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- W2039402436 abstract "We present a multi-domain spectral method to compute initial data of binary systems in general relativity. By utilizing adapted conformal coordinates, the vacuum region exterior to the gravitational sources is divided into two subdomains within which the spectral expansion of the field quantities is carried out. If a component of the binary is a neutron star, a further subdomain covering the star's interior is added. As such, the method can be used to construct arbitrary initial data corresponding to binary black holes, binary neutron stars or mixed binaries. In particular, it is possible to describe a black hole component by the puncture ansatz as well as through an excision technique. First examples are given for binary black hole excision data that fulfil the requirements of the quasi-stationary framework, which combines the conformal thin sandwich formulation of the constraint equations with the isolated horizon conditions for black holes in quasi-equilibrium. These numerical solutions were obtained to extremely high accuracy with moderate computational effort. Moreover, the method proves to be applicable even when tending towards limiting cases such as large mass ratios of the binary components." @default.
- W2039402436 created "2016-06-24" @default.
- W2039402436 creator A5062393869 @default.
- W2039402436 date "2007-05-30" @default.
- W2039402436 modified "2023-09-27" @default.
- W2039402436 title "A multi-domain spectral method for initial data of arbitrary binaries in general relativity" @default.
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- W2039402436 doi "https://doi.org/10.1088/0264-9381/24/12/s01" @default.
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