Resources

Data and networks from past models

 

Data/network related to Belloche et al. (2014) Science paper on the first interstellar detection of normal- and iso-propyl cyanide:

Chemical network

Binding energies / surface reaction activation energy barriers

 

Binding energies related to Garrod & Herbst (2006) paper on hot core chemistry:

Binding energies

 

TRICKS - TRainer for Interstellar Chemical Kinetics Simulations

 

TRICKS is a simple, and primarily gas-phase, astrochemical kinetics model, based on the Garrod group's flagship gas-grain code MAGICKAL. The TRICKS code is copyright R. T. Garrod (2022), but may be downloaded and used for training/educational purposes. The ODE solver included in the zipped files is not under my copyright. TRICKS should not be uploaded to Github or other code-sharing sites/services.

No responsibility is taken for any bugs in the code(!) but it will be updated from time to time. It is written in Fortran (77 style) and should be possible to run using commonly available compilers including f77, gfortran and ifort; the Makefile included in the download can be adjusted to the preferred compiler. The code is set up to produce results for a dark cloud simulation, and produces results in typical text format, as well as a comma separated variable (csv) output file that be directly opened using a spreadsheet such as MS Excel. Another csv file provides the log of the time and fractional abundance data to make plotting of the raw data easier in a spreadsheet.

The chemical network includes a basic deuterium chemistry (which is somewhat outdated), while the rest of the gas-phase chemistry is fairly up to date and is based on a simplified version of the current MAGICKAL network. Adsorption/freeze-out is included (a J-prefix denotes grain-surface species), along with a quasi-surface-chemistry treatment that converts adsorbed gas-phase species into (possibly) different grain-surface species. A fraction of methanol (CH3OH) produced on the grains in this way is returned to the gas phase. The grain-surface reaction H+H → H2 is the only one to be modeled explicitly, using a simple diffusive rate treatment. Several options and model quantities may be selected by editing the plain-text "control" file. Any changes made to the control file do not require the code to be re-compiled.

If you wish to use the code for research purposes (not advised!), you may wish to contact me directly first. With that caveat, I don't object to results obtained with TRICKS being published. In which case, please credit the code to R. T. Garrod, stating the name of the code and the version used (currently v2.3).

Code (v2.3)

Dark cloud outputs (v2.3)

Guide to running TRICKS (pdf)