Bowen-type initial data for simulations of neutron stars in binary systems

Numerical relativity;Astrophysics;Neutron stars;Gravitational waves

Clark, Michael C. ; Wise, John Physics Laguna, Pablo Shoemaker, Deirdre Cadonati, Laura Bader, David ; Wise, John

University:Georgia Institute of Technology

Department:Physics

关键词: Numerical relativity;    Astrophysics;    Neutron stars;    Gravitational waves;   

Others  :  https://smartech.gatech.edu/bitstream/1853/55005/1/CLARK-DISSERTATION-2016.pdf

美国|英语

来源: SMARTech Repository

【 摘 要 】

A new method for generating initial data for simulations of neutron stars in binary systems. The construction of physically relevant initial data is crucial to accurate assessment of gravitational wave signals relative to theoretical predictions. This method builds upon the Bowen-York curvature for puncture black holes. This data is evolved and compared against simulations in the literature with respect to orbital eccentricity, merger and collapse times, and emitted energy and angular momentum. The data exhibits some defects, including large central density oscillations in stars and center of mass drift in unequal-mass systems. Some approaches for improvements in potential future work are discussed.