ELFT HÍRADÓ

[Fodor Gyula <gfodor AT rmki.kfki.hu>]

 KFKI RMKI Elméleti Föosztály Szemináriuma


 Tisztelettel meghívjuk

             Philippe Grandclément
           (LUTH, Paris Observatory)

"Binary black holes initial data and spectral methods"

         címmel tartandó szemináriumára.

Kivonat:

With the ground-based detectors currently taking data, the first direct 
detection of a gravitational wave may occur in a short time-scale. Also, 
in the recent years evolution codes for binary black holes have shown 
dramatic improvements. Such systems can be evolved for tens of orbits up 
to merger and the results are in very good agreement with post-Newtonian 
ones. Nevertheless there are still some work to do on the initial data 
part of the problem.

I will first review the 3+1 formalism of general relativity and its 
application to the binary black holes problem. In particular, I will 
discuss the way boundary conditions can be imposed on the horizons. Up to 
date numerical results will then be presented. Possible leads to get more 
precise initial data will be discussed.

The use of spectral methods to solve the initial data problem has proved 
to be extremely fruitful. I will briefly present the basis of the spectral 
approximation and discuss a new general solver that is currently being 
designed to get more insight on binary black holes configurations.


 Helye: KFKI RMKI III. ép. Tanácsterem
 Ideje: 2008. július 11. péntek du 14.00 óra


Szívesen látunk minden érdeklödöt.
                                          Fodor Gyula