토토 후기PHYSICS/BK21 Colloquium[09.11.27]

“Mass Transfer in Binary Systems of a White Dwarf”

  
Ø* Speaker : Prof. Heewon Lee[Sejong University]
Ø* Place : Demonstration Lecture Hall 122,토토 후기Postech Information Research Laboratories
Ø* Date & Time : Nov,토토 후기27(Fri)토토 후기4:00 ~ 5:00 pm

  
ØAbstract
  
Many interesting astrophysical phenomena are known in binary systems containing a
white dwarf when the토토 후기companion토토 후기star토토 후기loses토토 후기some토토 후기its토토 후기mass.토토 후기White토토 후기dwarf토토 후기binary
systems are progenitors of Type Ia supernovae, which토토 후기are토토 후기important토토 후기to토토 후기probe토토 후기the
accelerated expansion of the universe.토토 후기Outward transport of angular momenta leads
to the formation of an accretion disk around the white dwarf. Many details in accretion
flow are known토토 후기in토토 후기close토토 후기binary토토 후기systems,토토 후기which are collectively토토 후기called cataclysmic
variables. Much less is known in the case of wide binaries known as symbiotic stars,
where mass transfer is achieved via gravitational capture of slow stellar wind.토토 후기In토토 후기this
talk, a brief introdcution to accretion phenomena in binary systems토토 후기of토토 후기awhite토토 후기dwarf
will be given with some observational results obtained from Mt. Bohyun.
                    

Contact Person : Prof. Jaemo Park (054-279-2090,jaemo@postech.ac.kr)