Ultraviolet diversity of Little Red Dots as a probe for direct-collapse black hole ages

Name: Ultraviolet diversity of Little Red Dots as a probe for direct-collapse black hole ages
Uploaded: 2026-10-20T23:48:37.149413+00:00
Duration: 495 s
Description: The study investigates how UV emission from host galaxies in Little Red Dot candidates evolves rapidly within 30 million years after a direct-collapse black hole forms. By analyzing the UV-optical color proxy $\Delta$mag ($\log_{10} L_{5100}/L_{2500}$), researchers established three distinct phases of black hole growth, linking UV evolution to stellar mass build-up and metal enrichment.

The study investigates how UV emission from host galaxies in Little Red Dot candidates evolves rapidly within 30 million years after a direct-collapse black hole forms. By analyzing the UV-optical color proxy $\Delta$mag ($\log_{10} L_{5100}/L_{2500}$), researchers established three distinct phases of black hole growth, linking UV evolution to stellar mass build-up and metal enrichment.

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