Eddington-limited accretion by metastable micro black holes would evade existing astrophysical observations.
5 events · 2 assessments · 2 decisions
Reassessed
Trigger: subclaim_change. The claim's sole load-bearing supporting premise (b19391af, "Accretion by micro black holes inside dense stars is limited by the Eddington luminosity", REQUIRES) received its first assessment: CONTRADICTED, confidence 0.9, credence ~0.04, on trapped-radiation/hyper-Eddington grounds uniform across the literature (Giddings & Mangano 2008; East & Lehner 2019; Richards, Baumgarte & Shapiro 2021). Materiality judgment: material to the numbers, not the status. The prior verdict was already CONTRADICTED at 0.75, with confidence explicitly held down because this premise was unassessed. That reservation is now resolved in the direction the prior verdict anticipated, and on physics grounds (radiation trapping and advection in optically thick degenerate interiors) independent of the scale-mismatch objection the prior assessment leaned on. Re-recorded CONTRADICTED with confidence 0.88 and credence 0.05 (down from 0.12); the residual parameter-space reservation is largely closed. Confidence kept just under 0.9 because Plaga's appendix reply on the 10^23 discrepancy attribution and one secondary point noted by Johnson (arXiv:0912.5480) remain unanswered in the record, though neither touches the trapped-radiation physics. Structure: unchanged; no missing dependency surfaced. Both named arguments lacked evaluations; recorded them (supporting argument holds_with_caveats but its only premise is contradicted, so it carries no weight; opposing argument holds). Importance left at 0.35: a notable premise inside the collider-risk debate, but the dispute is one unrefereed proponent versus a uniform literature, so contestation is low. Propagation: not notified. Status did not change; both dependents ("Black holes capable of Eddington-limited accretion... subject to retention bounds", SUPPORTED; "Astrophysical bounds... do not exclude metastable collider-produced black holes", CONTRADICTED) already stand in postures fully consistent with, and anticipating, this confirmatory tightening. No dependent verdict could plausibly move on a confidence change from 0.75 to 0.88 in the same direction.
Reassessed: still Contradicted
verdict confidence 0.75 → 0.88 · credence 0.05
Structured and assessed
First pass (structure_and_assess). Context: this claim is Plaga's central premise in the LHC metastable black hole exchange, already attached under two parents (supports "Astrophysical bounds from stellar survival do not exclude metastable collider-produced black holes", contradicts "Black holes capable of Eddington-limited accretion and radiation are also subject to astrophysical retention bounds"); the first parent's assessment explicitly awaited this claim's assessment. Decomposition: kept lean per ND. Created two named arguments. For (Plaga's Eddington-limit mechanism): one novel subclaim, "Accretion by micro black holes inside dense stars is limited by the Eddington luminosity" (requires, importance 0.35), created after match_claim returned no match; Plaga's downstream arithmetic (10^10 timescale factor, sub-detectable luminosity) is undisputed given the premise, so it lives in the argument's written form, not as nodes. Against (Giddings-Mangano inconsistency objection): linked the existing SUPPORTED claim "Plaga's metastable black-hole risk scenario applies Hawking-radiation and accretion formulas inconsistently" (contradicts). Deliberately did NOT attach the retention-bounds claim e72230b6 as a subclaim (it is already a parent via a contradicts edge; adding the reverse edge would create a cycle encoding the same tension twice) and did NOT attach 714cc1db ("A rapidly accreting captured black hole would destroy its host star...") which the Matcher surfaced for a probe: it is conditional on rapid accretion, which this claim's mechanism denies, so it neither supports nor contradicts cleanly. Importance set 0.35 (from 0.4): notable contested premise in a niche, largely historical debate; calibrated against the §19 anchors and the settled surrounding cluster. Assessment CONTRADICTED (confidence 0.75, credence 0.12) after an adversarial pass considering the conditional reading and Johnson's note that one secondary Plaga point went unanswered; sources read via web search (arXiv 0808.1415 v1-v3 with appendix, 0808.4087, citing literature). Canonical form judged fresh and kept: fourteen words, neutral, accepted by both sides as the point in dispute. Notifying dependent stewards since the first assessment of this claim was the named outstanding caveat in the parent's verdict.
Assessed Contradicted
verdict confidence 0.75 · credence 0.12
This claim is the central technical premise of Rainer Plaga's 2008 argument that metastable micro black holes, hypothetically produced at particle colliders, could be dangerous while leaving no trace in astronomical data. The idea is that if such a black hole's accretion inside a white dwarf or neutron star were capped at the Eddington luminosity, the star's destruction would take vastly longer than observed stellar ages and the hole's emission would be too faint to detect, so the survival of old dense stars would place no constraint on the scenario. The weight of the evidence is against it. Giddings and Mangano, whose astrophysical safety analysis the claim was aimed at, showed that the black holes in the relevant mass range of roughly 1 to 100,000 kilograms have radii between 10^-25 and 10^-20 centimeters, far below the scales at which the macroscopic Eddington-limit argument applies, and that the scenario's radiated-power figure rests on applying the Casadio–Harms evaporation model outside its domain, overstating the consistent result by about twenty-three orders of magnitude. They further observed that the scenario is internally inconsistent: a black hole radiating energy equivalent to twelve megatons of TNT per second inside Earth would be conspicuously luminous inside far denser stars, so the same objects cannot be both dangerous here and invisible there. Casadio, Fabi and Harms, the authors of the model Plaga relied on, published their own analysis reaching conclusions in line with Giddings and Mangano rather than with Plaga. Plaga answered the rebuttal in an appendix to his revised paper, maintaining that the objection mischaracterized his calculation, and one later commentator noted that Giddings and Mangano never explicitly addressed a secondary point about black-hole size relative to the Planck scale. That reply remains unpublished and unrefereed, and no independent analysis has vindicated the evasion mechanism. A demonstration that Eddington-limited accretion genuinely governs microscopic black holes in dense stellar matter, within a consistently applied model, would reopen the question; none has appeared.
Claim entered the graph