KBC Void (local under-density) is catalogued in this registry as a structure, held in the frame of CMB Rest Frame, from Large-scale structures (curated).
Registry id LSS_KBC_VOID ·
source layer largescale ·
provenance PROCESSED — derived deterministically from source catalogues (unit, frame and epoch conversions, cross-source reconciliation) — no value invented
Open KBC Void (local under-density) in the live scene → The scene composes a position for any date and is where a figure becomes a picture. It downloads the whole catalogue first: measured against the built product, an object outside the core resolves after about 16 s over a local network and about 147 s over a 4 Mbit link, having transferred roughly 70 MB. If you cannot wait that long, this page is the answer.
| Kind | structure |
|---|---|
| Origin | natural |
Large-scale structure — void. placed at the origin (we are inside it). Anchor: centred approximately on the local volume — we are inside it (placed at the origin). Extent: "a ~300 Mpc scale under-density in the local galaxy distribution" (the paper's title, verbatim). The Keenan–Barger–Cowie under-density: K-band galaxy counts show the local universe (z < 0.07) under-dense relative to z > 0.1 by a factor ~1.5 in luminosity density. [Keenan et al. 2013]
Reproduced as the source wrote it. Author-year citations link to their DOI where one is registered.
These are absences in the catalogues aggregated here, not measurements of zero, and not statements that the quantity is unknown to science:
| Database | Large-scale structures (curated) |
|---|---|
| Authority | Published cosmography (Tully et al. 2014 Laniakea; de Vaucouleurs 1953; Raychaudhury 1989; Haynes & Giovanelli 1986; Lynden-Bell et al. 1988; Geller & Huchra 1989; Gott et al. 2005; Horváth et al. 2014/2015 + Ukwatta & Woźniak 2016; Kirshner et al. 1981/1987; Tully et al. 2008/2019; Keenan et al. 2013; Tully 1986 + Einasto et al. 1997; Pomarède et al. 2020; Clowes et al. 2013), anchors via SIMBAD/NED |
| Licence | Public astronomical facts (positions/redshifts/extents), per-record citations |
| How it entered | Curated data-as-code (src/ingest/catalogs/largescale.ts) |
| Coverage | 14 landmark structures above the galaxy-cluster scale — superclusters (Laniakea · Virgo/Local · Shapley · Perseus-Pisces · Pisces-Cetus complex), walls (CfA2 · Sloan · South Pole · the contested Hercules-Corona Borealis, shown with its published rebuttal), voids (Boötes · Local · KBC) + the Great Attractor and the Huge-LQG. Distances from z/cz are MODELLED through the flat-ΛCDM door (Planck 2018) and labelled; cosmological recession is the expansion of space, not motion through space — no drift is modelled |
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