All Outputs (9)

Constraining the temperature–density relation of the intergalactic medium with the Lyman α and β forests (2015)
Journal Article
Boera, E., Murphy, M. T., Becker, G. D., & Bolton, J. S. (2016). Constraining the temperature–density relation of the intergalactic medium with the Lyman α and β forests. Monthly Notices of the Royal Astronomical Society, 456(1), L79-L83. https://doi.org/10.1093/mnrasl/slv172

The post-reionization thermal state of the intergalactic medium is characterized by a power-law relationship between temperature and density, with a slope determined by the parameter γ. We describe a new method to measure γ using the ratio of flux cu... Read More about Constraining the temperature–density relation of the intergalactic medium with the Lyman α and β forests.

Reionisation and High-Redshift Galaxies: The View from Quasar Absorption Lines (2015)
Journal Article
Becker, G. D., Bolton, J. S., & Lidz, A. (2015). Reionisation and High-Redshift Galaxies: The View from Quasar Absorption Lines. Publications of the Astronomical Society of Australia, 32, Article e045. https://doi.org/10.1017/pasa.2015.45

Determining when and how the first galaxies reionised the intergalactic medium promises to shed light on both the nature of the first objects and the cosmic history of baryons. Towards this goal, quasar absorption lines play a unique role by probing... Read More about Reionisation and High-Redshift Galaxies: The View from Quasar Absorption Lines.

Gas around galaxy haloes – II. Hydrogen absorption signatures from the environments of galaxies at redshifts 2 (2015)
Journal Article
Tittley, E. R., Meiksin, A., Bolton, J. S., & Tittley, E. (2015). Gas around galaxy haloes – II. Hydrogen absorption signatures from the environments of galaxies at redshifts 2. Monthly Notices of the Royal Astronomical Society, 453(1), 899-913. https://doi.org/10.1093/mnras/stv1682

We compare predictions of large-scale cosmological hydrodynamical simulations for neutral hydrogen absorption signatures in the vicinity of 1011–1012.5 M⊙ haloes with observational measurements. Two different hydrodynamical techniques and a variety o... Read More about Gas around galaxy haloes – II. Hydrogen absorption signatures from the environments of galaxies at redshifts 2.

Simulating the 21cm forest detectable with LOFAR and SKA in the spectra of high-zGRBs (2015)
Journal Article
Schaye, J., Jelić, V., Bolton, J. S., Ciardi, B., Inoue, S., Abdalla, F. B., …Zaroubi, S. (2015). Simulating the 21cm forest detectable with LOFAR and SKA in the spectra of high-zGRBs. Monthly Notices of the Royal Astronomical Society, 453(1), 101-105. https://doi.org/10.1093/mnras/stv1640

We investigate the feasibility of detecting 21 cm absorption features in the afterglow spectra of high redshift long Gamma Ray Bursts (GRBs). This is done employing simulations of cosmic reionization, together with estimates of the GRB radio afterglo... Read More about Simulating the 21cm forest detectable with LOFAR and SKA in the spectra of high-zGRBs.

Lyman α emitters gone missing: evidence for late reionization? (2015)
Journal Article
Choudhury, T. R., Puchwein, E., Haehnelt, M. G., & Bolton, J. S. (2015). Lyman α emitters gone missing: evidence for late reionization?. Monthly Notices of the Royal Astronomical Society, 452(1), 261-277. https://doi.org/10.1093/mnras/stv1250

We combine high resolution hydrodynamical simulations with an intermediate resolution, dark matter only simulation and an analytical model for the growth of ionized regions to estimate the large scale distribution and redshift evolution of the visibi... Read More about Lyman α emitters gone missing: evidence for late reionization?.

The photoheating of the intergalactic medium in synthesis models of the UV background (2015)
Journal Article
Puchwein, E., Bolton, J. S., Haehnelt, M. G., Madau, P., Becker, G. D., & Haardt, F. (2015). The photoheating of the intergalactic medium in synthesis models of the UV background. Monthly Notices of the Royal Astronomical Society, 450(4), 4081-4097. https://doi.org/10.1093/mnras/stv773

We compare cosmological hydrodynamical simulations combined with the homogeneous metagalactic UV background (UVB) of Haardt & Madau (2012) (HM2012) to observations of the Lyman-alpha forest that are sensitive to the thermal and ionization state of th... Read More about The photoheating of the intergalactic medium in synthesis models of the UV background.

IGM constraints from the SDSS-III/BOSS DR9 Lyα forest transmission probability distribution function (2015)
Journal Article
Lee, K. G., Lee, K.-G., Hennawi, J., Spergel, D. N., Weinberg, D. H., Hogg, D. W., …Yeche, C. (2015). IGM constraints from the SDSS-III/BOSS DR9 Lyα forest transmission probability distribution function. Astrophysical Journal, 799(2), 196. https://doi.org/10.1088/0004-637X/799/2/196

© 2015. The American Astronomical Society. All rights reserved. The Lyα forest transmission probability distribution function (PDF) is an established probe of the intergalactic medium (IGM) astrophysics, especially the temperature-density relationshi... Read More about IGM constraints from the SDSS-III/BOSS DR9 Lyα forest transmission probability distribution function.

Evidence of patchy hydrogen reionization from an extreme Lyα trough below redshift six (2015)
Journal Article
Becker, G. D., Bolton, J. S., Madau, P., Pettini, M., Ryan-Weber, E. V., & Venemans, B. P. (2015). Evidence of patchy hydrogen reionization from an extreme Lyα trough below redshift six. Monthly Notices of the Royal Astronomical Society, 447(4), 3402-3419. https://doi.org/10.1093/mnras/stu2646

© 2015 The Authors. We report the discovery of an extremely long (~110 Mpc h -1 ) and dark (τ eff ≳ 7) Lyα trough extending down to z ≃ 5.5 towards the z em ≃ 6.0 quasar ULAS J0148+0600. We use these new data in combination with Lya forest measureme... Read More about Evidence of patchy hydrogen reionization from an extreme Lyα trough below redshift six.

The impact of temperature fluctuations on the large-scale clustering of the Lyα forest (2015)
Journal Article
Greig, B., Bolton, J. S., & Wyithe, J. S. B. (2015). The impact of temperature fluctuations on the large-scale clustering of the Lyα forest. Monthly Notices of the Royal Astronomical Society, 447(3), 2503-2511. https://doi.org/10.1093/mnras/stu2624

We develop a semi-analytic method for assessing the impact of the large-scale IGM temperature fluctuations expected following He ii reionization on three-dimensional clustering measurements of the Lyα forest. Our methodology builds upon the existing... Read More about The impact of temperature fluctuations on the large-scale clustering of the Lyα forest.