788 citations · 4.3k across the 27 of their papers we have counts for
27 papers
Improved measurements of the intergalactic medium temperature around quasars: possible evidence for the initial stages of He-II reionisation at z~6
James S. Bolton, George D. Becker, Sudhir Raskutti +3
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…
Detection of Extended He II Reionization in the Temperature Evolution of the Intergalactic Medium
George D. Becker, James S. Bolton, Martin G. Haehnelt +1
We present new measurements of the temperature of the intergalactic medium (IGM) derived from the Lyman-alpha forest over 2.0 < z < 4.8. The small-scale structure in the forest of…
A first direct measurement of the intergalactic medium temperature around a quasar at z=6
James S. Bolton, George D. Becker, J. Stuart B. Wyithe +2
The thermal state of the intergalactic medium (IGM) provides an indirect probe of both the HI and HeII reionisation epochs. Current constraints on the IGM temperature from the Lya…
The UV spectrum of HS1700+6416 I. Predicting the metal line content of the far UV spectrum
C. Fechner, D. Reimers, A. Songaila +3
In preparation of a study of the HeII/HI ratio towards the bright QSO HS1700+6416, we predict the metal line content of the far-UV spectral range by modelling 18 metal absorption l…
X-ray Spectral Survey with XMM--Newton of a Complete Sample of Nearby Seyfert Galaxies
M. Cappi, F. Panessa, L. Bassani +15
Results obtained from an X-ray spectral survey of nearby Seyfert galaxies using XMM--Newton are reported. The sample was optically selected, well defined, complete in B mag, and di…
Properties of QSO Metal Line Absorption Systems at High Redshifts: Nature and Evolution of the Absorbers and the Ionizing Radiation Background
Alec Boksenberg, Wallace L. W. Sargent, Michael Rauch
In Keck HIRES spectra of 9 QSOs we identify a sample of 908 CIV absorber components in 188 systems outside the Lyman forest in the redshift range 1.6 < z < 4.4, with related lines…