BEGIN:VCALENDAR
VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:1
UID:UW-Physics-Event-5104
DTSTART:20190430T170000Z
DTEND:20190430T181500Z
DTSTAMP:20260308T035314Z
LAST-MODIFIED:20190426T191952Z
LOCATION:4421 Sterling Hall\, Noon Talk
SUMMARY:An introduction to radiatively driven stellar winds \, Noon Co
 lloquium\, Wolf-Rainer Hamann\, Institute for Physics and Astronomy\, 
 University of Potsdam
DESCRIPTION:Stellar spectra that are dominated by bright and broad emi
 ssion lines have been discovered by the French astronomers Wolf and Ra
 yet 150 years ago\, and must be attributed to strong outflow of matter
 . But only with the advent of ultraviolet spectroscopy in the 1970s it
  became known that stellar winds are ubiquitous among hot and luminous
  stars. <br>
\n<br>
\nIn principle\, such winds can be driven by radia
 tion pressure. The
\nquantitative analysis of stellar-wind spectra req
 uires adequate 
\nmodeling of expanding stellar atmospheres. 
\n
\nThe
  evolution of massive stars and their final fate depends on their mass
  loss. This refers especially to the mass that might finally collapse 
 into a Black Hole - i.e. such objects which are observed by gravitatio
 nal waves when merging.  
URL:https://www.physics.wisc.edu/events/?id=5104
END:VEVENT
END:VCALENDAR