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Cold CO in circumstellar disks: On the effects of photodesorption and vertical mixing
F. Hersant, V. Wakelam, A. Dutrey +2
Aims. We attempt to understand the presence of gas phase CO below its freezing temperature in circumstellar disks. We study two promising mechanisms to explain this phenomenon: tur…
Time-dependent models of dense PDRs with complex molecules
O. Morata, E. Herbst
We present a study of the chemistry of a dense photon-dominated region (PDR) using a time-dependent chemical model. Our major interest is to study the spatial distribution of compl…
Modeling Carbon Chain Anions in L1527
Nanase Harada, Eric Herbst
The low-mass protostellar region L1527 is unusual because it contains observable abundances of unsaturated carbon-chain molecules including CnH radicals, H2Cn carbenes, cyanopolyyn…
Modeling the Lukewarm Corino Phase - is L1527 unique?
George E. Hassel, Eric Herbst, Robin T. Garrod
Sakai et al. have observed long-chain unsaturated hydrocarbons and cyanopolyynes in the low-mass star-forming region L1527, and have attributed this result to a gas-phase ion-molec…
Complex Chemistry in Star-Forming Regions: An Expanded Gas-Grain Warm-up Chemical Model
Robin T. Garrod, Susanna L. Widicus Weaver, Eric Herbst
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 evidenc…
Molecular Evolution and Star Formation: From Prestellar Cores to Protostellar Cores
Yuri Aikawa, Valentine Wakelam, Robin T. Garrod +1
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…