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SUMMARY:Superstellar clusters and their impact on their host galaxies - Gu
 illermo Tenorio-Tagle\, INAOE\, Mexico
DTSTART:20091112T163000Z
DTEND:20091112T173000Z
UID:TALK19958@talks.cam.ac.uk
CONTACT:scott chapman
DESCRIPTION:I will review the main properties of young superstar clusters 
 (SSCs)\nand then show that there are two different stationary hydrodynamic
   \nsolutions for the matter re-inserted by the plethora of massive stars 
 that\, as  they evolve\, undergo strong winds and eventually explode as su
 pernovae.\nOne of the solutions is a full stationary wind. This has a stro
 ng  impact on the interstellar medium. I will show that the structure of G
 iant HII regions and HII galaxies  is caused by a\ndramatic competition be
 tween the two negative feedback events: the mechanical energy and the UV i
 onizing radiation arising from SSCs.\n\nThe second hydrodynamical solution
 \, now called the bimodal solution\, is unavoidable for the more dense and
  compact clusters. In these  cases\, the cluster wind is\nmuch smaller tha
 n what it has been predicted by synthesis models. The  \nfact is that\nthe
  densest central regions become strongly radiative\, what depletes  \nrapi
 dly their pressure\,\nmaking them unable to reach the required speeds to p
 articipate in a  \nwind.\nIn these cases the re-inserted matter accumulate
 s within the cluster  \nvolume\,\ncausing a positive star formation feedba
 ck\, as gravity overcomes this  matter\n\n
LOCATION:Sackler Lecture Theatre\, IoA (tea at 4:00 pm)
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