PHYSICS/BK21 Colloquium[09.11.27]
관련링크
본문
“Mass Transfer in Binary Systems of a White Dwarf”
Ø* Speaker : Prof. Heewon Lee[Sejong University]
Ø* Place : Demonstration Lecture Hall 122, Postech Information Research Laboratories
Ø* Date & Time : Nov, 27(Fri) 4:00 ~ 5:00 pm
ØAbstract
Many interesting astrophysical phenomena are known in binary systems containing a
white dwarf when the companion star loses some its mass. White dwarf binary
systems are progenitors of Type Ia supernovae, which are important to probe the
accelerated expansion of the universe. Outward transport of angular momenta leads
to the formation of an accretion disk around the white dwarf. Many details in accretion
flow are known in close binary systems, which are collectively called 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. In this
talk, a brief introdcution to accretion phenomena in binary systems of awhite dwarf
will be given with some observational results obtained from Mt. Bohyun.
Contact Person : Prof. Jaemo Park (054-279-2090, jaemo@postech.ac.kr)