Nonlinear Collapse with a Matched Q-Interaction Sector: Constraint-Satisfying Data and an Exact Future-Trapping Threshold
Year: 2026
Type: preprint
Abstract: This preprint couples a matched Q-interaction matter law to Einstein gravity in spherical symmetry. It constructs smooth initial data with a homogeneous closed core and an expanding cosmological exterior and derives the future null expansions in the causal domain of the core. For a specified sphere and conformal-time deadline, the solution yields an exact threshold at initial quadratic energy fraction f = 2/3. The result applies to the stated initial-data family and gives an analytic benchmark for nonlinear collapse.
Author: SIGERGOK, Hasan
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7225829886
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