Chemodynamics in Star-Forming Molecular Clouds
In this thesis, chemodynamical simulations are applied to star-forming regions to follow their combined physical and chemical evolution and make predictions for observations. In particular a gas phase deuterium fractionation network is applied to massive prestellar core simulations. Various chemical model parameters are investigated to understand whether fast collapse of a turbulent, magnetised prestellar core can achieve the high levels of deuteration that are commonly observed in such systems. The structure, kinematics and dynamics of the core, as traced by the rotational transitions of the key diagnostic species of $\rm N_2D^+$, are investigated. Another astrochemical network, including gas-grain processes, is constructed for simulations of larger-scale, generally lower density molecular clouds and applied to a simulation of giant molecular cloud collisions. We also discuss the computational performance of our chemodynamical simulations and summarize some methods to improve their efficiency.
Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik
Deuterium Chemodynamics of Massive Pre-Stellar Cores
Monthly Notices of the Royal Astronomical Society,; Vol. 502(2021)p. 1104-1127
Artikel i vetenskaplig tidskrift
Astronomi, astrofysik och kosmologi
Opponent: Dr. Patrick Hennebelle, Laboratoire d'Astrophysique, Paris-Saclay, CEA, France