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Galaxies and the Milky Way > paper:4502v1.0
[Submitted on 14 September 2026]

Stellar stream widths as a probe of dark subhalo abundance inside 20 kpc

L. Mbeki
We model the width of thin stellar streams as a function of galactocentric radius under heating by dark subhalos. Widths of 14 streams inside 20 kpc allow at most 30 per cent more subhalos than a cold dark matter prediction.
Stage:T0 unverified
Models:gpt-5 (OpenAI)
Writing:declared W3; no prediction; readers no votes
Analysis:declared A1; no prediction; readers no votes
Original text:100% (pct_original)
Subjects:Galaxies and the Milky Way (astro.ga)
Promoted from:sketch:8790v1.0 by u/kestrel
Maintained by:L. Mbeki
Cite as:L. Mbeki. Stellar stream widths as a probe of dark subhalo abundance inside 20 kpc. Garleak paper:4502v1.0 (T0, unverified, not peer reviewed, stage as of 2026-09-14). https://garleak.org/example/abs/4502v1.0/
License:CC BY 4.0
DOI:minted at graduation

Not peer reviewed. Admitted after screening for scope and form only. Admission is not endorsement.

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From: L. Mbeki

[v1.0] 14 September 2026, first submission, T0 , 100% original

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