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In 1968 (10 November), Lovelace and his collaborators discovered period \(P\approx 33\) ms of the Crab Pulsar.[1][2] As a graduate student working at Arecibo Observatory, Lovelace developed a version of the Fast Fourier transform program [3] which was adapted to run on the Arecibo Observatory's CDC 3200 computer. [4] This program helped to separate the periodic pulsar signal from the noise, and one night he discovered the period of the Crab pulsar.
[5][4] A few weeks earlier, observers from the National Radio Astronomy Observatory reported about two pulsating sources near the Crab Nebula, with no evident periodicities.[6][7] Lovelace and collaborators found that one of pulsars (the NP 0532) is located in the center of the Crab Nebula (with precision of 10') and found it's period with a high precision: 33.09 ms.[8][4]
This was the fastest pulsar found at that time.[2][9] This discovery helped to proof the idea that pulsars were rotating neutron stars.[10][11] Before that, many scientists believed that pulsars were pulsating white dwarfs or neutron stars.[12][11]
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and in 2010 became an editorial board member of Journal of Computational Astrophysics and Cosmology.Template:Citation needed
and in 2010 became an editorial board member of "Journal of Computational Astrophysics and Cosmology".[13]
References
- ↑ “Expertise Finder” Toronto (Canada)
- ↑ 2.0 2.1 "Out of the Zenith. Jodrell Bank 1957-1970" Sir. Bernard Lovell 1973, London: Oxford University Press, pp 1-255 (see page159).
- ↑ "Gauss and the history of the fast Fourier transform" Heideman, Michael T., Johnson, Don H., Burrus, Charles Sidney 1984. (PDF). IEEE ASSP Magazine. 1 (4): 14–21. CiteSeerX 10.1.1.309.181. doi:10.1109/MASSP.1984.1162257. S2CID 10032502
- ↑ 4.0 4.1 4.2 "On the Discovery of the Period of the Crab Nebula Pulsar" Cornell University
- ↑ "Astrophysical Formulae. Space, Time, Matter and Cosmology" Kenneth R. Lang 2014, Publisher: Springer Berlin Heidelberg
- ↑ "Pulsating radio sources near Crab Nebula" Howard, W. E., Staelin, D. H., Reifenstein, E. C. 1968, IAU Circ., No. 2110, #2
- ↑ "Pulsating Radio Sources near the Crab Nebula" Staelin, David H. and Reifenstein, Edward C., III, December 1968, Science, Volume 162, Issue 3861, pp. 1481-1483
- ↑ Cite error: Invalid
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- ↑ ” Rotating Neutron Stars as the Origin of the Pulsating Radio Sources” T. Gold 1968, Nature, Volume 218, Issue 5143, pp. 731-732
- ↑ 11.0 11.1 "Recent observations of pulsars support the rotating neutron star hypothesis." T. Gold, 1969, Nature, Volume 221, Issue 5175, pp. 25-27.
- ↑ “Observations of a Rapidly Pulsating Radio Source” A. Hewish, S. J. Bell, J. D. H. Pilkington, P. F. Scott and R. A. Collins 1968, Nature, 217, 709-713.
- ↑ [1]