Results 51 to 60 of about 11,084 (265)

Laboratory surface astrochemistry experiments [PDF]

Review of Scientific Instruments, 2015
Although several research groups have studied the formation of H2 on interstellar dust grains using surface science techniques, few have explored the formation of more complex molecules. A small number of these reactions produce molecules that remain on the surface of interstellar dust grains and, over time, lead to the formation of icy mantles.
Frankland, Victoria, Rosu-Finsen, A, Lasne, J, Collings, MP, McCoustra, MRS   +4 more
openaire   +4 more sources

The Influence of Galactic Cosmic Rays on Ion-Neutral Hydrocarbon Chemistry in the Upper Atmospheres of Free-Floating Exoplanets [PDF]

, 1989
Cosmic rays may be linked to the formation of volatiles necessary for prebiotic chemistry. We explore the effect of cosmic rays in a hydrogen-dominated atmosphere, as a proof-of-concept that ion-neutral chemistry may be important for modelling hydrogen ...
C. Bilger, Ch. Helling, Miller, P. B. Rimmer, Rimmer, Skilling   +5 more
core   +3 more sources

Pathways to Detection of Strongly-Bound Inorganic Species: The Vibrational and Rotational Spectral Data of AlH2OH, HMgOH, AlH2NH2, and HMgNH2

Frontiers in Astronomy and Space Sciences, 2021
Small, inorganic hydrides are likely hiding in plain sight, waiting to be detected toward various astronomical objects. AlH2OH can form in the gas phase via a downhill pathway, and the present, high-level quantum chemical study shows that this molecule ...
Alexandria G. Watrous, Megan C. Davis, Ryan C. Fortenberry   +2 more
doaj   +1 more source

Fate of the Gas-Phase Reaction Between Oxirane and the CN Radical in Interstellar Conditions

Frontiers in Astronomy and Space Sciences, 2021
The escalating identification of new complex molecules in the interstellar medium claims for potential formation routes of such species. In this regard, the present work considers the reaction between oxirane and the CN radical as a feasible formation ...
Silvia Alessandrini, Silvia Alessandrini, Mattia Melosso   +2 more
doaj   +1 more source

Complex Organic Matter Synthesis on Siloxyl Radicals in the Presence of CO

Frontiers in Chemistry, 2021
Heterogeneous phase astrochemistry plays an important role in the synthesis of complex organic matter (COM) as found on comets and rocky body surfaces like asteroids, planetoids, moons and planets. The proposed catalytic model is based on two assumptions:
Marco Fioroni, Nathan J. DeYonker
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

Aromatic Hydrocarbons, Diamonds, and Fullerenes in Interstellar Space: Puzzles to be Solved by Laboratory and Theoretical Astrochemistry [PDF]

, 2000
New research is presented, and previous research is reviewed, on the emission and absorption of interstellar aromatic hydrocarbons. Emission from aromatic hydrocarbons dominate the mid-infrared emission of many galaxies, including our own Milky Way ...
Allamandola, Allamandola, Allamandola, Allamandola, Anders, Andriesse, Bakes, Bakes, Becker, Beintema, Bettens, Blanco, Borghesi, Boulanger, Brooke, Brooke, Cesarsky, Cesarsky, Chiar, Chiar, Cohen, Cohen, Cohen, Cook, Dartois, de Frees, Draine, Duley, Duley, Foing, Foing, Fulara, Gillett, Goeres, Graham, Harvey, Herbig, Heymann, Hudgins, Hudgins, Joblin, K. Sellgren, Kroto, Kroto, Langhoff, Lewis, Léger, Mattila, Merrill, Moutou, Onaka, Oudmaijer, Papoular, Pauzat, Pauzat, Pendleton, Platt, Puget, Puget, Roche, Roche, Russell, Sakata, Sakata, Salama, Salama, Schutte, Schutte, Scott, Sellgren, Sellgren, Sellgren, Sellgren, Sellgren, Sellgren, Sellgren, Sellgren, Snow, Somerville, Szczepanski, Uchida, Uchida, Whitcomb   +82 more
core   +2 more sources

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

Astrochemistry of dust, ice and gas: introduction and overview

, 2014
A brief introduction and overview of the astrochemistry of dust, ice and gas and their interplay is presented, aimed at non-specialists. The importance of basic chemical physics studies of critical reactions is illustrated through a number of recent ...
van Dishoeck, Ewine F.
core   +1 more source

Laboratory Photo-chemistry of PAHs: Ionization versus Fragmentation [PDF]

, 2015
Interstellar polycyclic aromatic hydrocarbons (PAHs) are expected to be strongly processed by vacuum ultraviolet photons. Here, we report experimental studies on the ionization and fragmentation of coronene (C24H12), ovalene (C32H14) and hexa-peri ...
Castellanos, Pablo, Joblin, Christine, Ligterink, Niels, Linnartz, Harold, NAhon, Laurent, Paardekooper, Daniel M., Tielens, Alexander G. G. M., Zhen, Junfeng   +7 more
core   +3 more sources