More Numerous and Bluer: Companions of the Brightest Little Red Dots Differ from Control Galaxies at >3 sigma, Hinting at Synchronized Black Hole Seed Formation

arXiv:2608.23671 · astro-ph.GA, astro-ph.CO, astro-ph.HE · Submitted 2026-08-24 · Read on arXiv

astro-ph.GA, astro-ph.CO, astro-ph.HE

Submitted: 2026-08-24

Updated: 2026-09-21

Comments: Accepted for publication in The Astrophysical Journal Letters. 11 pages, 4 figures

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• Little Red Dots — 8× in this paper · explained in 2 episodes
• Aperture — 5× in this paper · explained in 1 episode
• Calibration — 3× in this paper · explained in 7 episodes
• Clustering — 2× in this paper · explained in 2 episodes
• Little Red Dots (LRDs) — 2× in this paper · explained in 3 episodes
• Abundance — 1× in this paper · explained in 1 episode
• Aperture Photometry — 1× in this paper · explained in 1 episode
• Gravitational Lensing — 1× in this paper · explained in 2 episodes
• James Webb Space Telescope — 1× in this paper
• Trace — 1× in this paper · explained in 2 episodes

Sources

• Double Dots: Compact Pairs Mark Little Red Dots and High-Redshift Broad-line AGNs
• A Rapid Evolution in the Observed Mbh/M* Relation at z > 3 Revealed via Spectro-photometric SED-Modeling
• The $M_{\rm BH}-M_{*}$ Relationship at $3<z<7$: Big Black Holes in Little Red Dots
• Emission line formation in scattering dominated media: implications for LRDs
• A "Black Hole Star" Reveals the Remarkable Gas-Enshrouded Hearts of the Little Red Dots
• The Little Red Dots Are Direct Collapse Black Holes

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