The Viscosity Is a Band: The Urca Profile of a Merger Remnant, Derived as a Resonance

The Urca bulk viscosity assumed in Chabanov & Rezzolla (2307.10464) is derived as a resonance profile from the reaction rate laws: half-maximum temperature bands of factor 1.93 (direct Urca) and 1.55 (modified Urca), band addresses stable to <1.8x under 10x rate errors, and the two channels shown non-overlapping (modified Urca at <=1.3e-3 of its peak wherever direct Urca resonates).

Authors

Publication Details

Journal
Zenodo (CERN European Organization for Nuclear Research)
Published
2026-11-02
DOI
https://doi.org/10.5281/zenodo.23926383
Primary Topic
Pulsars and Gravitational Waves Research
Type
preprint
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preprint

The Viscosity Is a Band: The Urca Profile of a Merger Remnant, Derived as a Resonance

William Alexander Aldred
Zenodo (CERN European Organization for Nuclear Research)
Pulsars and Gravitational Waves Research
preprint

The Viscosity Is a Band: The Urca Profile of a Merger Remnant, Derived as a Resonance

William Alexander Aldred
preprint en

Abstract

The Urca bulk viscosity assumed in Chabanov & Rezzolla (2307.10464) is derived as a resonance profile from the reaction rate laws: half-maximum temperature bands of factor 1.93 (direct Urca) and 1.55 (modified Urca), band addresses stable to <1.8x under 10x rate errors, and the two channels shown non-overlapping (modified Urca at <=1.3e-3 of its peak wherever direct Urca resonates).

Zenodo (CERN European Organization for Nuclear Research)
Pulsars and Gravitational Waves Research
DOIOpen Access PDFOpenAlex
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The Viscosity Is a Band: The Urca Profile of a Merger Remnant, Derived as a Resonance — William Alexander Aldred · Zenodo (CERN European Organization for Nuclear Research) (2026) | TGRS Research Map | TGRS