Work

Primordial Black Hole Spin at Formation Under a Shear Bound

Year: 2026

Type: article

Abstract: Primordial black holes are expected to be born spinning slowly. Unlike stellar collapse, which concentrates the angular momentum of a rotating star, primordial collapse begins from a nearly spherical overdensity in an expanding universe, and acquires rotation only from the tidal torques and anisotropies present at horizon crossing. The headline computed values are: mean a cap = 0.082; high spin frac cap = 0.00e+00; high spin frac nocap = 1.08e-03. This is a simulated and computed study, not a measurement; the code and outputs are deposited alongside the text.

Source: Zenodo (CERN European Organization for Nuclear Research)

DOI: 10.5281/zenodo.24147770

Author: Aldred, William Alexander

Language: English

Topic: Cosmology and Gravitation Theories

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W7225792737

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