Interstellar scintillation and ultra-low-frequency gravitational wave observations

Details Interstellar scintillation and ultra-low-frequency gravitational wave observations Interstellar scintillation and ultra-low-frequency gravitational wave observations

Feb 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984natur.307..527a&link_type=abstract

Nature (ISSN 0028-0836), vol. 307, Feb. 9, 1984, p. 527, 528. NASA-supported research.

Physics

29

Gravitational Waves, Pulsars, Scintillation, Extremely Low Frequencies, Interstellar Space, Noise Reduction, Power Spectra

Scientific paper

High precision pulsar timing measurements have been used to set upper limits on the flux of ultralong period (T greater than 3 years) stochastic gravitational waves. The data used to produce the current limits appear to be limited by timing noise that is intrinsic to the pulsars. Recently, however, there have been very low noise timing observations of the 1.5-millisecond pulsar. This suggests that significant sensitivity improvements in searches for ultralow frequency (ULF) gravitational waves may be possible. Here, the effects of the heretofore secondary noise source of phase scintillations caused by interstellar electron density fluctuations are calculated, and the prospects for improved ULF gravitational wave measurements using pulsar timing are discussed.

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