the Gunn–Peterson trough is a feature of the spectra of quasars due to the presence of neutral hydrogen in the Intergalactic medium (IGM). The trough is...

Gunn-Peterson trough (though they may show the Lyman-alpha forest), while quasars emitting light prior to reionization will feature a Gunn-Peterson trough...

presence of dark matter in galaxies, and predicted the existence of a Gunn–Peterson trough in the spectra of distant quasars. Cosmology may look like a science...

should be absorbed by the neutral hydrogen. The effect, called the Gunn–Peterson trough, should yield zero emission at wavelengths shorter than 1216 angstroms...

reionization. The oldest known quasars (z = 6)[needs update] display a Gunn–Peterson trough and have absorption regions in front of them indicating that the...

hydrogen in the intergalactic medium that the forest turns into a Gunn–Peterson trough. This shows the end of the reionization of the universe. The Lyman-alpha...

of the comet. Atomic and molecular astrophysics Emission spectrum Gunn-Peterson trough Lyman-alpha forest Photometry (astronomy) Prism Spectrometer Telluric...

the radius of a region ionized by a type O-B star. Reionization Gunn–Peterson trough Strömgren, Bengt (1939). "The Physical State of Interstellar Hydrogen"...

absorption of certain wavelengths of light by neutral hydrogen creating Gunn–Peterson troughs. The resulting ionized gas (especially free electrons) in the intergalactic...

James E. Gunn – Eugene Higgins Professor of Astronomy, leader of the Sloan Digital Sky Survey and predicted the eponymous Gunn–Peterson trough Joseph Henry...