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SUMMARY:The Recent Star Formation Histories of Nearby Galaxies - Evan Skil
 lman\, University of Minnesota
DTSTART:20090226T163000Z
DTEND:20090226T173000Z
UID:TALK15293@talks.cam.ac.uk
CONTACT:scott chapman
DESCRIPTION:Recent (< 0.5 Gyr) star formation histories have a large impac
 t on the\nobservable properties of galaxies.  The HST has allowed us to co
 nstruct\nspatially resolved star formation histories of nearby (D < 4 Mpc)
  galaxies\nwith a time resolution of roughly 30 Myr over the last 500 Myr.
 \nThese observations allow us to directly observe the strength and\nspatia
 l relationships of the recent star formation in these galaxies.\nWe can st
 udy the impact of recent star formation on the ISM.\nIn the case of the dw
 arf galaxy Holmberg II\, it appears that most of\nthe holes in the ISM are
  caused by recent star formation\, although not\nall recent star formation
  results in the production of an HI hole.\nWe can also study the fraction 
 of stars that are made in episodic\nbursts and characterize the duration a
 nd spatial extents of these bursts.\n>From a study of prototype dwarf star
 burst galaxies we find that the\ndurations of the starbursts are in excess
  of 100 Myr\, and that the\nstar formation in the burst is distributed acr
 oss the galaxies.\nIt is also interesting to compare the star formation hi
 stories as\nembedded in the resolved stellar populations with the star for
 mation\nrate indicators available from H-alpha\, UV\, and IR observations.
 \n
LOCATION:Sackler Lecture Theatre\, IoA (tea at 4:00 pm)
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