Chronicling the reionization history at 6≲ z ≲ 7 with emergent quasar damping wings
The Astrophysical Journal(2024)
摘要
The spectra of high-redshift (z≳ 6) quasars contain valuable
information on the progression of the Epoch of Reionization (EoR). At redshifts
z<6, the observed Lyman-series forest shows that the intergalactic medium
(IGM) is nearly ionized, while at z>7 the observed quasar damping wings
indicate high neutral gas fractions. However, there remains a gap in neutral
gas fraction constraints at 6≲ z ≲ 7 where the Lyman series
forest becomes saturated but damping wings have yet to fully emerge. In this
work, we use a sample of 18 quasar spectra at redshifts 6.0更多
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关键词
Quasars,Supermassive black holes,Reionization,Intergalactic medium,Intergalactic gas
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