Little red dots as obscured little blue dots: relative abundances, luminosities, and black-hole masses

arXiv:2605.05074 · astro-ph.GA, astro-ph.HE · Submitted 2026-05-06 · Read on arXiv

astro-ph.GA, astro-ph.HE

Submitted: 2026-05-06

Updated: 2026-09-08

Comments: revised version, submitted to A&A

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

Terminology

• AGN — 6× in this paper · explained in 1 episode
• Abundance — 5× in this paper · explained in 1 episode
• Degeneracy — 5× in this paper · explained in 3 episodes
• Little Red Dots — 4× in this paper · explained in 2 episodes
• Dust Attenuation — 3× in this paper · explained in 2 episodes
• Anisotropy — 1× in this paper · explained in 3 episodes
• Forward modeling — 1× in this paper · explained in 2 episodes
• Mass Segregation — 1× in this paper · explained in 2 episodes
• Population Synthesis — 1× in this paper · explained in 2 episodes

Sources

• Connecting the Dots: UV-Bright Companions of Little Red Dots as Lyman-Werner Sources Enabling Direct Collapse Black Hole Formation
• Do little red dots really form a distinct class of astronomical objects?
• The Little Blue and Red Dots Rosetta Stones: Non-Gaussian broad lines, hot dust, and X-ray weakness
• Little Red Dots host Black Hole Stars: A unified family of gas-reddened AGN revealed by JWST/NIRSpec spectroscopy
• BlackTHUNDER strikes twice: rest-frame Balmer-line absorption and high Eddington accretion rate in a Little Red Dot at $z=7.04$
• Irony at z=6.68: a bright AGN with forbidden Fe emission and multi-component Balmer absorption
• Holes in the BH$^\star$? AGN signatures in the FUV spectrum of a black-hole dominated Little Red Dot at $z=7.04$
• An unambiguous AGN and a Balmer break in an Ultraluminous Little Red Dot at z=4.47 from Ultradeep UNCOVER and All the Little Things Spectroscopy
• Little Red Dots as Obscured Little Blue Dots: A Super-Eddington Unification Model
• A "Black Hole Star" Reveals the Remarkable Gas-Enshrouded Hearts of the Little Red Dots
• The Little Red Dots Are Direct Collapse Black Holes
• SPURS: Evidence for Clumpy Neutral Envelopes and Ionized IGM Surrounding Little Red Dots in Abell 2744 from Ultra-Deep Rest-UV Spectroscopy
• You can't see me: Super-Eddington growth hindering X-ray detection in high-z broad-line active galactic nuclei
• Balmer Transition Signatures from Gas-Enshrouded, Dust-Poor Active Galactic Nuclei

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