Helium Reionization in the Early Universe

Helium Reionization in the Early Universe

Download Options

Fast Facts
News release ID: STScI-2010-31
Release Date: Oct 7, 2010
Image Use: Copyright
About this image

This ultraviolet-light data from the Hubble Space Telescope's Cosmic Origins Spectrograph shows strong helium II absorption and transmission lines from a quasar, identifying an era 11.7 to 11.3 billion years ago when electrons were stripped from primeval helium atoms – a process called reionization.


Tags
Active Galaxies/Quasars, Astronomical, Cosmology, Galaxies, Hubble Telescope, Illustrations, Intergalactic Gas

Credits

Credit: Shull et al., ApJ, 722: 1312-1324, October 20, 2010