Journal article
GRAVITATIONAL-RADIATION FROM NONAXISYMMETRIC COLLISIONS OF NEUTRON-STARS
The Astrophysical journal, v 416(2), pp 719-732
20 Oct 1993
Abstract
We study the gravitational radiation produced by nonaxisymmetric collisions of identical neutron stars. We model the neutron stars as polytropes and consider both GAMMA = 5/3 and GAMMA = 2. The hydrodynamic integration is performed using smooth particle hydrodynamics (SPH). The second derivative of the quadrupole moment of the system is obtained analytically from the SPH equations of motion, so that only one numerical derivative is needed to obtain the gravitational radiation luminosity, greatly reducing the numerical noise in our results. In addition to the intrinsic interest of the problem, these calculations have provided a useful test bed for calibration of our code and comparison with other workers. Waveform and luminosity catalogs are presented for a sequence of parabolic encounters. The amount of energy radiated as gravitational waves peaks at GAMMAE/M approximately 6.5(M/R)7/2 for GAMMA = 5/3 and GAMMAAE/M approximately 3.7(M/R)7/2 for GAMMA = 2. Observations of the wave forms may allow different equations of state to be distinguished in some, but not all, cases.
Metrics
Details
- Title
- GRAVITATIONAL-RADIATION FROM NONAXISYMMETRIC COLLISIONS OF NEUTRON-STARS
- Creators
- J M CentrellaSLW Mcmillan
- Publication Details
- The Astrophysical journal, v 416(2), pp 719-732
- Publisher
- Univ Chicago Press
- Number of pages
- 14
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics
- Web of Science ID
- WOS:A1993MA82600028
- Scopus ID
- 2-s2.0-12044254486
- Other Identifier
- 991019231754904721
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- Web of Science research areas
- Astronomy & Astrophysics