Chempl: a playable package for modeling interstellar chemistry

Abstract

Astrochemical modeling is needed for understanding the formation and evolution of interstellar molecules, and for extracting physical information from spectroscopic observations of interstellar clouds. The modeling usually involves handling of a chemical reaction network and solution of a set of coupled nonlinear ordinary differential equations, which is traditionally done using code written in compiled languages such as Fortran or C/C++. While being computationally efficient, there is room for improvement in the ease of use and interactivity for such an approach. In this work we present a new public code named Chempl, which emphasizes interactivity in a modern Python environment, while remaining computationally efficient. Common reaction mechanisms and a three-phase formulation of gas-grain chemistry are implemented by default. It is straightforward to run 0D models with Chempl, and only a small amount of additional code is needed to construct 1D or higher dimensional chemical models. We demonstrate its usage with a few astrochemically relevant examples.

Accepted by Research in Astronomy and Astrophysics

References in corpus (10)

• Formation of methyl formate and other organic species in the warm-up phase of hot molecular cores
• Non-thermal desorption from interstellar dust grains via exothermic surface reactions
• Simulation of the Formation and Morphology of Ice Mantles on Interstellar Grains
• UCLCHEM: A Gas-Grain Chemical Code
• A new modified-rate approach for gas-grain chemical simulations
• Density-enhanced gas and dust shells in a new chemical model for IRC+10216
• Water vapor distribution in protoplanetary disks
• Interstellar Simulations Using A Unified Microscopic-Macroscopic Monte Carlo Model with a full Gas-Grain Network including Bulk Diffusion in Ice Mantles
• Photodesorption of water ice from dust grains and thermal desorption of cometary ices studied by the INSIDE experiment
• Accretion and photodesorption of CO ice as a function of the incident angle of deposition

Cited by in corpus (5)

• The chemical structure of young high-mass star-forming clumps: (II) parsec-scale CO depletion and deuterium fraction of $\mathrm{HC}{\mathrm{O}}^{+}$
• GGCHEMPY: A pure Python-based gas-grain chemical code for efficient simulation of interstellar chemistry
• Protonated hydrogen cyanide as a tracer of pristine molecular gas
• Chemical evolution during the formation of molecular clouds
• Shock-induced HCNH+ abundance enhancement in the heart of the starburst galaxy NGC 253 unveiled by ALCHEMI