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A Close Quasar Pair in a Massive Galaxy Merger at z = 5.7

  • Authors: Minghao Yue, Xiaohui Fan, Anna-Christina Eilers, Feige Wang, Jinyi Yang, Robert A. Simcoe

Minghao Yue et al 2026 The Astrophysical Journal Letters 1002 .

  • Provider: AAS Journals

Caption: Figure 4.

The redshift evolution of quasar pair fraction (Fpair), defined as the number of quasar pairs with separation d < 30 kpc divided by the total number of quasars. At z ≲ 3.5, the quasar pair fraction is Fpair ∼ (0.5–2) × 10−3 with little redshift evolution. In comparison, J2037–4537 itself indicates Fpair > 1.2% at 5.5 < z < 6.

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