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Session 46 - Interstellar Scattering and Scintillation as Tools in Radio Astronomy.
Topical, Oral session, Tuesday, June 09

[46.07] Nanoarcsecond Structure of the Vela Pulsar via Interstellar Scattering

C. R. Gwinn, M. C. Britton (UC Santa Barbara), J. E. Reynolds, D. L. Jauncey, E. A. King (Australia Telescope), H. Hirabayashi, H. Kobayashi, Y. Murata, P. G. Edwards (ISAS), B. Carlson (Dominion RAO), P. M. McCulloch, J. E. J. Lovell (U. Tasmania), C. S. Flanagan, D. P. Smits (Hartebeesthoek RAO), R. A. Preston (JPL)

We study the radio emission region of the Vela pulsar at nanoarcsecond angular resolution, using scattering in the Vela supernova remnant as an AU-scale lens. We present results of interferometric observations with ground-based radiotelescopes and the HALCA orbiting radiotelescope, and the resulting picture of the pulsar's emission region. We suggest that radio-wave refraction within the pulsar's magnetosphere may explain this structure.

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Program listing for Tuesday