Image of Alice in Wonderland at the Mad Hatter's tea party You are cordially invited to afternoon tea and biscuits wine and chocolate

Astronomy Tea Talks at Caltech

Mondays, Hameetman auditorium (Cahill)
Tea:  4.00pm
Talk: 4.15pm

Organized by:

2010 - 2011 season:
16 May 2011 Steve Furlanetto (UCLA)

''The Reionization of Intergalactic Helium''

Near the peak of the galaxy and quasar formation era, high-energy photons from quasars stripped intergalactic helium atoms of their final electrons in a process known as "reionization." Observations are finally zeroing in on this event, and they allow us to test our understanding of quasars, galaxies, and the intergalactic medium at z~3. I will describe what we have learned and hope to learn from helium reionization.

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Last modified on 20th Jul 2011 by Dominik A. Riechers.  

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