Neutron Star Merger Accretion Disk Trajectories for Nucleosynthesis

Contained herein are a set of trajectories derived from 30 Lagrangian tracers from the post-neutron-star-merger accretion disk simulation described in Lund et al. 2024 (DOI:10.3847/1538-4357/ad25ef). These tracers are from the simulation labeled b10 in the text. These tracers have been selected in a way that is agnostic to the actual abundance patterns yielded by the full set of 195k+ tracers. The aim was to obtain a small, significantly more manageable set of tracer that represent conditions in the disk. As such, the conditions for selection were bins in electron fraction (Ye) and radial velocity.The tracers with velocities of less than 0.2c are subdivided (binned) by 0-0.08c (low v) and 0.08-0.2c (high v). While these values capture most of the mass in the disk, it should be noted that higher velocity tracers do exist and are not necessarily captured in this sample. Then, for each of the two velocity "bins", the tracers are further binned by Ye, and one tracer is selected from each bin, for a total of 30.Each tracer has a mass from the simulation. While these are recorded in the file tracer_reference, one should instead use the "assigned mass", which represents the mass contained in the bin. The text file tracer_reference.txt contains the following: Ye bin represented ID (unique for each simulation tracer particle) Velocity bin (either low or high as defined above) the tracer represents and the mass (in solar masses) one should assign to it Folders and files included:- Trajectories folder: contains individual subdirectories for each of the 30 tracers particles, named trace_{ID_of_tracer}. Within, there are three individual files: - initx.dat: The initial composition calculated at T=10GK, formatted as Z | A | Mass Fraction - metadata.dat: Can mostly be ignored, but contain some identifying information for the ID's tracer. - trajectory.dat: Thermodynamic evolution in PRISM format, with columns: time (s) | T (GK) | density (g/cm3)