta bed (thickness ca. 17 cm) marking a late Cretaceous asteroid impact.
Premović Pavle I.   +3 more
doaj   +1 more source

Astrochemistry During the Formation of Stars [PDF]

open access: yesAnnual Review of Astronomy and Astrophysics, 2020
Star-forming regions show a rich and varied chemistry, including the presence of complex organic molecules—in both the cold gas distributed on large scales and the hot regions close to young stars where protoplanetary disks arise.
J. Jørgensen, A. Belloche, R. Garrod
semanticscholar   +1 more source

LIDA: The Leiden Ice Database for Astrochemistry [PDF]

open access: yesAstronomy & Astrophysics, 2022
High quality vibrational spectra of solid-phase molecules in ice mixtures and for temperatures of astrophysical relevance are needed to interpret infrared observations toward protostars and background stars.
W. Rocha   +5 more
semanticscholar   +1 more source

Infrared Spectra and Vapor Pressures of Crystalline C2N2, with Comparisons to Crystalline HCN

open access: yesThe Planetary Science Journal, 2023
In a continuation of our work on nitriles, we have examined cyanogen (C _2 N _2 ) as a crystalline solid, comparing the results to our recent work on crystalline hydrogen cyanide (HCN).
Reggie L. Hudson, Perry A. Gerakines
doaj   +1 more source

Gas-phase Ortho-to-para Ratio of Formaldehyde Formed at Low Temperatures in Laboratory Ices

open access: yesThe Astrophysical Journal Letters, 2023
The ortho-to-para ratio (OPR) of formaldehyde (H _2 CO) has been used as a probe to estimate the formation temperature of molecules in interstellar, circumstellar, and cometary environments, relying on the assumption that nuclear spin conversion is ...
K. M. Yocum   +4 more
doaj   +1 more source

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