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BEGIN:VEVENT
DTSTART;TZID=Atlantic/Canary:20141203T123000
DTEND;TZID=Atlantic/Canary:20141203T133000
UID:iactalks-735
X-WR-CALNAME: IAC Talks: Open Astronomy Seminars
X-ORIGINAL-URL: /iactalks/Talks/view/735
CREATED:2014-12-03T12:30:00+00:00
X-WR-CALDESC: IAC Talks upcomming talks
SUMMARY:Cold streams: detectability, relation to structure and characterist
 ics
DESCRIPTION:Cold streams: detectability, relation to structure and characte
 ristics\nDr. Tobias Goerdt\n\nCold gas streaming along the dark-matter fil
 aments of the cosmic web is  predicted to be the major provider of resourc
 es for disc buildup and  star formation in massive galaxies in the early u
 niverse. We use  hydrodynamical simulations to study to what extent these 
 cold streams  are traceable in the extended circum-galactic environment of
  galaxies  via Ly alpha emission, Ly alpha absorption and selected low ion
 isation  metal absorption lines. We predict the strength of the absorption
  signal  produced by the streams and find that it is consistent with  obse
 rvations in high redshift galaxies. The characteristics of the Ly  alpha e
 mission of our simulated galaxies are similar in luminosity,  morphology a
 nd extent to the observed Ly alpha blobs, with distinct  kinematic feature
 s. We analyse the characteristics of the cold streams  in simulations and 
 present scaling relations for the amount of infall,  its velocity, distrib
 ution and its clumpiness and compare our findings  with observations.
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