Statistical Detection of the He ii Transverse Proximity Effect: Evidence for Sustained Quasar Activity for >25 Million Years

Statistical Detection of the He ii Transverse Proximity Effect: Evidence for Sustained Quasar Activity for >25 Million Years

The reionization of helium at z ~ 3 is the final phase transition of the intergalactic medium and supposed to be driven purely by quasars. The He ii transverse proximity effect—enhanced He ii transmission in a background sightline caused by the ionizing radiation of a foreground quasar—therefore off...

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Bibliographic Details
Main Authors: Tobias M. Schmidt, Gabor Worseck, Joseph F. Hennawi, J. Xavier Prochaska, Neil H. M. Crighton, Zarija Lukić, Jose Oñorbe
Format: Article
Language:English
Published: Frontiers Media S.A. 2017-10-01
Series:Frontiers in Astronomy and Space Sciences
Subjects:
dark ages
reionization
first stars – intergalactic medium
– quasars: general
– quasars: lifetime
– quasars: obscuration
Online Access:http://journal.frontiersin.org/article/10.3389/fspas.2017.00023/full

Internet

http://journal.frontiersin.org/article/10.3389/fspas.2017.00023/full

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