Results 71 to 80 of about 2,623 (182)

Regarding the Detection of Interstellar C4 and C5 Molecules

The Astrophysical Journal
Analysis of very high signal-to-noise ratio (S/N) spectra of reddened stars allowed us to determine an upper limit (UL) of the column density N (C _4 ).
G. A. Galazutdinov, E. I. Kazanina, J. Krełowski   +2 more
doaj   +1 more source

Interstellar Molecules in Meteorites [PDF]

Symposium - International Astronomical Union, 1989
Substantial enrichment of deuterium, D, in certain components of chondritic meteorites is interpreted as a record of isotopic fractionation during ion-molecule reactions at the very low temperatures characteristic of dense interstellar clouds. Whether those meteorites still contain the actual molecules that were synthesised in the presolar interstellar
openaire   +1 more source

Formation of All Three C2H4O Isomers—Ethylene Oxide (c-C2H4O), Acetaldehyde (CH3CHO), and Vinyl Alcohol (CH2CHOH)—in Ethanol-containing Interstellar Analog Ices

The Astrophysical Journal
Oxygen-containing complex organic molecules are key precursors to biorelevant compounds fundamental for the origins of life. However, the untangling of their interstellar formation mechanisms has just scratched the surface, especially for oxygen ...
Jia Wang, Chaojiang Zhang, Joshua H. Marks, Ralf I. Kaiser   +3 more
doaj   +1 more source

Infrared Spectra of Solid HCN Embedded in Various Molecular Environments for Comparison with the Data Obtained with JWST

The Astrophysical Journal Letters
Hydrogen cyanide (HCN) molecules serve as an important tracer for the chemical evolution of elemental nitrogen in the regions of star and planet formation.
Maksim Ozhiganov, Mikhail Medvedev, Varvara Karteyeva, Ruslan Nakibov, Uliana Sapunova, Vadim Krushinsky, Ksenia Stepanova, Anastasia Tryastsina, Aleksandr Gorkovenko, Gleb Fedoseev, Anton Vasyunin   +10 more
doaj   +1 more source

Binding Energies of Interstellar Complex Organic Molecules on Water Ice Surfaces: A Quantum Chemical Investigation

The Astrophysical Journal
Interstellar dust grains are enveloped by ices of frozen molecules in cold, dense regions of the interstellar medium (ISM), which are also observed in the gas phase. Whether a species is in the solid or gaseous state is governed by its binding energy (BE)
Harjasnoor Kakkar, Berta Martínez-Bachs, Cecilia Ceccarelli, Piero Ugliengo, Albert Rimola   +4 more
doaj   +1 more source

Fingerprinting fragments of fragile interstellar molecules: dissociation chemistry of pyridine and benzonitrile revealed by infrared spectroscopy and theory.

Faraday Discuss, 2023
Rap DB, Simon A, Steenbakkers K, Schrauwen JGM, Redlich B, Brünken S.   +5 more
europepmc   +1 more source

Spectroscopic Identification and Photochemistry of Astrochemically Relevant Phosphorus-bearing Molecules [O, C, N, P] and [2O, C, N, P]

The Astrophysical Journal
Diatomic molecules phosphorus monoxide (PO) and phosphorus mononitride (PN) are the main reservoirs of gas-phase phosphorus in interstellar and circumstellar environments, indicating the possibility of forming new phosphorus-bearing molecules through ...
Bifeng Zhu, Minghao Wang, Junjie Jiang, Ningjing Jiang, Jingling Hong, Guntram Rauhut, Guanjun Wang, Weixing Li, Xiaoqing Zeng   +8 more
doaj   +1 more source

Interstellar Dust-catalyzed Hydrogen Formation Enabled by Nuclear Quantum Effects

The Astrophysical Journal
Molecular hydrogen (H _2 ) is one of the key chemical species that controls and shapes a wide spectrum of astrophysical processes from galaxy evolution to planet formation. Although catalyzation on dust grain surfaces is the dominant formation channel of
Xiaolong Yang, Lile Wang, Di Li, Shenzhen Xu   +3 more
doaj   +1 more source

Interstellar Molecules and Chemistry [PDF]

Science, 1970
openaire   +2 more sources

On the Origin of Infrared Bands Attributed to Tryptophan in Spitzer Observations of IC 348

The Astrophysical Journal Letters
Infrared emission features toward interstellar gas of the IC 348 star cluster in Perseus have been recently proposed to originate from the amino acid tryptophan.
Aditya Dhariwal, Thomas H. Speak, Linshan Zeng, Amirhossein Rashidi, Brendan Moore, Olivier Berné, Anthony J. Remijan, Ilane Schroetter, Brett A. McGuire, Víctor M. Rivilla, Arnaud Belloche, Jes K. Jørgensen, Pavle Djuricanin, Takamasa Momose, Ilsa R. Cooke   +14 more
doaj   +1 more source