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Complex Chemistry in Star-forming Regions: An Expanded Gas-Grain Warm-up Chemical Model
Gas-phase processes were long thought to be the key formation mechanisms for complex organic molecules in star-forming regions. However, recent experimental and theoretical evidence has cast doubt onExpand
A Three-phase Chemical Model of Hot Cores: The Formation of Glycine
A new chemical model is presented that simulates fully coupled gas-phase, grain-surface, and bulk-ice chemistry in hot cores. Glycine (NH2CH2COOH), the simplest amino acid, and related molecules suchExpand
On the Formation of CO2 and Other Interstellar Ices
We investigate the formation and evolution of interstellar dust-grain ices under dark-cloud conditions, with a particular emphasis on CO{sub 2}. We use a three-phase model (gas/surface/mantle) toExpand
Non-thermal desorption from interstellar dust grains via exothermic surface reactions
Aims. The gas-phase abundance of methanol in dark quiescent cores in the interstellar medium cannot be explained by gas-phase chemistry. In fact, the only possible synthesis of this species appearsExpand
Formation rates of complex organics in UV irradiated CH3OH-rich ices I: Experiments
Context. Gas-phase complex organic molecules are commonly detected in the warm inner regions of protostellar envelopes, so-called hot cores. Recent models show that photochemistry in ices followed byExpand
Molecular Evolution and Star Formation: From Prestellar Cores to Protostellar Cores
We investigate molecular evolution in a star-forming core that is initially a hydrostatic starless core and collapses to form a low-mass protostar. The results of a one-dimensionalExpand
The ALMA Protostellar Interferometric Line Survey (PILS)
The inner regions of the envelopes surrounding young protostars are characterised by a complex chemistry, with prebiotic molecules present on the scales where protoplanetary disks eventually mayExpand
Increased complexity in interstellar chemistry: detection and chemical modeling of ethyl formate and n-propyl cyanide in Sagittarius B2(N)
Context. In recent years, organic molecules of increasing complexity have been found toward the prolific Galactic center source Sagittarius B2. Aims. We wish to explore the degree of complexity thatExpand
Exploring Molecular Complexity with ALMA (EMoCA): Deuterated complex organic molecules in Sagittarius B2(N2)
Deuteration is a powerful tracer of the history of the cold prestellar phase in star forming regions. Apart from methanol, little is known about deuterium fractionation of complex organic moleculesExpand
Three-dimensional off-lattice Monte Carlo kinetics simulations of interstellar grain chemistry and ice structure
The first off-lattice Monte Carlo kinetics model of interstellar dust-grain surface chemistry is presented. The positions of all surface particles are determined explicitly, according to the localExpand