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SUMMARY:Dynamical friction and the evolution of Supermassive Black hole Bi
 naries: the final hundred-parsec problem - Fani Dosopoulou (Northwestern U
 niversity)
DTSTART:20180319T140000Z
DTEND:20180319T150000Z
UID:TALK103228@talks.cam.ac.uk
CONTACT:Dr. Yufeng Lin
DESCRIPTION:Dynamical friction is a fundamental process in astrophysics\na
 nd its understanding is arguably the most important contribution of\nChand
 rasekhar to stellar dynamics.\nIn this talk I will discuss  the results of
  analytical models and N-body\nsimulations that describe the\nevolution of
  a massive black hole binary due to dynamical friction.\nI will show that 
 the standard Chandrasekhar's theory leads to erroneous\nconclusions about 
 the evolution\nof the massive binary because the usual simplifying assumpt
 ions that\nlead to neglect the contribution\nof stars with large velocitie
 s appear to break down. I will discuss the\nimplications of our results fo
 r a number of observational puzzles\,  which include the\npresence of\nmul
 tiple nuclei in bright ellipticals\, off-center AGNs and eccentric\nnuclea
 r disks. 
LOCATION:MR15\,  Centre for Mathematical Sciences\, Wilberforce Road\, Cam
 bridge
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