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DESCRIPTION:Speaker: Roberto Abraham\nhosted by Ilaria Caiazzo\nAbstract: I
 n this talk I will describe the nearly unexplored universe of ghostly\, ne
 arly undetectable phenomena in the heavens. I will focus on why finding th
 ese “low surface brightness” objects is important\, and why it has als
 o been so devilishly difficult to find them using “normal” telescopes.
  We have probably been missing out seeing a vast range of exotic objects\,
  like low-surface brightness dwarf galaxies\, supernova light echoes\, gal
 actic halos\, and planetary dust rings. These objects are nearly undetecta
 ble with conventional telescopes\, but their properties may hold the keys 
 to understanding a host of fundamental phenomena\, including the nature of
  dark matter and the mechanisms by which galaxies form and evolve.These th
 ings are hard to study\, but bizarre new telescopes\, made possible by tec
 hnological advances driven by mobile phone camera sensors and processors\,
  and ubiquitous access to fast networks\, are changing the landscape. The 
 Dragonfly Telephoto Array (a.k.a. Dragonfly) is an example of this new cla
 ss of telescope. Dragonfly is comprised of 168 off-the-shelf high-end tele
 photo lenses utilizing novel nanostructure-based optical coatings. I will 
 showcase some early results from Dragonfly\, and describe how this array i
 s evolving to tackle the ultimate challenge in this subject: directly imag
 ing the “Cosmic Web”. This is the largest collapsed structure in the U
 niverse\, and the repository of most of its matter. We know this web exist
 s\, but nobody knows what it really looks like\, or how it funnels the gas
  created by the Big Bang into pockets of dark matter to drive the formatio
 n of galaxies. We are now building a massive expansion of the Dragonfly te
 lescope that will let us take pictures of the Cosmic Web\, and we hope to 
 find these things out.
LOCATION:Raiffeisen Lecture Hall\, ISTA
ORGANIZER:maria.arias.sutil@ista.ac.at
SUMMARY:Roberto Abraham: Crazy Telescopes\, Ghostly Galaxies\, and the Invi
 sible Universe
URL:https://talks-calendar.ista.ac.at/events/5106
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