야구 토토PHYSICS/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,야구 토토Postech Information Research Laboratories
Ø* Date & Time : Nov,야구 토토27(Fri)야구 토토4:00 ~ 5:00 pm

  
ØAbstract
  
Many interesting astrophysical phenomena are known in binary systems containing a
white dwarf when the야구 토토companion야구 토토star야구 토토loses야구 토토some야구 토토its야구 토토mass.야구 토토White야구 토토dwarf야구 토토binary
systems are progenitors of Type Ia supernovae, which야구 토토are야구 토토important야구 토토to야구 토토probe야구 토토the
accelerated expansion of the universe.야구 토토Outward transport of angular momenta leads
to the formation of an accretion disk around the white dwarf. Many details in accretion
flow are known야구 토토in야구 토토close야구 토토binary야구 토토systems,야구 토토which are collectively야구 토토called 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.야구 토토In야구 토토this
talk, a brief introdcution to accretion phenomena in binary systems야구 토토of야구 토토awhite야구 토토dwarf
will be given with some observational results obtained from Mt. Bohyun.
                    

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