GGCHEMPY: A pure Python-based gas-grain chemical code for efficient simulation of interstellar chemistry

Abstract

In this paper, we present a new gas-grain chemical code for interstellar clouds written in pure Python (GGCHEMPY). By combining with the high-performance Python compiler Numba, GGCHEMPY is as efficient as the Fortran-based version. With the Python features, flexible computational workflows and extensions become possible. As a showcase, GGCHEMPY is applied to study the general effects of three-dimensional projection on molecular distributions using a two-core system which can be easily extended for more complex cases. By comparing the molecular distribution differences between two overlapping cores and two merging cores, we summarized the typical chemical differences such as, N2H+, HC3N, C2S, H2CO, HCN and C2H, which can be used to interpret 3-D structures in molecular clouds.

Accepted for publication in RAA. GGCHEMPY is available on https://github.com/JixingGE/GGCHEMPY

References in corpus (14)

• Complex Chemistry in Star-Forming Regions: An Expanded Gas-Grain Warm-up Chemical Model
• 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
• Isotopic fractionation of carbon, deuterium and nitrogen : a full chemical study
• UCLCHEM: A Gas-Grain Chemical Code
• The observed chemical structure of L1544
• ALMA Survey of Orion Planck Galactic Cold Clumps (ALMASOP) II. Survey overview: a first look at 1.3 mm continuum maps and molecular outflows
• Magnetized interstellar molecular clouds: II. The Large-Scale Structure and Dynamics of Filamentary Molecular Clouds
• SCOPE: SCUBA-2 Continuum Observations of Pre-protostellar Evolution - Survey Description and Compact Source Catalogue
• ALMA Survey of Orion Planck Galactic Cold Clumps (ALMASOP): Detection of extremely high density compact structure of prestellar cores and multiple substructures within
• Planck Cold Clumps in the lambda Orionis Complex. III. A chemical probe of stellar feedback on cores in the lambda Orionis cloud
• Chemical compositions of five Planck cold clumps
• Characterization of dense Planck clumps observed with Herschel and SCUBA-2
• Chemical properties of two dense cores in a Planck Galactic Cold Clump G168.72-15.48