# Saul A. Teukolsky

##### Hans A. Bethe Professor of Physics and Astrophysics

##### Specialty Areas

Theoretical Astrophysics

##### Research Projects

Solving Einstein's Equations for Black Hole Mergers Using Supercomputers.

##### Biography

Saul Teukolsky's major research interests include general relativity, relativistic astrophysics, and computational astrophysics. He is engaged in a long-term project to solve Einstein's equations of general relativity by computer. One of the ultimate goals of this project is to predict the gravitational waveform from coalescing black holes in binary orbit about each other. It is expected that such events will be among the first signals detected when the Laser Interferometer Gravitational Wave Observatory (LIGO) comes into operation. This project uses large supercomputers all over the country, and is being carried out in collaboration with researchers at several other institutions.

Teukolsky's recent research has spanned many other topics in relativistic astrophysics. He has worked on naked singularities in general relativity; the properties of rapidly rotating neutron stars, including possible observational signatures in pulsars; exploding neutron stars; relativistic stellar dynamics; and planets around pulsars. Most of this work is done in collaboration with other members of the Theoretical Astrophysics Group, including graduate students.

##### Selected Publications

- Simulations of Inspiraling and Merging Double Neutron Stars Using the Spectral Einstein Code. R. Haas, C. D. Ott, B. Szilagyi, J. D. Kaplan, J. Lippuner, M. A. Scheel, K. Barkett, C. D. Muhlberger, T. Dietrich, M. D. Duez, F. Foucart, H. P. Pfeiffer, L. E. Kidder and S. A. Teukolsky. Submitted to Phys. Rev. D. arXiv:1604:00782 (2016)

- Tests of General Relativity with GW150914. The LIGO Scientific Collaboration and the Virgo Collaboration. Submitted to Phys. Rev. D. ArXiv:1602:03841 (2016)

- Formulation of Discontinuous Galerkin Methods for Relativistic Astrophysics. S. A. Teukolsky. J. Comp. Phys. 312, 333 (2016)

- The Kerr Metric. S. A. Teukolsky Class. Quantum Grav. 32, 124006 (2015)

- Magnetic Effects on the Low-T/W Instability in Differentially Rotating Neutron Stars. C. D. Muhlberger, F. H. Nouri, M. D. Duez, F. Foucart, L. E. Kidder, C. D. Ott, M. A. Scheel, B. Szilagyi and S. A. Teukolsky. Phys. Rev. D 90, 104014 (2014)

- Catalog of 174 Binary Black-Hole Simulations for Gravitational-Wave Astronomy. A. H. Mroue, M. A. Scheel, B. Szilagyi, H. P. Pfeiffer, M. Boyle, D. A. Hemberger, L. E. Kidder, G. Lovelace, S. Ossokine, N. W. Taylor, A. Zenginoglu, L. T. Buchman, T. Chu, E. Foley, M. Giesler, R. Owen and S. A. Teukolsky. Phys. Rev. Lett. 111, 241104 (2013)

- Spinning Down Newborn Neutron Stars: Nonlinear development of the R-Mode Instability. R. Bondarescu, S. A. Teukolsky and I. Wasserman. Phys. Rev., D79, 104003 (2009).

- Initial Data for Black Hole-Neutron Star Binaries: A Flexible, High-Accuracy Spectral Method. F. Foucart, L. E. Kidder, H. P. Pfeiffer and S. A. Teukolsky. Phys. Rev., D77, 124051 (2008).

- Evolving Compact Object Binaries in General Relativity Using Pseudospectral and Finite Difference Methods. M. D. Duez, F. Foucart, L. E. Kidder, H. P. Pfeiffer, M. A. Scheel and S. A. Teukolsky. Phys. Rev., D78, 104015 (2008).

- Numerical Recipes: The Art of Scientific Computing, W. H. Press, S. A. Teukolsky, W. T. Vetterling and B. P. Flannery (3rd ed., Cambridge University Press, New York 2007).

- Black Holes, White Dwarfs, and Neutron Stars: The Physics of Compact Objects, S. L. Shapiro and S. A. Teukolsky (John Wiley, New York 1983).