Journal article
IGM damping wing constraints on reionization from covariance reconstruction of two z ≳ 7 QSOs
B Greig, A Mesinger, FB Davies, F Wang, J Yang, JF Hennawi
Monthly Notices of the Royal Astronomical Society | Published : 2022
Abstract
Bright, high-redshift (z > 6) QSOs are powerful probes of the ionization state of the intervening intergalactic medium (IGM). The detection of Ly α damping wing absorption imprinted in the spectrum of high-z QSOs can provide strong constraints on the epoch of reionization (EoR). In this work, we perform an independent Ly α damping wing analysis of two known z > 7 QSOs; DESJ0252-0503 at z = 7.00 (Wang et al.) and J1007+2115 at z = 7.51 (Yang et al.). For this, we utilize our existing Bayesian framework which simultaneously accounts for uncertainties in: (i) the intrinsic Ly α emission profile (reconstructed from a covariance matrix of measured emission lines; extended in this work to include ..
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Grants
Awarded by Horizon 2020 Framework Programme
Funding Acknowledgements
We thank the anonymous referee for their comments, Aaron Barth for providing the Keck NIRES data and both Aaron Barth and Xiaohiu Fan for reading an early version of this manuscript. We thank Yuxiang Qin for providing the reionization history posteriors. Parts of this research were supported by the Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D), through project number CE170100013. AM acknowledges funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme (grant agreement No 638809 - AIDA). The results presented here reflect the authors' views; the ERC is not responsible for their use. FW acknowledge the support provided by NASA through the NASA Hubble Fellowship grant #HST-HF2- 51448.001-A awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Incorporated, under NASA contract NAS5-26555.