Abstract of the talk
given by Prof. Sergey Silich,INAOE, Mexico
GALACTIC SUPERWINDS
Tuesday, 4th February 2003
at 10:00 ct Uhr
in NA 7/32 at the Ruhr-Universität Bochum
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Mechanical feedback from massive stars is one of the major drivers of
galaxy evolution. In the extreme cases shock waves generated in the
sites of violent star formation may punch through the interstellar
medium and form channels for free gas ejection into the intergalactic
space. The process that is known as a galactic superwind. It is a common believe that superwinds at the early universe evolution and at the present day epoch may be responsible for intergalactic medium heating and enrichment by heavy elements and control host galaxies chemical evolution. However starburst impact on the interstellar and intergalactic medium is highly dependent both on the host galaxy properties and the starburst parameters.
Several key problems related to this issue are discussed:
- WHAT IS THE MECHANICAL ENERGY INPUT RATE THAT IS REQUIRED TO EJECT
NEWLY PROCESSED METALS OR MOST OF THE ISM OUT OF THE HOST GALAXY?
- WHAT IS THE EXPECTED GALACTIC SUPERWIND CHEMICAL COMPOSITION?
- HOW SUPERWIND OBSERVATIONAL PROPERTIES (X-RAY and Halpha
LUMINOSITIES) DEPEND ON STARBURST PARAMETERS?