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No Luminous Little Red Dots: A Sharp Cutoff in Their Luminosity Function

  • Authors: Yilun Ma, 逸伦 马, Jenny E. Greene, Marta Volonteri, Andy D. Goulding, David J. Setton, Marianna Annunziatella, Eiichi Egami, Xiaohui Fan, Vasily Kokorev, Ivo Labbe, Xiaojing Lin, Danilo Marchesini, Jorryt Matthee, Themiya Nanayakkara, Luke Robbins, Anna Sajina, Marcin Sawicki

Yilun Ma et al 2026 The Astrophysical Journal Letters 1008 .

  • Provider: AAS Journals

Caption: Figure 4.

A schematic cartoon showing how different combinations of black hole mass functions and Eddington ratio distributions of the LRDs (red) and quasars (blue) affect the shapes of the LFs. The first row is our fiducial model, where LRDs represent a population of low-mass black holes with high Eddington ratio and small scatter in the Eddington ratio distribution. For the quasars, the QLF is extrapolated below an observed limit and marked with the dashed curve. This figure is entirely demonstrative and should mostly be taken qualitatively.

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