Improved measurements of the intergalactic medium temperature around quasars: possible evidence for the initial stages of He-II reionisation at z~6

S. Bolton, James; D. Becker, George; Raskutti, Sudhir; Stuart B. Wyithe, J.; G. Haehnelt, Martin; L. W. Sargent, Wallace

doi:10.1111/j.1365-2966.2011.19929.x

All Outputs (6)

Prospects for detecting the 21 cm forest from the diffuse intergalactic medium with LOFAR (2012)
Journal Article

We discuss the feasibility of the detection of the 21 cm forest in the diffuse intergalactic medium (IGM) with the radio telescope LOFAR. The optical depth to the 21 cm line has been derived using simulations of reionization which include detailed ra... Read More about Prospects for detecting the 21 cm forest from the diffuse intergalactic medium with LOFAR.

The intergalactic medium thermal history at redshift z = 1.7–3.2 from the Lyα forest: a comparison of measurements using wavelets and the flux distribution (2012)
Journal Article

We investigate the thermal history of the intergalactic medium (IGM) in the redshift interval z = 1.7–3.2 by studying the small-scale fluctuations in the Lyman α forest transmitted flux. We apply a wavelet filtering technique to 18 high-resolution qu... Read More about The intergalactic medium thermal history at redshift z = 1.7–3.2 from the Lyα forest: a comparison of measurements using wavelets and the flux distribution.

The effect of intergalactic helium on hydrogen reionization: implications for the sources of ionizing photons at z>6 (2012)
Journal Article

We investigate the effect of primordial helium on hydrogen reionization using a hydrodynamical simulation combined with the cosmological radiative transfer code CRASH. The radiative transfer simulations are performed in a 35.12 h−1 comoving Mpc box u... Read More about The effect of intergalactic helium on hydrogen reionization: implications for the sources of ionizing photons at z>6.

The Lyman α forest flux probability distribution at z>3 (2012)
Journal Article

We present a measurement of the Lyman α flux probability distribution function (PDF) obtained from a set of eight high-resolution quasar spectra with emission redshifts in the range 3.3 ≤z≤ 3.8. We carefully study the effect of metal absorption lines... Read More about The Lyman α forest flux probability distribution at z>3.

Thermal constraints on the reionization of hydrogen by Population II stellar sources (2012)
Journal Article

Improved measurements of the intergalactic medium temperature around quasars: possible evidence for the initial stages of He-II reionisation at z~6 (2012)
Journal Article

We present measurements of the intergalactic medium (IGM) temperature within ~5 proper Mpc of seven luminous quasars at z~6. The constraints are obtained from the Doppler widths of Lyman-alpha absorption lines in the quasar near-zones and build upon... Read More about Improved measurements of the intergalactic medium temperature around quasars: possible evidence for the initial stages of He-II reionisation at z~6.