Volume 453, Number 2, July II 2006
|Page(s)||595 - 599|
|Section||Interstellar and circumstellar matter|
|Published online||16 June 2006|
Interstellar scintillation of PSR J0437–4715 on two scales
Department of Physics, University of California, Santa Barbara, CA 93106, USA e-mail: [cgwinn;hirano]@physics.ucsb.edu
2 Department of Astronomy and Astrophysics, University of Chicago, Chicago, IL 60637, USA e-mail: email@example.com
Accepted: 13 March 2006
Aims.We sought to determine the scale of scintillation in the interstellar plasma of PSR J0437-4715.
Methods.We used the Very Long Baseline Array to obtain scintillation amplitude and phase data, from dynamic spectra at 327 MHz.
Results.We observe two scales of scintillation of pulsar PSR J0437-4715, differing by more than an order of magnitude in scintillation bandwidth. The wider-bandwidth scale of scintillation that we observe indicates less scattering for this pulsar than for other nearby pulsars, other than PSR B0950+08.
Key words: turbulence / pulsars: individual: PSR J0437-4715 / scattering
© ESO, 2006
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