ELFT HÍRADÓ

[szpl <szpl AT metal.elte.hu>]

ELTE Fizikai Intézet

                                ORTVAY KOLLOKVIUM

                    2016. február 25., csütörtök, 15:00-kor
                Az ELTE Pázmány Péter s. 1/A alatti épületében
                           földszinti 0.81 előadóban

                                Peter Berczik
        (Astronomisches Rechen-Institut (ARI) am Zentrum fuerAstronomie
   der Universitaet Heidelberg (ZAH), Heidelberg, Germany; Main Astronomical
Observatory (MAO), National Academy of Sciences of Ukraine (NASU), Kyiv, 
Ukraine)

   "Galaxy collision simulations with central Post Newtonian Supermassive
                            Binary Black Holes"

Kivonatos ismertetés:
The most energetic gravitational waves (GWs) are generated by merging 
supermassive binary black holes (SMBBHs) in the centers of galaxies. In our 
high order post-Newtonian N-body simulations, we study galaxy-galaxy collisions
with the maximum numerical resolution possible today. For the simulations, we 
use the largest astrophysical Graphical Processing Unit (GPU) accelerated 
clusters, including the TITAN GPU supercomputer in the USA which holds the 
second place in the recent top500 list. The central SMBBH is simulated as 
special particles with post-Newtonian force corrections (up to 1/c**7 terms) 
implemented for the BHs' gravitational interactions. We find that the SMBBH 
merger time shows a quite strong dependency on the merging galaxies' mass ratio.
Using our simulations, we obtain upper limits for the final GW merger time for
SMBBHs in observational galaxy pair candidates.