Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aas...19411602c&link_type=abstract
American Astronomical Society Meeting 194, #116.02
Astronomy and Astrophysics
Astronomy
1
Scientific paper
Coalescing pairs of neutron stars are expected to be among the sources of gravitational waves that will be observed by gravitational wave detectors in the next decade. Accurate theoretical predictions of the gravitational wave signatures of these events will be required to extract the signals from background noise. Post-Newtonian models can be applied to these systems, but full 3-d simulations are required to properly capture tidal effects, particularly in the last several orbits. We present additional results of our numerical studies of coalescing neutron star pairs with Newtonian hydrodynamics coupled to the 2.5 Post-Newtonian radiation reaction of Blanchet, Damour, and Schafer (1990). Our simulations evolve the Euler equations using a modification of the ZEUS 2-d algorithm (Stone and Norman 1992) and use a Fast Fourier Transformation method for solving the Poisson equation for the gravitational field. We find that the radiation reaction produces a dramatic effect on a configuration of neutron stars when compared to a purely Newtonian simulation. Our method of simulation produces results that allow us to examine the structure of the gravitational wave radiation producing regions of the configuration. We find that a majority of the gravitational wave radiation produced during simulations of the coalescence emanates from the tidally distorted regions of the stars rather than the regions of highest density.
Calder Alan C.
Swesty Frank Douglas
Wang Edward Yung Ming
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