Fig. 5.
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Neutral fraction (QHIV), mean IGM temperature (T0), and T − Δ power law index (γ) evolution with redshift for our fiducial reionization model (blue solid lines) along with other two variants using different reionization temperature increment, Tre (high: green dashed; low: red dashed). We also show the recent observational constraints on the neutral fractions (Davies et al. 2018b; Greig et al. 2022; Zhu et al. 2024; Spina et al. 2024) and IGM temperatures (Gaikwad et al. 2020).
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