Browsing Faculty of Natural and Agricultural Sciences by Subject "Galaxies: high-redshift"
Now showing items 1-3 of 3
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Carbon-loud SDSS BOSS type II quasars at z > 2: high-density gas or secondary production of carbon?
(Oxford Univ Press, 2020)We study the ultraviolet (UV) emission-line ratios of a sample of 145 type II quasars (QSO2s) from Sloan Digital Sky Survey III Baryon Oscillation Spectroscopic Survey, and compare against a grid of active galactic nucleus ... -
Detection of large-scale Ly α absorbers at large angles to the radio axis of high-redshift radio galaxies using SOAR
(Oxford Univ Press, 2018)We present an investigation of the properties of the extended Ly α halo and the large-scale H I absorbing structures associated with five high-redshift radio galaxies at z > 2, using the Goodman long-slit spectrograph ... -
Very high energy γ-ray emission from two blazars of unknown redshift and upper limits on their distance
(Oxford Univ Press, 2020)We report on the detection of very high energy (VHE; E > 100 GeV) γ-ray emission from the BL Lac objects KUV 00311−1938 and PKS 1440−389 with the High Energy Stereoscopic System (H.E.S.S.). H.E.S.S. observations were ...