Complex Chemistry in Star-forming Regions: An Expanded Gas-Grain Warm-up Chemical Model
- R. Garrod, S. W. Weaver, E. Herbst
- Geology, Chemistry
- 8 March 2008
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 on…
A THREE-PHASE CHEMICAL MODEL OF HOT CORES: THE FORMATION OF GLYCINE
- R. Garrod
- Physics
- 4 February 2013
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 such…
Formation rates of complex organics in UV irradiated CH3OH-rich ices I: Experiments
- K. Oberg, R. Garrod, E. Dishoeck, H. Linnartz
- Physics
- 8 August 2009
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 by…
Non-thermal desorption from interstellar dust grains via exothermic surface reactions
- R. Garrod, V. Wakelam, E. Herbst
- Physics, Chemistry
- 8 March 2007
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 appears…
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 CO2. We use a three-phase model (gas/surface/mantle) to simulate…
Molecular Evolution and Star Formation: From Prestellar Cores to Protostellar Cores
- Y. Aikawa, V. Wakelam, R. Garrod, E. Herbst
- Physics
- 3 October 2007
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-dimensional…
The ALMA Protostellar Interferometric Line Survey (PILS)
- J. Jørgensen, M. Wiel, S. Wampfler
- Physics
- 29 July 2016
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 may…
Increased complexity in interstellar chemistry: detection and chemical modeling of ethyl formate and n-propyl cyanide in Sagittarius B2(N)
- A. Belloche, R. Garrod, U. Cologne
- Chemistry
- 26 February 2009
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 that…
Exploring Molecular Complexity with ALMA (EMoCA): Deuterated complex organic molecules in Sagittarius B2(N2)
- A. Belloche, H. Muller, R. Garrod, K. Menten
- Physics
- 18 November 2015
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 molecules…
Grain Surface Models and Data for Astrochemistry
- H. Cuppen, C. Walsh, S. Ioppolo
- Chemistry
- 12 January 2017
The cross-disciplinary field of astrochemistry exists to understand the formation, destruction, and survival of molecules in astrophysical environments. Molecules in space are synthesized via a large…
...
...