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Nanoarcsecond single-dish imaging of the Vela pulsar | | J.-P. Macquart
; S. Johnston
; M. Walker
; D. Stinebring
; | | Date: |
21 Dec 1999 | | Subject: | astro-ph | | Affiliation: | University of Sydney, Oberlin College | | Abstract: | We have measured the properties of the diffractive scintillation toward the Vela pulsar under the extremely strong scattering conditions encountered at 660 MHz. We obtain a decorrelation bandwidth of $
u_d = 244 pm 4$ Hz and diffractive decorrelation timescale of $t_{
m diff} = 3.3pm 0.3$ s. Our measurement of the modulation indices $m=0.87pm 0.003pm 0.05$ and $m=0.93pm 0.03 pm 0.05$ (one for each polarization stream), are at variance with the modulation index of the Vela pulsar obtained at 2.3 GHz by Gwinn et al. (1997) {it if} the deviation from a modulation index of unity is ascribed to a source size effect. | | Source: | arXiv, astro-ph/0001368 | | Services: | Forum | Review | PDF | Favorites | |
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