CSiBORG Tools

Tools for analysing the suite of Constrained Simulations in BORG (CSiBORG) simulations. The interface is designed to work with the following suites of simulations: CSiBORG1 (dark matter-only RAMSES), CSiBORG2 (dark matter-only Gadget4), Quijote (dark-matter only Gadget2), however with little effort it can support other simulations as well.

Ongoing projects

Consistent halo reconstruction

• Make a sketch of the overlap definition and add it to the paper.
• Improve the storage system for overlaps and calculate it for all simulations.

Enviromental dependence of galaxy properties

• Prepare the CSiBORG one particle files for SPH.
• Transfer, calculate the SPH density field for CSiBORG1 and transfer back.
• Check that the velocity-field flipping of x and z coordinates is correct.
• Evaluate and share the density field for SDSS and SDSSxALFALFA for both CSiBORG2 and random fields.
• Check and verify the density field of galaxy colours (cannot do this now! Glamdring is super slow.)

Calculated data

SPH-density & velocity field

• CSiBORG2_main, CSiBORG2_random, CSiBORG2_varysmall
• Evaluated for SDSS and SDSSxALFALFA in: CSiBORG2_main, CSiBORG2_random

Radial velocity field

Mass-assembly of massive clusters

• Make a list of nearby most-massive clusters.
• Write code to identify a counterpart of such clusters.
• Write code to make a plot of mass-assembly of all clusters within a certain mass range from the random simulations.
• Write code to compare mass-assembly of a specific cluster with respect to random ones.

Effect of small-scale noise

• Study how the small-scale noise variation affects the overlap measure, halo concentration and spin.

Gravitational-wave and large-scale structure

• Make the velocity field data available.

CSiBORG meets X-ray

• Make available one example snapshot from the simulation. Mention the issue with x- and z-coordinates.

CSiBORG advertising

• Decide on the webpage design and what to store there.
• Write a short letter describing the simulations.