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BEGIN:VEVENT
DTSTART;TZID=Atlantic/Canary:20150526T123000
DTEND;TZID=Atlantic/Canary:20150526T133000
UID:iactalks-784
X-WR-CALNAME: IAC Talks: Open Astronomy Seminars
X-ORIGINAL-URL: /iactalks/Talks/view/784
CREATED:2015-05-26T12:30:00+01:00
X-WR-CALDESC: IAC Talks upcomming talks
SUMMARY:The Extragalactic Background Light: Connecting Classical and High E
 nergy Astronomy
DESCRIPTION:The Extragalactic Background Light: Connecting Classical and Hi
 gh Energy Astronomy\nDr. Alberto Domínguez\n\nThe extragalactic backgroun
 d light (EBL) is the second most energetic diffuse background that fills o
 ur Universe. It is produced by star formation processes and supermassive b
 lack hole accretion over the history of the  Universe. Thus, it conta
 ins fundamental information about galaxy evolution and cosmology. Interest
 ingly, it brings together classical astronomy and high energy astrophysics
  since gamma-rays from extragalactic sources such as blazars and gamma-ray
  bursts interact by pair-production with EBL photons. Therefore, it is als
 o essential for extragalactic gamma-ray astronomy to understand precisely 
 and accurately the EBL in order to interpret correctly high energy observa
 tions. In this talk, I will review the present EBL knowledge, and describe
  how we can extract information, such as the value of the expansion rate o
 f the Universe, from the EBL. Finally, the latest all-sky Fermi-LAT catalo
 g of hard sources (E>50 GeV), called 2FHL, and future directions of EBL
  research will also be discussed.
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