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Cited by 303

The DOI matches its Crossref record; 99 of the 99 references it cites were found in a registry or an index.

Hydrogen reionization ends by z = 5.3: Lyman-α optical depth measured by the XQR-30 sample

Open access
Bosman, Sarah E I, Davies, Frederick B, Becker, George D, Keating, Laura C, Davies, Rebecca L, Zhu, Yongda, Eilers, Anna-Christina, D’Odorico, Valentina, Bian, Fuyan, Bischetti, Manuela, Cristiani, Stefano V, Fan, Xiaohui, Farina, Emanuele P, Haehnelt, Martin G, Hennawi, Joseph F, Kulkarni, Girish, Mesinger, Andrei, Meyer, Romain A, Onoue, Masafusa, Pallottini, Andrea, Qin, Yuxiang, Ryan-Weber, Emma, Schindler, Jan-Torge, Walter, Fabian, Wang, Feige, Yang, Jinyi·2022·Monthly Notices of the Royal Astronomical Society
DOI 10.1093/mnras/stac1046
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Abstract

The presence of excess scatter in the Ly-α forest at z ∼ 5.5, together with the existence of sporadic extended opaque Gunn-Peterson troughs, has started to provide robust evidence for a late end of hydrogen reionization. However, low data quality and systematic uncertainties complicate the use of Ly-α transmission as a precision probe of reionization’s end stages. In this paper, we assemble a sample of 67 quasar sightlines at z > 5.5 with high signal-to-noise ratios of >10 per ≤15 km s−1 spectral pixel, relying largely on the new XQR-30 quasar sample. XQR-30 is a large program on VLT/X-Shooter which obtained deep (SNR > 20 per pixel) spectra of 30 quasars at z > 5.7. We carefully account for systematics in continuum reconstruction, instrumentation, and contamination by damped Ly-α systems. We present improved measurements of the mean Ly-α transmission over 4.9 < z < 6.1. Using all known systematics in a forward modelling analysis, we find excellent agreement between the observed Ly-α transmission distributions and the homogeneous-UVB simulations Sherwood and Nyx up to z ≤ 5.2 (<1σ), and mild tension (∼2.5σ) at z = 5.3. Homogeneous UVB models are ruled out by excess Ly-α transmission scatter at z ≥ 5.4 with high confidence (>3.5σ). Our results indicate that reionization-related fluctuations, whether in the UVB, residual neutral hydrogen fraction, and/or IGM temperature, persist in the intergalactic medium until at least z = 5.3 (t = 1.1 Gyr after the big bang). This is further evidence for a late end to reionization.

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Metadata

Authors
Bosman, S. E. I., Davies, F. B., Becker, G. D., Keating, L. C., Davies, R. L., Zhu, Y., Eilers, A.-C., D’Odorico, V., Bian, F., Bischetti, M., Cristiani, S. V., Fan, X., Farina, E. P., Haehnelt, M. G., Hennawi, J. F., Kulkarni, G., Mesinger, A., Meyer, R. A., Onoue, M., Pallottini, A., Qin, Y., Ryan-Weber, E., Schindler, J.-T., Walter, F., Wang, F., & Yang, J.
Venue
Monthly Notices of the Royal Astronomical Society
Publisher
Oxford University Press (OUP)
Published
2022-06-07
Volume
514
Issue
1
Pages
55-76
ISSN
  • 0035-8711 (ISSN-L)
  • 1365-2966
DOI
10.1093/mnras/stac1046
OpenAlex
W4225921670
Cited by
303
References
99
FWCI
25.58
Type
journal article
Language
en
Open access
hybrid

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The paper
Bosman, S. E. I., Davies, F. B., Becker, G. D., Keating, L. C., Davies, R. L., Zhu, Y., Eilers, A.-C., D’Odorico, V., Bian, F., Bischetti, M., Cristiani, S. V., Fan, X., Farina, E. P., Haehnelt, M. G., Hennawi, J. F., Kulkarni, G., Mesinger, A., Meyer, R. A., Onoue, M., . . . Yang, J. (2022). Hydrogen reionization ends by z = 5.3: Lyman-α optical depth measured by the XQR-30 sample. Monthly Notices of the Royal Astronomical Society. https://doi.org/10.1093/mnras/stac1046

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

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