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SUMMARY:Radiation feedback in high and low mass star and planet formation 
 - Barbara Ercolano\, IoA\, Cambridge
DTSTART:20100513T153000Z
DTEND:20100513T163000Z
UID:TALK21666@talks.cam.ac.uk
CONTACT:scott chapman
DESCRIPTION:Star formation plays a major role in the evolution of our Univ
 erse and\nunderstanding the circumstellar (CS) environment of protostars a
 nd young\nstars can also provide crucial information on how planets form.\
 n\nA number of unsolved problems in high and low mass star and planet\nfor
 mation depend on our understanding of the way radiation from newly born\ns
 tars interacts with their circumstellar environments. In this talk I will\
 nreview some of the open questions that relate to this radiation feeback\,
 \nas well as outline how these are currently being or will be tackled in t
 he\nnear future.\n\nIn particular I will present some of our recent result
 s on the evolution\nand dispersal of protoplanetary disks irradiated by ac
 tive young stellar\nobjects (YSOs). Through detailed thermochemical and hy
 drodynamical\nsimulations we find that that X-rays from the central YSOs m
 ay drive\npowerful outflows which may be responsible for the dispersal of 
 the disks.\nThe timescales for dispersal have direct consequences on plane
 t formation\,\nwhich will also be discussed.\n\nMoving onto larger scales 
 I will show how massive OB stars can shape their\nsurrounding by means of 
 ionising radiation influencing the formation of\nsuccessive generation of 
 stars\, and driving turbulence in the interstellar\nmedium.\n\nDuring the 
 course of my talk a brief introduction will be given to the 3D\nphotoionis
 ation and dust radiative transfer Monte Carlo code\, MOCASSIN\n(Ercolano e
 t al.\, 2003\, 2005\, 2008)\, which is a crucial tool for the study\nof ra
 diation trasport in complex density and radiation fields.\n
LOCATION:Sackler Lecture Theatre\, IoA (tea at 4:00 pm)
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