Molecular Chemistry for Dark Matter. III. DarkKROME

Michael Ryan, Sarah Shandera, James Gurian, Donghui Jeong

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


Dark matter that is dissipative may cool sufficiently to form compact objects, including black holes. Determining the abundance and mass spectrum of those objects requires an accurate model of the chemistry relevant for the cooling of the dark matter gas. Here we introduce a chemistry tool for dark matter, DarkKROME, an extension of the KROME software package. DarkKROME is designed to include all atomic and molecular processes relevant for dark matter with two unequal-mass fundamental fermions, interacting via a massless-photon-mediated U(1) force. We use DarkKROME to perform one-zone collapse simulations and study the evolution of temperature-density phase diagrams for various dark sector parameters. DarkKROME is publicly available at

Original languageEnglish (US)
Article number122
JournalAstrophysical Journal
Issue number2
StatePublished - Aug 1 2022

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


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