Results of multipole expansion of gravitational potential of Milky Way analogues from HESTIA simulations.
HESTIA is a set of cosmological simulations made under observational constraints to reproduce the Local Group of galaxies in a realistic environment. The project website is https://hestia.aip.de/.
This repository contains the results of multipole expansion of gravitational potential of Milky Way analogues from this simulation suite computed in the paper https://arxiv.org/abs/2412.18880. The expansion coeffitients were computed by the AGAMA code and can be easily read by it with the agama.potential() method. Coefficients can be used to e.g. compute trajectories of stars, globular clusters, etc.
These data cover the last 6 Gyr of time and are stored as snapshots with numbers from 91 to 127 (what corresponds to snapshot numbers in the original HESTIA data). A file with snapshot scale factors is provided. There are 14 realizations of Milky Way analogues with lower resolution, called "4k", and 3 realizations with higher resolution, called "8k".
File names:
- NN_MM are Local Group analogue codes
- Rmax or Rvir correspond to two types of data used to build the multipole expansion: Rmax is for all particles up to 3 Mpc from MW center, Rvir is up to the virial radius.
- pot means potential
- Bar / DM / sum are for baryonic matter, dark matter, and all matter
- nnn is snapshot number
Files *cm.txt contain positions of Milky Way analogue in phycical kiloparsecs (without h^{-1}) (not comoving) relative to the position at z=0.
Files M31* contain positions of M31 analogue at each snapshot relative to the Milky Way analogue position at that same snapshot, in physical kiloparsecs.
When using this data, please, cite the following papers: Libeskind et al. https://doi.org/10.1093/mnras/staa2541 Arakelyan et al. https://arxiv.org/abs/2412.18880