# William East

Perimeter Institute for Theoretical Physics

Areas of research:

### Research Interests

I work at the interface of gravitational physics, astrophysics, and cosmology. My research is primarily focused on understanding strong field gravity, using the tools of numerical relativity.

### Recent Publications

- T. Whittaker, W. E. East, S. R. Green, L. Lehner, and H. Yang "Using machine learning to parametrize postmerger signals from binary neutron stars" Phys. Rev. D 105, 124021 (2022) arXiv: 2201.06461
- L. Sberna, P. Bosch, W. E. East, S. R. Green, and L. Lehner, "Nonlinear effects in the black hole ringdown: absorption-induced mode excitation" Phys. Rev. D 105 , 064046 (2022) arXiv: 2112.11168
- W. E. East and J. Ripley "Dynamics of spontaneous black hole scalarization and mergers in Einstein-scalar-Gauss-Bonnet gravity" Phys. Rev. Lett. 127, 101102 (2021) arXiv: 2105.08571
- M. Corman, W. E. East, and M. C. Johnson "Nonlinear dynamics of flux compactification" J. High Energ. Phys. 2021, 21 (2021) arXiv: 2105.06434
- W. E. East, L. Lehner, S. L. Liebling, and C. Palenzuela "Multimessenger signals from black hole-neutron star mergers without significant tidal disruption" ApJL 912 L18 (2021) arXiv: 2101.12214
- L. Tsukada, R. Brito, W. E. East, and N. Siemonsen "Modeling and searching for a stochastic gravitational-wave background from ultralight vector bosons" Phys. Rev. D 103, 083005 (2021) arXiv: 2011.06995
- W. E. East and J. Ripley "Evolution of Einstein-scalar-Gauss-Bonnet gravity using a modified harmonic formulation" Phys. Rev. D 103, 044040 (2021) arXiv: 2011.03547
- N. Siemonsen and W. E. East "Stability of rotating scalar boson stars with nonlinear interactions" Phys. Rev. D 103, 044022 (2021) arXiv: 2011.08247
- T. Zhang, J. Smetana, Y. Chen, J. Bentley, D. Martynov, H. Miao, W. E. East, and H. Yang "Towards observing the neutron star collapse with gravitational wave detectors " Phys. Rev. D 103, 044063 (2021) arXiv: 2011.06705
- N. Siemonsen and W. E. East "Gravitational wave signatures of ultralight vector bosons from black hole superradiance" Phys. Rev. D 101, 024019 (2020) arXiv: 1910.09476
- W. E. East, V. Paschalidis, F. Pretorius, and A. Tsokaros "Binary neutron star mergers: effects of spin and post-merger dynamics" Phys. Rev. D 100, 124042 (2019) arXiv: 1906.05288
- W. E. East and L. Lehner "Fate of a neutron star with an endoparasitic black hole and implications for dark matter" Phys. Rev. D 100, 124026 (2019) arXiv: 1909.07968
- W. E. East, R. Wojtak, and F. Pretorius "Einstein-Vlasov Calculations of Structure Formation" Phys. Rev. D 100, 103533 (2019) arXiv: 1908.05683
- W. E. East "Cosmic censorship upheld in spheroidal collapse of collisionless matter" Phys. Rev. Lett. 122, 231103 (2019) arXiv: 1901.04498
- F. Pretorius and W. E. East "Black hole formation from the collision of plane-fronted gravitational waves" Phys. Rev. D 98, 084053 (2018) arXiv: 1807.11562
- W. E. East "Massive boson superradiant instability of black holes: nonlinear growth, saturation, and gravitational radiation" Phys. Rev. Lett. 121, 131104 (2018) arXiv: 1807.00043
- H. Yang, W. E. East, V. Paschalidis, F. Pretorius, and R. F. P. Mendes "Evolution of highly eccentric binary neutron stars including tidal effects" Phys. Rev. D 98, 044007 (2018) arXiv: 1806.00158
- W. E. East and H. Yang "The magnetosphere of a spinning black hole and the role of the current sheet" Phys. Rev. D 98, 023008 (2018) arXiv: 1805.05952
- H. Yang, W. E. East, and L. Lehner "Can we distinguish low mass black holes in neutron star binaries?" Astrophys. J. Vol 856, 110, (2018) arXiv: 1710.05891
- W. E. East, R. Wojtak, and T. Abel "Comparing fully general relativistic and Newtonian calculations of structure formation" Phys. Rev. D 97, 043509 (2018) arXiv: 1711.06681
- W. E. East, J. Kearney, B. Shakya, H. Yoo, K. M. Zurek "Spacetime dynamics of a Higgs vacuum instability during inflation" Phys. Rev. D 95, 023526 (2017) arXiv: 1607.00381
- W. E. East "Superradiant instability of massive vector fields around spinning black holes in the relativistic regime" Phys. Rev. D 96, 024004 (2017) arXiv: 1705.01544
- W. E. East and F. Pretorius "Superradiant Instability and Backreaction of Massive Vector Fields around Kerr Black Holes" Phys. Rev. Lett. 119, 041101 (2017) arXiv: 1704.04791
- W. E. East, V. Paschalidis, and F. Pretorius "Equation of state effects and one-arm spiral instability in hypermassive neutron stars formed in eccentric neutron star mergers" Class. Quantum Grav. 33 no. 24, 244004 (2016) arXiv: 1609.00725