A NON-RADIAL OSCILLATION MODEL FOR PULSAR STATE SWITCHING
- NRAO, P.O. Box 2, Green Bank, WV 24944 (United States)
- Department of Physics, West Virginia University, 436 Hodges Hall, Morgantown, WV 26506 (United States)
Pulsars are unique astrophysical laboratories because of their clock-like timing precision, providing new ways to test general relativity and detect gravitational waves. One impediment to high-precision pulsar timing experiments is timing noise. Recently, Lyne et al. showed that the timing noise in a number of pulsars is due to quasi-periodic fluctuations in the pulsars' spin-down rates and that some of the pulsars have associated changes in pulse profile shapes. Here we show that a non-radial oscillation model based on asteroseismological theory can explain these quasi-periodic fluctuations. Application of this model to neutron stars will increase our knowledge of neutron star emission and neutron star interiors and may improve pulsar timing precision.
- OSTI ID:
- 21560497
- Journal Information:
- Astrophysical Journal Letters, Vol. 728, Issue 1; Other Information: DOI: 10.1088/2041-8205/728/1/L19; ISSN 2041-8205
- Country of Publication:
- United States
- Language:
- English
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