Results 31 to 40 of about 9,110 (204)

Identification of solid N2O in interstellar ices using open JWST data

Astronomy & Astrophysics
Context. Only six molecules containing an N-O bond are detected in the gaseous phase of the interstellar medium. One of them is nitrous oxide (N2O), which was unsuccessfully searched for in solid form since the launch of the Infrared Space Observatory ...
Karteyeva V., Nakibov R., Petrashkevich I., Medvedev M., Vasyunin A.   +4 more
doaj   +1 more source

Astrochemistry and Astrophotonics for an Antarctic Observatory

, 2009
Due to its location and climate, Antarctica offers unique conditions for long-period observations across a broad wavelength regime, where important diagnostic lines for molecules and ions can be found, that are essential to understand the chemical ...
A. Kelz, Beitz, Bland-Hawthorn, Bland-Hawthorn, Bland-Hawthorn, Ehrenfreund, Fulara, H.-G. Löhmannsröben, Kelz, Lawrence, M. Kumke, M.M. Roth, Maier, Mandon, Murphy, Noordegraaf, Snow, Thomson   +17 more
core   +1 more source

Infrared spectra of methane-containing ice mixtures for JWST data analyses

Astronomy & Astrophysics
Context. Solid methane (CH4) is an important molecule in interstellar and planetary environments, serving as a precursor to complex organic compounds, and it is a potential biosignature in exoplanetary studies.
Karteyeva V., Nakibov R., Petrashkevich I., Medvedev M., Vasyunin A.   +4 more
doaj   +1 more source

Silica grain catalysis of methanol formation [PDF]

, 2007
The specific catalytic effect of a silica grain on the formation of methanol via the sequential addition of H atoms to CO adsorbed on the surface is investigated.
A. Wander, C. R. A. Catlow, Fraser, Garrod, Hidaka, T. P. M. Goumans, W. A. Brown, Williams, Woon   +8 more
core   +1 more source

Effects of turbulent dust grain motion to interstellar chemistry

, 2015
Theoretical studies have revealed that dust grains are usually moving fast through the turbulent interstellar gas, which could have significant effects upon interstellar chemistry by modifying grain accretion.
Ge, J. X., He, J. H., Yan, H. R.
core   +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, Aa. Sandqvist, Bergin, C. D. Wilson, Chin, Chièze, Combes, Dufour, Frayer, Frisk, Goldsmith, Goldsmith, Gordon, Graedel, Harries, L. Pagani, Langer, Larsson, Liszt, Liszt, M. Olberg, Pagani, Peimbert, R. S. Booth, Roberts, Rubio, Rubio, Rubio, Spaans, U. Frisk, Vermeij, Viti, White, Wilke, Wilke, Wilson, Å. Hjalmarson   +36 more
core   +1 more source

The Effects of Molecular Anions on the Chemistry of Dark Clouds [PDF]

, 2009
We have investigated the role of molecular anion chemistry in pseudo-time dependent chemical models of dark clouds. With oxygen-rich elemental abundances, the addition of anions results in a slight improvement in the overall agreement between model ...
Barkholtz, Brünken, Catherine Walsh, Cernicharo, Eichelberger, Eric Herbst, Gupta, Gupta, Harada, Herbst, Kawaguchi, McCarthy, Millar, Nanase Harada, Remijan, Sakai, Sakai, Sarre, T. J. Millar, Terzieva, Thaddeus, Tielens, Wakelam, Watanabe   +23 more
core   +2 more sources

A KINETIC DATABASE FOR ASTROCHEMISTRY (KIDA) [PDF]

The Astrophysical Journal Supplement Series, 2012
Accepted for publication in ...
Wakelam, Valentine, Herbst, E., Loison, J. -C., Smith, I. W. M., Chandrasekaran, V., Pavone, B., Adams, N. G., Bacchus-Montabonel, M. -C., Bergeat, A., Béroff, K., Bierbaum, V. M., Chabot, M., Dalgarno, A., van Dishoeck, E. F., Faure, A., Geppert, W. D., Gerlich, D., Galli, D., Hébrard, Eric, Hersant, F., Hickson, K. M., Honvault, P., Klippenstein, S. J., Le Picard, Sébastien D., Nyman, G., Pernot, P., Schlemmer, S., Selsis, Franck, Sims, Ian R, Talbi, D., Tennyson, J., Troe, J., Wester, R., Wiesenfeld, L.   +33 more
openaire   +6 more sources

Charge State Influence on Stability and Isomerism in Dehydrogenated PAHs: Insights from Anthracene, Acridine, and Phenazine

ChemPhysChem, Volume 26, Issue 6, March 15, 2025.
The ionization of anthracene, acridine, and phenazine has been explored, along with the removal of one and two hydrogen atoms, to provide valuable information for astrochemists and to understand the behavior of the resulting structures and their electronic reorganization. Abstract In this study, we systematically explored the stability and isomerism of
Khaldia Zghida, Farouk Hamza Reguig, Manuel Alcamí, Al Mokhtar Lamsabhi   +3 more
wiley   +1 more source

Cretaceous-Tertiary boundary deposits in Denmark: A diachroneity [PDF]

Journal of the Serbian Chemical Society, 2004
The lateral distribution of predominantly terrestrial kerogen or humics enriched with copper(II) porphyrins (Cu-P) across the Danish marine basin implies that the alleged Cretaceous-Tertiary (KT) boundary deposits in western Denmark (at the Nye Kløv ...
Premović Pavle I.
doaj   +1 more source