astro-ph.IM · 2026-08-25 · No. 95

Instrumentation and Methods for Astrophysics, 2026-08-25.

1 new papers in astro-ph.IM. Titles, authors, abstracts. Links to arXiv. Want this in your inbox every morning? Subscribe →

01 — The papers

1 entries
  1. 01

    When a neural surrogate cannot accelerate a solver: runtime share, closed-loop drift, and the economics of uncertainty gating in a stiff coupled simulation

    L. Thümmler, T. Kuroda

    astro-ph.IM · astro-ph.HE · cs.LG · physics.comp-ph

    Learned surrogates for expensive inner solver blocks are a widely pursued route to faster multiphysics simulation. We report a controlled, end-to-end negative result and identify three structural barriers, none of them a deficiency of the network we trained. The testbed is the implicit Newton solve coupling energy-dependent neutrino radiation to matter in a general-relativistic radiation-hydrodynamics code, its most expensive physics routine...

    arxiv.org/abs/2608.23075 · PDF

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