AMReX-Astro/Microphysics

Issues somebody may already be working on are listed last. List everything by date

• HIP build fails for networks with no intermediate reactions with libstdc++ >= 13 (std::array<int, 0> in locate_intermediate_rate_index)

  Open

  ⋯Report a problem with this issue

  • Is something wrong?

  • Already taken
  • Not beginner-friendly
  • Stale or invalid
  • Something else…
  • Send Cancel
  bug GPU

  Difficulty 2/5 1-3 hours Newbie friendliness 69/100

  AMReX-Astro/Microphysics#2115 · Opened Oct 19, 2026

  Maintainers usually reply within 1 day

• Screening Method Approaches for NSE compatibility

  Open

  ⋯Report a problem with this issue

  • Is something wrong?

  • Already taken
  • Not beginner-friendly
  • Stale or invalid
  • Something else…
  • Send Cancel

  Difficulty 5/5 Over a week Newbie friendliness 25/100

  AMReX-Astro/Microphysics#2104 · 3 comments · Opened Sep 29, 2026

  Maintainers usually reply within 1 day

• Debye-Huckel shortcut creates a discontinuous screening factor

  Open

  ⋯Report a problem with this issue

  • Is something wrong?

  • Already taken
  • Not beginner-friendly
  • Stale or invalid
  • Something else…
  • Send Cancel
  ai-code-audit screening

  Difficulty 4/5 3-5 days Newbie friendliness 55/100

  AMReX-Astro/Microphysics#2097 · 1 comment · Opened Sep 14, 2026

  Maintainers usually reply within 1 day

• Screening temperature derivatives do not differentiate the returned value

  Open

  ⋯Report a problem with this issue

  • Is something wrong?

  • Already taken
  • Not beginner-friendly
  • Stale or invalid
  • Something else…
  • Send Cancel
  ai-code-audit screening

  Difficulty 4/5 3-5 days Newbie friendliness 72/100

  AMReX-Astro/Microphysics#2096 · Opened Sep 14, 2026

  Maintainers usually reply within 1 day

• Approximate arctangent introduces jumps in screening free energies

  Open

  ⋯Report a problem with this issue

  • Is something wrong?

  • Already taken
  • Not beginner-friendly
  • Stale or invalid
  • Something else…
  • Send Cancel
  ai-code-audit screening

  Difficulty 4/5 3-5 days Newbie friendliness 66/100

  AMReX-Astro/Microphysics#2095 · 1 comment · Opened Sep 14, 2026

  Maintainers usually reply within 1 day

• NSE derivatives remain nonzero outside the clamped table domain

  Open

  ⋯Report a problem with this issue

  • Is something wrong?

  • Already taken
  • Not beginner-friendly
  • Stale or invalid
  • Something else…
  • Send Cancel
  ai-code-audit nse

  Difficulty 3/5 1-2 days Newbie friendliness 68/100

  AMReX-Astro/Microphysics#2075 · Opened Sep 8, 2026

  Maintainers usually reply within 1 day

• The default energy inversion does not report iteration exhaustion

  May be free again @zhichen3 claimed this 42 days ago, and no pull request is open. Open

  ⋯Report a problem with this issue

  • Is something wrong?

  • Already taken
  • Not beginner-friendly
  • Stale or invalid
  • Something else…
  • Send Cancel
  ai-code-audit nse

  AMReX-Astro/Microphysics#2071 · 1 comment · 1 assignee · Opened Sep 7, 2026

  Maintainers usually reply within 1 day

• nse_solver: The energy Jacobian differentiates at fixed Ye, but the residual does not

  May be free again @zhichen3 claimed this 42 days ago, and no pull request is open. Open

  ⋯Report a problem with this issue

  • Is something wrong?

  • Already taken
  • Not beginner-friendly
  • Stale or invalid
  • Something else…
  • Send Cancel
  ai-code-audit nse

  AMReX-Astro/Microphysics#2070 · 1 assignee · Opened Sep 7, 2026

  Maintainers usually reply within 1 day

• SDC temperature cutoff discards advective sources as well as reactions

  Open

  ⋯Report a problem with this issue

  • Is something wrong?

  • Already taken
  • Not beginner-friendly
  • Stale or invalid
  • Something else…
  • Send Cancel
  ai-code-audit integrator

  Difficulty 3/5 1-2 days Newbie friendliness 76/100

  AMReX-Astro/Microphysics#2059 · Opened Sep 7, 2026

  Maintainers usually reply within 1 day

• VODE numerical Jacobian corrupts later columns when abundances are renormalized

  Open

  ⋯Report a problem with this issue

  • Is something wrong?

  • Already taken
  • Not beginner-friendly
  • Stale or invalid
  • Something else…
  • Send Cancel
  ai-code-audit integrator

  Difficulty 3/5 1-2 days Newbie friendliness 72/100

  AMReX-Astro/Microphysics#2058 · 1 comment · Opened Sep 7, 2026

  Maintainers usually reply within 1 day

• are we filling y_e in the burn_state that get's passed to the nets?

  Open

  ⋯Report a problem with this issue

  • Is something wrong?

  • Already taken
  • Not beginner-friendly
  • Stale or invalid
  • Something else…
  • Send Cancel

  Difficulty 4/5 3-5 days Newbie friendliness 45/100

  AMReX-Astro/Microphysics#1980 · Opened Apr 23, 2026

  Maintainers usually reply within 1 day

• try QSS for primordial chem

  May be free again @BenWibking claimed this 206 days ago, and no pull request is open. Open

  ⋯Report a problem with this issue

  • Is something wrong?

  • Already taken
  • Not beginner-friendly
  • Stale or invalid
  • Something else…
  • Send Cancel
  enhancement

  AMReX-Astro/Microphysics#1972 · 3 comments · 1 assignee · Opened Mar 27, 2026

  Maintainers usually reply within 1 day

• util/hybrj: NaN/Inf handling in enorm can cause false convergence

  Open

  ⋯Report a problem with this issue

  • Is something wrong?

  • Already taken
  • Not beginner-friendly
  • Stale or invalid
  • Something else…
  • Send Cancel
  ai-code-audit

  Difficulty 4/5 3-5 days Newbie friendliness 35/100

  AMReX-Astro/Microphysics#1960 · Opened Mar 11, 2026

  Maintainers usually reply within 1 day

• he-burn approximate rates need denominator guard

  Open

  ⋯Report a problem with this issue

  • Is something wrong?

  • Already taken
  • Not beginner-friendly
  • Stale or invalid
  • Something else…
  • Send Cancel
  ai-code-audit

  Difficulty 4/5 3-5 days Newbie friendliness 45/100

  AMReX-Astro/Microphysics#1947 · 1 comment · Opened Mar 3, 2026

  Maintainers usually reply within 1 day

• metal_chem parser OOB on blank/comment lines

  May be free again @BenWibking claimed this 230 days ago, and no pull request is open. Open

  ⋯Report a problem with this issue

  • Is something wrong?

  • Already taken
  • Not beginner-friendly
  • Stale or invalid
  • Something else…
  • Send Cancel
  ai-code-audit

  AMReX-Astro/Microphysics#1943 · 1 assignee · Opened Mar 3, 2026

  Maintainers usually reply within 1 day

• adopt logo

  Open

  ⋯Report a problem with this issue

  • Is something wrong?

  • Already taken
  • Not beginner-friendly
  • Stale or invalid
  • Something else…
  • Send Cancel

  Difficulty 5/5 Over a week Newbie friendliness 20/100

  AMReX-Astro/Microphysics#1838 · Opened Jul 15, 2025

  Maintainers usually reply within 1 day

• consider implementing Stoichiometry-compatible Reconstruction

  Open

  ⋯Report a problem with this issue

  • Is something wrong?

  • Already taken
  • Not beginner-friendly
  • Stale or invalid
  • Something else…
  • Send Cancel

  Difficulty 5/5 Over a week Newbie friendliness 20/100

  AMReX-Astro/Microphysics#1816 · Opened Jun 24, 2025

  Maintainers usually reply within 1 day

• consider simplifying the NSE table integration

  Open

  ⋯Report a problem with this issue

  • Is something wrong?

  • Already taken
  • Not beginner-friendly
  • Stale or invalid
  • Something else…
  • Send Cancel
  integrator nse sdc

  Difficulty 5/5 Over a week Newbie friendliness 25/100

  AMReX-Astro/Microphysics#1814 · Opened Jun 23, 2025

  Maintainers usually reply within 1 day

• implement 2nd order RKC with monotone stability

  Open

  ⋯Report a problem with this issue

  • Is something wrong?

  • Already taken
  • Not beginner-friendly
  • Stale or invalid
  • Something else…
  • Send Cancel
  integrator

  Difficulty 5/5 Over a week Newbie friendliness 25/100

  AMReX-Astro/Microphysics#1800 · 1 comment · Opened Jun 5, 2025

  Maintainers usually reply within 1 day

• Add new components for radiation energy density

  Open

  ⋯Report a problem with this issue

  • Is something wrong?

  • Already taken
  • Not beginner-friendly
  • Stale or invalid
  • Something else…
  • Send Cancel

  Difficulty 5/5 Over a week Newbie friendliness 25/100

  AMReX-Astro/Microphysics#1775 · 51 comments · Opened Mar 12, 2025

  Maintainers usually reply within 1 day

• Missing extern_parameters.cpp when compiling burn_cell in DEBUG mode

  Open

  ⋯Report a problem with this issue

  • Is something wrong?

  • Already taken
  • Not beginner-friendly
  • Stale or invalid
  • Something else…
  • Send Cancel

  Difficulty 2/5 1-3 hours Newbie friendliness 35/100

  AMReX-Astro/Microphysics#1774 · 5 comments · Opened Mar 5, 2025

  Maintainers usually reply within 1 day

• Allow using BackwardEuler integrator instead of VODE

  Open

  ⋯Report a problem with this issue

  • Is something wrong?

  • Already taken
  • Not beginner-friendly
  • Stale or invalid
  • Something else…
  • Send Cancel
  integrator

  Difficulty 3/5 1-2 days Newbie friendliness 45/100

  AMReX-Astro/Microphysics#1772 · Opened Mar 3, 2025

  Maintainers usually reply within 1 day

• burn_cell_[metal,primordial]_chem redefines primary_species_* to be real

  May be free again @psharda claimed this 616 days ago, and no pull request is open. Open

  ⋯Report a problem with this issue

  • Is something wrong?

  • Already taken
  • Not beginner-friendly
  • Stale or invalid
  • Something else…
  • Send Cancel

  AMReX-Astro/Microphysics#1748 · 1 assignee · Opened Feb 11, 2025

  Maintainers usually reply within 1 day

• add the explicit Patankar-Euler-Deflhard integrator

  Open

  ⋯Report a problem with this issue

  • Is something wrong?

  • Already taken
  • Not beginner-friendly
  • Stale or invalid
  • Something else…
  • Send Cancel
  integrator

  Difficulty 5/5 Over a week Newbie friendliness 20/100

  AMReX-Astro/Microphysics#1720 · 1 comment · Opened Jan 15, 2025

  Maintainers usually reply within 1 day

• loop over cells in order by cost to reduce divergence

  Open

  ⋯Report a problem with this issue

  • Is something wrong?

  • Already taken
  • Not beginner-friendly
  • Stale or invalid
  • Something else…
  • Send Cancel
  enhancement GPU reactions

  Difficulty 5/5 Over a week Newbie friendliness 25/100

  AMReX-Astro/Microphysics#1683 · Opened Dec 8, 2024

  Maintainers usually reply within 1 day

• templating integrator functions on NumSpec, actual_rhs

  Open

  ⋯Report a problem with this issue

  • Is something wrong?

  • Already taken
  • Not beginner-friendly
  • Stale or invalid
  • Something else…
  • Send Cancel
  enhancement integrator

  Difficulty 5/5 Over a week Newbie friendliness 28/100

  AMReX-Astro/Microphysics#1657 · 2 comments · Opened Oct 3, 2024

  Maintainers usually reply within 1 day

• consider adopting SmallMatrix

  Open

  ⋯Report a problem with this issue

  • Is something wrong?

  • Already taken
  • Not beginner-friendly
  • Stale or invalid
  • Something else…
  • Send Cancel
  enhancement integrator

  Difficulty 5/5 Over a week Newbie friendliness 15/100

  AMReX-Astro/Microphysics#1656 · 1 comment · Opened Oct 1, 2024

  Maintainers usually reply within 1 day

• Implement cosmic ray attenuation

  Open

  ⋯Report a problem with this issue

  • Is something wrong?

  • Already taken
  • Not beginner-friendly
  • Stale or invalid
  • Something else…
  • Send Cancel
  enhancement

  Difficulty 5/5 Over a week Newbie friendliness 20/100

  AMReX-Astro/Microphysics#1653 · Opened Sep 18, 2024

  Maintainers usually reply within 1 day

• Fix bug in primordial chemistry chemical heating

  May be free again @psharda claimed this 789 days ago, and no pull request is open. Open

  ⋯Report a problem with this issue

  • Is something wrong?

  • Already taken
  • Not beginner-friendly
  • Stale or invalid
  • Something else…
  • Send Cancel
  bug

  AMReX-Astro/Microphysics#1641 · 1 assignee · Opened Aug 21, 2024

  Maintainers usually reply within 1 day

• lower the default ode_max_steps

  Open

  ⋯Report a problem with this issue

  • Is something wrong?

  • Already taken
  • Not beginner-friendly
  • Stale or invalid
  • Something else…
  • Send Cancel
  integrator

  Difficulty 3/5 1-2 days Newbie friendliness 35/100

  AMReX-Astro/Microphysics#1634 · Opened Jul 29, 2024

  Maintainers usually reply within 1 day

• add ideal gas EOS with tabulated mean molecular weight

  Open

  ⋯Report a problem with this issue

  • Is something wrong?

  • Already taken
  • Not beginner-friendly
  • Stale or invalid
  • Something else…
  • Send Cancel
  enhancement EOS

  Difficulty 5/5 Over a week Newbie friendliness 25/100

  AMReX-Astro/Microphysics#1488 · 2 comments · Opened Feb 20, 2024

  Maintainers usually reply within 1 day

• use std::expected to handle burn failures?

  Open

  ⋯Report a problem with this issue

  • Is something wrong?

  • Already taken
  • Not beginner-friendly
  • Stale or invalid
  • Something else…
  • Send Cancel
  enhancement integrator reactions

  Difficulty 5/5 Over a week Newbie friendliness 25/100

  AMReX-Astro/Microphysics#1439 · 4 comments · Opened Jan 3, 2024

  Maintainers usually reply within 1 day

• add option to skip neutrino cooling if it is insignificant

  Open

  ⋯Report a problem with this issue

  • Is something wrong?

  • Already taken
  • Not beginner-friendly
  • Stale or invalid
  • Something else…
  • Send Cancel
  reactions student project

  Difficulty 4/5 3-5 days Newbie friendliness 42/100

  AMReX-Astro/Microphysics#1333 · Opened Sep 12, 2023

  Maintainers usually reply within 1 day

• Compile-time RHS evaluation should have a pretty print option

  May be free again @maximumcats claimed this 1137 days ago, and no pull request is open. Open

  ⋯Report a problem with this issue

  • Is something wrong?

  • Already taken
  • Not beginner-friendly
  • Stale or invalid
  • Something else…
  • Send Cancel
  enhancement reactions

  AMReX-Astro/Microphysics#1324 · 1 assignee · Opened Sep 9, 2023

  Maintainers usually reply within 1 day

• can we operator split within VODE?

  Open

  ⋯Report a problem with this issue

  • Is something wrong?

  • Already taken
  • Not beginner-friendly
  • Stale or invalid
  • Something else…
  • Send Cancel
  integrator

  Difficulty 5/5 Over a week Newbie friendliness 25/100

  AMReX-Astro/Microphysics#1314 · 1 comment · Opened Aug 19, 2023

  Maintainers usually reply within 1 day

• regenerate the helmtable without needing std::log10

  Open

  ⋯Report a problem with this issue

  • Is something wrong?

  • Already taken
  • Not beginner-friendly
  • Stale or invalid
  • Something else…
  • Send Cancel
  EOS

  Difficulty 5/5 Over a week Newbie friendliness 25/100

  AMReX-Astro/Microphysics#1258 · 3 comments · Opened Jul 5, 2023

  Maintainers usually reply within 1 day

• what's the purpose of integrate_energy now?

  Open

  ⋯Report a problem with this issue

  • Is something wrong?

  • Already taken
  • Not beginner-friendly
  • Stale or invalid
  • Something else…
  • Send Cancel
  integrator

  Difficulty 4/5 3-5 days Newbie friendliness 30/100

  AMReX-Astro/Microphysics#1215 · 1 comment · Opened Jun 13, 2023

  Maintainers usually reply within 1 day

• switch Strang integration to work with (rho X, rho e)

  Open

  ⋯Report a problem with this issue

  • Is something wrong?

  • Already taken
  • Not beginner-friendly
  • Stale or invalid
  • Something else…
  • Send Cancel
  integrator

  Difficulty 4/5 3-5 days Newbie friendliness 35/100

  AMReX-Astro/Microphysics#1200 · 3 comments · Opened May 31, 2023

  Maintainers usually reply within 1 day

• reintroduce the idea of multiple integrators

  Open

  ⋯Report a problem with this issue

  • Is something wrong?

  • Already taken
  • Not beginner-friendly
  • Stale or invalid
  • Something else…
  • Send Cancel
  integrator

  Difficulty 5/5 Over a week Newbie friendliness 25/100

  AMReX-Astro/Microphysics#1197 · 1 reaction · Opened May 24, 2023

  Maintainers usually reply within 1 day

• consider changing rhs() interface in integrator to pass y instead of integrator type

  Open

  ⋯Report a problem with this issue

  • Is something wrong?

  • Already taken
  • Not beginner-friendly
  • Stale or invalid
  • Something else…
  • Send Cancel
  integrator

  Difficulty 4/5 3-5 days Newbie friendliness 35/100

  AMReX-Astro/Microphysics#1192 · 2 comments · Opened May 21, 2023

  Maintainers usually reply within 1 day

• implement an XRB network based on Rembges et al.

  Open

  ⋯Report a problem with this issue

  • Is something wrong?

  • Already taken
  • Not beginner-friendly
  • Stale or invalid
  • Something else…
  • Send Cancel

  Difficulty 5/5 Over a week Newbie friendliness 25/100

  AMReX-Astro/Microphysics#918 · Opened Apr 13, 2022

  Maintainers usually reply within 1 day

• screening does not appear to be capped

  Open

  ⋯Report a problem with this issue

  • Is something wrong?

  • Already taken
  • Not beginner-friendly
  • Stale or invalid
  • Something else…
  • Send Cancel

  Difficulty 5/5 Over a week Newbie friendliness 25/100

  AMReX-Astro/Microphysics#911 · 3 comments · Opened Mar 20, 2022

  Maintainers usually reply within 1 day

• consider using amrex TableData for EOS tables

  Open

  ⋯Report a problem with this issue

  • Is something wrong?

  • Already taken
  • Not beginner-friendly
  • Stale or invalid
  • Something else…
  • Send Cancel
  EOS

  Difficulty 5/5 Over a week Newbie friendliness 25/100

  AMReX-Astro/Microphysics#877 · Opened Jan 27, 2022

  Maintainers usually reply within 1 day

• generation mion automatically

  Open

  ⋯Report a problem with this issue

  • Is something wrong?

  • Already taken
  • Not beginner-friendly
  • Stale or invalid
  • Something else…
  • Send Cancel
  enhancement help wanted reactions

  Difficulty 3/5 1-2 days Newbie friendliness 42/100

  AMReX-Astro/Microphysics#808 · Opened Nov 2, 2021

  Maintainers usually reply within 1 day

• Experiment with maximum order in VODE

  Open

  ⋯Report a problem with this issue

  • Is something wrong?

  • Already taken
  • Not beginner-friendly
  • Stale or invalid
  • Something else…
  • Send Cancel
  integrator reactions student project

  Difficulty 5/5 Over a week Newbie friendliness 25/100

  AMReX-Astro/Microphysics#797 · Opened Oct 17, 2021

  Maintainers usually reply within 1 day

• add the Potekhin and Chabrier (2010,2013) EOS

  Open

  ⋯Report a problem with this issue

  • Is something wrong?

  • Already taken
  • Not beginner-friendly
  • Stale or invalid
  • Something else…
  • Send Cancel
  EOS

  Difficulty 5/5 Over a week Newbie friendliness 25/100

  AMReX-Astro/Microphysics#788 · 3 comments · Opened Oct 15, 2021

  Maintainers usually reply within 1 day

• we should be able to query an EOS to see if an output is supported

  May be free again @zingale claimed this 1866 days ago, and no pull request is open. Open

  ⋯Report a problem with this issue

  • Is something wrong?

  • Already taken
  • Not beginner-friendly
  • Stale or invalid
  • Something else…
  • Send Cancel
  EOS hackathon

  AMReX-Astro/Microphysics#762 · 1 comment · 1 assignee · Opened Sep 7, 2021

  Maintainers usually reply within 1 day

• create a test_rhs / test_jac unit test for SDC

  Open

  ⋯Report a problem with this issue

  • Is something wrong?

  • Already taken
  • Not beginner-friendly
  • Stale or invalid
  • Something else…
  • Send Cancel
  sdc

  Difficulty 3/5 1-2 days Newbie friendliness 35/100

  AMReX-Astro/Microphysics#711 · 2 comments · Opened Jul 18, 2021

  Maintainers usually reply within 1 day

• consider adopting the Skye EOS

  Open

  ⋯Report a problem with this issue

  • Is something wrong?

  • Already taken
  • Not beginner-friendly
  • Stale or invalid
  • Something else…
  • Send Cancel
  EOS

  Difficulty 5/5 Over a week Newbie friendliness 20/100

  AMReX-Astro/Microphysics#644 · Opened Apr 6, 2021

  Maintainers usually reply within 1 day

• create a test that compares integrators

  Open

  ⋯Report a problem with this issue

  • Is something wrong?

  • Already taken
  • Not beginner-friendly
  • Stale or invalid
  • Something else…
  • Send Cancel
  hackathon integrator student project

  Difficulty 4/5 3-5 days Newbie friendliness 35/100

  AMReX-Astro/Microphysics#599 · Opened Feb 25, 2021

  Maintainers usually reply within 1 day