[CvGmt News] avviso Colloquio della Classe di Scienze, prof. Richard Ellis (23.11.2016)

[Valeria Giuliani]

*Colloqui della Classe di Scienze*



Mercoledì 23 novembre 2016
ore 15:00



*Scuola Normale Superiore*

Pisa

(Sala degli Stemmi)


*Prof. * *Richard Ellis*

*(European Southern Observatory and University College London)*


Terrà un seminario dal titolo:



*“Let There Be Light: The Observational Quest for the First Galaxies”*



*Abstract:*

*The first billion years after the Big Bang can be regarded as the final
observational frontier in assembling a coherent picture of cosmic history.
During this period early stars and galaxies formed and the Universe became
bathed in ultraviolet light for the first time. Sometime during this period
hydrogen in the medium inbetween galaxies also transitioned from a neutral
gas to one that was fully ionized. How and when did this `cosmic
reionization’ occur and were early star-forming galaxies the primary
agents?  Recent measures by ESA's Planck satellite suggest
that reionization was a rapid process occurring later than originally
envisaged. This development raises the exciting prospect that we may be
able to directly observe the first galaxies. Deep exposures with the Hubble
Space Telescope have provided the primary evidence that star-forming
galaxies were present during the relevant period. Detailed spectroscopy of
these galaxies is now required to address these important questions. I will
review the rapid progress being made in this area with current facilities,
and the prospects with upcoming ones, including the James Webb Space
Telescope due for launch in 2018 and extremely large
ground-based telescopes now under construction.  *



Tutti gli interessati sono invitati a partecipare.



Classe di Scienze Matematiche e Naturali


Valeria Giuliani
Scuola Normale Superiore
Servizio alla Didattica e Allievi
tel. 050 509260
Piazza dei Cavalieri, 7
56126 Pisa
E-mail: valeria.giuliani at sns.it
E-mail: classi at sns.it
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