GW1 - Sources of Gravitational Waves |
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Speaker |
Rosinska, Dorota |
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Coauthors |
Kowalska I., Studzinska A., Kucaba M., Villain L., Ansorg M. |
| Talk Title |
New view on properties of differentially rotating neutron stars |
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Abstract |
An understanding of differentially rotating relativistic stars is key to many areas of astrophysics, in particular to the emission of gravitational waves. A newly born, proto-neutron star or a compact remnant of neutron stars binary merger are expected to rotate differentially and to be important sources of gravitational radiation. A highly accurate, multidomain spectral code is used in order to construct sequences of general relativistic, differentially rotating neutron stars in axisymmetry and stationarity. The high level of accuracy and stability of the code enable us to study stars with maximal masses and high rotation profiles. We investigate the solution space corresponding to broad ranges of degree of differential rotation and stellar densities. We find various types of configurations, which were not considered in previous work, mainly due to numerical limitations. The maximum allowed mass for the new types of configurations and moderate degree of differential rotation can be even 2-4 times higher then the maximum mass of non-rotating neutron stars with the same equation of state. Differential rotation can temporarily stabilize a hyper-massive neutron star against gravitational collapse. |
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