SIMBAD references

2021ApJ...923..223Z - Astrophys. J., 923, 223-223 (2021/December-3)

Chasing the tail of cosmic reionization with dark gap statistics in the Lyα forest over 5 < z < 6.

ZHU Y., BECKER G.D., BOSMAN S.E.I., KEATING L.C., CHRISTENSON H.M., BANADOS E., BIAN F., DAVIES F.B., D'ODORICO V., EILERS A.-C., FAN X., HAEHNELT M.G., KULKARNI G., PALLOTTINI A., QIN Y., WANG F. and YANG J.

Abstract (from CDS):

We present a new investigation of the intergalactic medium (IGM) near the end of reionization using "dark gaps" in the Lyα forest. Using spectra of 55 QSOs at zem > 5.5, including new data from the XQR-30 VLT Large Programme, we identify gaps in the Lyα forest where the transmission averaged over 1 comoving h–1 Mpc bins falls below 5%. Nine ultralong (L > 80 h–1 Mpc) dark gaps are identified at z < 6. In addition, we quantify the fraction of QSO spectra exhibiting gaps longer than 30 h–1 Mpc, F30, as a function of redshift. We measure F30 ≃ 0.9, 0.6, and 0.15 at z = 6.0, 5.8, and 5.6, respectively, with the last of these long dark gaps persisting down to z ≃5.3. Comparing our results with predictions from hydrodynamical simulations, we find that the data are consistent with models wherein reionization extends significantly below redshift six. Models wherein the IGM is essentially fully reionized that retain large-scale fluctuations in the ionizing UV background at z <=6 are also potentially consistent with the data. Overall, our results suggest that signatures of reionization in the form of islands of neutral hydrogen and/or large-scale fluctuations in the ionizing background remain present in the IGM until at least z ≃ 5.3.

Abstract Copyright: © 2021. The American Astronomical Society. All rights reserved.

Journal keyword(s): Reionization - Intergalactic medium - Quasar absorption line spectroscopy - High-redshift galaxies

Status at CDS : Large table(s) will be appraised for possible ingestion in VizieR.

CDS comments: Table 1: PSO J065+01 was not identified.

Simbad objects: 55

goto Full paper

goto View the references in ADS

To bookmark this query, right click on this link: simbad:2021ApJ...923..223Z and select 'bookmark this link' or equivalent in the popup menu


2023.01.28-04:03:47

© Université de Strasbourg/CNRS

    • Contact