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Code used to constrain dark matter substructure in the solar neighborhood with Gaia eDR3 wide binaries.

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arXiv License: MIT Python Repo Size

dmbinaries

This repository contains the code used to produce the results shown in arXiv:2209.08100. It is meant to act as a supplement focusing more on the actual structure of the code. Through our tutorial notebooks, we hope to help others in either better understanding our results or perform their own set of simulations for various purposes such as: setting their own constraints on subhalos, simulate binary evolution for some other purpose, or improve this code to set more robust limits.

Please read the README.md file within each file for content information. We strongly encourage readers to read the paper before working with the code.

Installation

Run the environment.yml file by running the following command on the main repo directory:

conda env create

The installation works for conda==22.9.0.

Directory Structure

1. Data

  • Directory: data
    • Purpose: Show how we manipulated data to obtain the sample of binaries used to set constraints on dark matter subhalos

2. Binary Evolution Simulations

  • Directory: evolution
    • Purpose: Simulate the evolution of binaries subject to tidal encounters with extended subhalos

3. Limits on Subhalos

  • Directory: statistics
    • Purpose: Set limits on subhalos given the sample of binaries and the results of the binary evolution simulations

4. Supplementary Material

  • Directory: supplement
    • Purpose: Provide more detailed discussions and derivations of various results

5. Figures

  • Directory: figures
    • Purpose: Produces all the figures in the paper for readers that might benefit from manipulating the data