A weighted mix of quantum-chemically computed PAH absorption spectra reproduces the 2263 Å UV bump in JADES-GS-z6-0, implying PAHs were already pervasive at z≈6.71.
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Polycyclic Aromatic Hydrocarbon and the Ultraviolet Extinction Bump at the Cosmic Dawn
A weighted mix of quantum-chemically computed PAH absorption spectra reproduces the 2263 Å UV bump in JADES-GS-z6-0, implying PAHs were already pervasive at z≈6.71.