Results 1 to 10 of about 2,145,468 (291)

Probing non polar interstellar molecules through their protonated form: Detection of protonated cyanogen (NCCNH<sup>+</sup>). [PDF]

open access: bronzeAstron Astrophys, 2015
Cyanogen (NCCN) is the simplest member of the series of dicyanopolyynes. It has been hypothesized that this family of molecules can be important constituents of interstellar and circumstellar media, although the lack of a permanent electric dipole moment
Agúndez M   +21 more
europepmc   +5 more sources

2021 Census of Interstellar, Circumstellar, Extragalactic, Protoplanetary Disk, and Exoplanetary Molecules [PDF]

open access: goldAstrophysical Journal Supplement Series, 2022
To date, 241 individual molecular species, composed of 19 different elements, have been detected in the interstellar and circumstellar medium by astronomical observations.
Brett A. McGuire
openalex   +2 more sources

Organic Molecules in Interstellar Space: Latest Advances [PDF]

open access: yesFrontiers in Astronomy and Space Sciences, 2022
Although first considered as too diluted for the formation of molecules in-situ and too harsh an environment for their survival, the interstellar medium has turned out to host a rich palette of molecular species: to date, 256 species, not counting ...
Michel Guélin, Jose Cernicharo
doaj   +2 more sources

Observational astrochemistry: The quest for interstellar molecules [PDF]

open access: diamondEPJ Web of Conferences, 2012
Over 160 molecular species, not counting isotopologues, have been identified in circumstellar envelopes and interstellar clouds. These species have revealed a wealth of familiar, as much as exotic molecules and in complex organic (and silicon) compounds,
Guélin M.
doaj   +2 more sources

Synthetic Approaches to Complex Organic Molecules in the Cold Interstellar Medium

open access: yesFrontiers in Astronomy and Space Sciences, 2022
The observation and synthesis of organic molecules in interstellar space is one of the most exciting and rapidly growing topics in astrochemistry.
Eric Herbst   +3 more
doaj   +2 more sources

Formation of Complex Organic Molecules in Cold Interstellar Environments through Nondiffusive Grain-surface and Ice-mantle Chemistry [PDF]

open access: bronzeAstrophysical Journal Supplement Series, 2020
A prevailing theory for the interstellar production of complex organic molecules (COMs) involves formation on warm dust-grain surfaces, via the diffusion and reaction of radicals produced through grain-surface photodissociation of stable molecules ...
Miwha Jin, Robin T. Garrod
openalex   +3 more sources

The chemistry of interstellar molecules containing the halogen elements [PDF]

open access: yes, 2009
Although they are only minor constituents of the interstellar medium, halogen-containing molecules are of special interest because of their unique thermochemistry. Here, we present a theoretical study of the chemistry of interstellar molecules containing
Neufeld, David A., Wolfire, Mark G.
core   +3 more sources

Non-equilibrium processes in interstellar molecules [PDF]

open access: green, 1979
The types of nonequilibrium emission and absorption by interstellar molecules are summarized. The observed brightness emission temperatures of compact OH and H2O sources are discussed using the concept of maser amplification.
Strelnitskiy, V. S.
core   +2 more sources

Considerations Regarding Interstellar Molecules [PDF]

open access: greenThe Astrophysical Journal, 1937
An attempt has been made to compute the numbers of certain molecules in interstellar space. The results obtained are unfavorable to Saha's identification of one of Merrill's interstellar lines with Na2. A search for the bands of CH, OH, NH, CN, and C2 would appear to be promising.
Swings, Polydore, Rosenfeld, L.
openaire   +3 more sources

Surface formation routes of interstellar molecules: hydrogenation reactions in simple ices [PDF]

open access: hybrid, 2011
It has been a long standing problem in astrochemistry to explain how molecules can form in a highly dilute environment such as the interstellar medium. In recent years it has become clear that not only ion/radical-molecule gas-phase reactions, but also ...
S. Ioppolo, H. M. Cuppen, H. Linnartz
openalex   +2 more sources

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