[SEMINARI]: Lap-Ming Lin; LUTH, Meudon, France (fwd)

[German Rodrigo Garcia]

Numerical Study of Nonlinear R-modes in Neutron Stars


  */Lap-Ming Lin/*


  */LUTH, Meudon, France/*


/Seminari del departament d`Astronomia i Astrofisica/

/Dijous 18 novembre 2004/

/11:00/


*Resum*

/R-modes of rotating neutron stars are unstable growing modes driven by 
the back reaction of the gravitational radiation the modes themselves 
emit. The discovery of the r-mode instability has attracted much 
attention due to its possible implication on the spin rates of neutron 
stars, and the possibility of being a promising source of gravitational 
waves detectable by advanced gravitational wave detectors. However, 
whether this instability is astrophysically relevant or not depends 
critically on how large the r-mode amplitude can grow up to. In this 
talk, we will present our fully nonlinear neutron star simulation and 
show that a large amplitude r-mode will couple nonlinearly to other 
fluid modes in a way that leads to a catastrophic decay of the r-mode. 
We identify the mode-coupling mechanism responsible for this decay. The 
limit this mechanism imposes on the r-mode amplitude is studied./


http://celeste.uv.es/daa/seminari.php?id=46


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