Results 91 to 100 of about 10,661 (258)

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

Lack of PAH emission toward low-mass embedded young stellar objects [PDF]

, 2008
PAHs have been detected toward molecular clouds and some young stars with disks, but have not yet been associated with embedded young stars. We present a sensitive mid-IR spectroscopic survey of PAH features toward a sample of low-mass embedded YSOs. The
A. Crapsi, Acke, Allamandola, Arce, Basri, Bernstein, Bernstein, Boogert, C. P. Dullemond, Calvet, Chiang, Crapsi, Draine, Dullemond, Dullemond, E. F. van Dishoeck, Ehrenfreund, Evans, F. Lahuis, G. A. Blake, Geers, Geers, Geers, Gudipati, Habart, Habart, Hartmann, Helling, Hogerheijde, Jonkheid, Jørgensen, K. M. Pontoppidan, Kraus, Lahuis, Luhman, Manske, Mattioda, Peeters, Pontoppidan, Pontoppidan, Pontoppidan, Ressler, Siebenmorgen, Terada, Thi, Ulrich, V. C. Geers, van Dishoeck, van Dishoeck, Van Kerckhoven, Verstraete, Visser, Weingartner, Whitney   +53 more
core   +2 more sources

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

Neutrals Ejected From Io's Plasma/Atmosphere Interaction Region by Physical Chemistry Processes

Journal of Geophysical Research: Space Physics, Volume 130, Issue 8, August 2025.
Abstract Neutrals ejected from Io's atmosphere are the source of many important structures of the jovian magnetosphere: they feed giant neutral clouds, which extend along Io's orbit and nebulae, which extend beyond 500 jovian radii. The neutral loss rate is casually claimed to be ∼1 ton/s, but the processes leading to this loss, their quantitative ...
V. Dols
wiley   +1 more source

Future Directions in Astrochemistry [PDF]

Proceedings of the International Astronomical Union, 2005
An account of a free-ranging Panel Discussion held during the Symposium.
openaire   +2 more sources

The UMIST database for astrochemistry 2012 [PDF]

Astronomy & Astrophysics, 2013
We present the fifth release of the UMIST Database for Astrochemistry (UDfA). The new reaction network contains 6173 gas-phase reactions, involving 467 species, 47 of which are new to this release. We have updated rate coefficients across all reaction types. We have included 1171 new anion reactions and updated and reviewed all photorates.
A. J. Markwick, Martin A. Cordiner, Martin A. Cordiner, Catherine Walsh, K. W. Smith, Tom J. Millar, D. McElroy   +6 more
openaire   +7 more sources

Redefining proton affinity for heteronuclear molecular species: quantum chemical insights

Discover Chemistry
One of the main problems with experimental methods for detecting proton affinity (PA) is that they cannot perform site-specific protonation. For heteronuclear molecular species that have two or more protonation sites, the experimental PA measurement only
E. E. Etim, J. P. Shinggu, H. S. Samuel, B. Bako, D. K. Sahoo, L. Mweene, S. Kaya   +6 more
doaj   +1 more source

Mapping adsorption on ionic surfaces via a pairwise potential‐based high‐throughput approach

Journal of Applied Crystallography, Volume 58, Issue 4, Page 1462-1468, August 2025.
This work presents a high‐throughput method for predicting molecular adsorption sites on ionic surfaces using pairwise Coulomb and Lennard–Jones potentials. Requiring only a CIF as input, the approach enables rapid identification of stable adsorption structures, offering an efficient pathway for studying complex surface–adsorbate interactions ...
Eric Mates-Torres, Piero Ugliengo, Albert Rimola   +2 more
wiley   +1 more source

Efficient calculation of van der Waals dispersion coefficients with time-dependent density functional theory in real time: application to polycyclic aromatic hydrocarbons

, 2007
The van der Waals dispersion coefficients of a set of polycyclic aromatic hydrocarbons, ranging in size from the single-cycle benzene to circumovalene (C66H20), are calculated with a real-time propagation approach to time-dependent density functional ...
Alberto Castro, Flower D. R., Giacomo Mulas, Giuliano Malloci, London F., Mahanty J., Miguel A. L. Marques, Parsegian V. A., Siegel G. J., Silvana Botti   +9 more
core   +3 more sources

Molecular Astrophysics & Astrochemistry

, 2019
Many of the facilities and missions that Canada is or will be involved in as well as the diverse science programs that drive these missions rely on the astronomical detection and characterization of atomic and molecular gas as well as dust grains across the electromagnetic spectrum.
Cami, Jan, Peeters, Els, Houde, Martin, Mandy, Margot, Plume, Rene, Johnstone, Doug, van der Marel, Nienke, Sadavoy, Sarah, Hill, Alex   +8 more
openaire   +3 more sources