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SUMMARY:Finding the Remains of Murdered Haloes and Galaxies: The Streams G
 oing Notts Comparison Study - Pascal Elahi\, Shanghai Astronomical Observa
 tory
DTSTART:20121130T113000Z
DTEND:20121130T123000Z
UID:TALK41395@talks.cam.ac.uk
CONTACT:Sergey Koposov
DESCRIPTION:Deep observations show that galaxies have turbulent lives. Som
 e are even completely destroyed such as the Sagittarius stream. Such event
 s are not expected as galaxies simulations show dark matter haloes\, which
  host these galaxies\, grow by accreting other haloes and contain a wealth
  of substructure. Most studies typically focus on intact subhaloes and the
 ir luminous counterparts\, satellite galaxies. Yet tidal remnants provide 
 another avenue to test the current paradigm of structure formation. Dark m
 atter tidal streams may constitute an important component of our Halo and 
 their properties have important ramifications for direct dark matter detec
 tors. Stellar streams provide a means of doing Galactic Archeology. Unfort
 unately\, the stream content of haloes from cosmological simulations is un
 known simply due to the fa! ct that many object finders used to identify s
 ubhaloes cannot be used to detect streams. Here I will present the first s
 tudy examining how well the few code capable of\, in principle\, identifyi
 ng streams\,such as my own algorithm\, recover streams. I will also presen
 t preliminary work on how dark matter streams contribute to the make-up of
  a halo. Time permitting\, I will also discuss how these techniques could 
 be adapted to observational searches for stellar streams\, which of great 
 relevance for upcoming missions such as GAIA.
LOCATION:Kavli LMR\, IoA
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