Steven L. Detweiler was a theoretical physicist and professor of physics at the University of Florida best known for proposing pulsar timing arrays as a means to detect gravitational waves,[2] an idea that led to the discovery of a stochastic gravitational wave background in 2023.[3]
Steven Lawrence Detweiler | |
|---|---|
| Born | |
| Died | February 8, 2016 |
| Alma mater | Princeton University Chicago University |
| Known for | Gravitational waves Black holes Pulsar timing array |
| Awards | Fellowship of the American Physical Society |
| Scientific career | |
| Fields | Theoretical physics |
| Institutions | University of Florida |
| Doctoral advisor | James R. Ipser |
Background edit
Detweiler received his undergraduate degree from Princeton University in 1969. He obtained his Ph.D. from Chicago University in 1976 under the supervision of James R. Ipser.[4] In 2013, he was elected to a fellowship of the American Physical Society in recognition of his many and varied contributions to gravitational physics.[5][6]
Detweiler's research focused on the dynamics of stars and black holes, as well as on the production and observation of gravitational waves. In 1975 together with Subrahmanyan Chandrasekhar, Detweiler calculated the effects of fluctuations on black holes.[7] This is important for understanding the stability of black holes, as well as the later stages of the dynamics of black hole mergers. In 1979, Detweiler proposed the idea of a pulsar timing array to measure gravitational waves with wavelengths on the scale of light-years.[2] This built upon an earlier proposal by Mikhail Sazhin to use individual pulsars.[8] The idea was first taken up experimentally by Foster and Backer in 1990,[9] and today globally there are five active pulsar timing array experiments. In 2023, this idea led to the discovery of a stochastic gravitational wave background by the NANOGrav experiment and other pulsar timing array experiments.[3]
References edit
- ^ "Steven Lawrence Detweiler, Legacy Obituary". Legacy.com. Retrieved 2024-01-05.
- ^ a b Detweiler, Steven L. (1979). "Pulsar timing measurements and the search for gravitational waves". Astrophys. J. 234: 1100. Bibcode:1979ApJ...234.1100D. doi:10.1086/157593.
- ^ a b NANOGrav (2023). "The NANOGrav 15 yr Data Set: Evidence for a Gravitational-wave Background". Astrophys. J. Lett. 951 (1): L8. arXiv:2306.16213. Bibcode:2023ApJ...951L...8A. doi:10.3847/2041-8213/acdac6.
- ^ "Steven L. Detweiler, Inspire". Retrieved 2024-01-05.
- ^ "Steven Detweiler". Physics Today. 2016. doi:10.1063/PT.5.6205. Retrieved 15 May 2024.
- ^ "APS Fellowships". American Physical Society. Retrieved 15 May 2024.
- ^ Chandrasekhar, S.; Detweiler, S. (1975). "The quasi-normal modes of the Schwarzchild black hole". Proc. Roy. Soc. Lond. A. 344 (1639): 441–452. Bibcode:1975RSPSA.344..441C. doi:10.1098/rspa.1975.0112.
- ^ Sazhin, Mikhail V. (1978). "Opportunities for detecting ultralong gravitational waves". Sov. Astron. 22: 36–38. Bibcode:1978SvA....22...36S.
- ^ Foster, R.S.; Backer, D.C. (1990). "Constructing a pulsar timing array". Astrophysical Journal. 361: 300–308. Bibcode:1990ApJ...361..300F. doi:10.1086/169195.