Hostname: page-component-76fb5796d-9pm4c Total loading time: 0 Render date: 2024-04-26T23:39:21.888Z Has data issue: false hasContentIssue false
  • English
  • Français

Speckles in Interstellar Radio-Wave Scattering

Published online by Cambridge University Press:  12 April 2016

K. M. Desai ,
C. R. Gwinn ,
J. Reynolds ,
E. A. King ,
D. Jauncey ,
G. Nicholson ,
C. Flanagan ,
R.A. Preston  and
D.L. Jones
K. M. Desai
Affiliation:
Physics Department, UCSB, Santa Barbara, CA 93106USA
C. R. Gwinn
Affiliation:
Physics Department, UCSB, Santa Barbara, CA 93106USA
J. Reynolds
Affiliation:
Australia Telescope, PO Box 76, Epping, NSW 2121, AUSTRALIA
E. A. King
Affiliation:
Australia Telescope, PO Box 76, Epping, NSW 2121, AUSTRALIA
D. Jauncey
Affiliation:
CSIRO, PO Box 76, Epping, NSW 2121, AUSTRALIA
G. Nicholson
Affiliation:
Hartebeesthoek Radio Astronomy Observatory, P.O. Box 443, Krugersdorp 1740, SOUTH AFRICA
C. Flanagan
Affiliation:
Hartebeesthoek Radio Astronomy Observatory, P.O. Box 443, Krugersdorp 1740, SOUTH AFRICA
R.A. Preston
Affiliation:
Jet Propulsion Laboratory, 4809 Oak Grove Drive, Pasadena, CA 91109, USA
D.L. Jones
Affiliation:
Jet Propulsion Laboratory, 4809 Oak Grove Drive, Pasadena, CA 91109, USA

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Observations of speckles in the scattering disk of the Vela pulsar are presented and speckle techniques for studying and circumventing scattering of radio waves by the turbulent interstellar plasma are discussed. The speckle pattern contains, in a hologrammatic fashion, complete information on the structure of the radio source as well as the distribution of the scattering material. Speckle observations of interstellar scattering of radio waves are difficult because of their characteristically short timescales (≈seconds) and narrow bandwidths (≈kHz). Here, we present first observations, taken at 13 cm wavelength with elements of the SHEVE VLBI network, of speckles in interstellar scattering.

Type
Imaging
Information
International Astronomical Union Colloquium , Volume 131: Radio Interferometry: Theory, Techniques, and Applications , 1991 , pp. 238 - 241
Copyright
Copyright © Astronomical Society of the Pacific 1991

References

Cornwell, T.J., Anantharamaiah, K.R. and Narayan, R., 1988 Spatial Coherence in a Scatter-Broadened Image - Observations of 3C279 Close to the Sun in Radio Wave Scattering in the Interstellar Medium, AIP Conf. Proc. 174. ed. Cordes, J.M., Rickett, B.J., and Backer., D.C., pp. 92–96.Google Scholar
Thompson, A.R., Moran, J.M., and Swenson, G.W. Jr., Interferometry and Synthesis in Radio Astronomy, John Wiley & Sons, 1986.Google Scholar
Wolszczan, A. and Cordes, J.M., 1987, Interstellar Interferometry of the Pulsar PSR 1237+25. Ap. J. Let. 320, L35.Google Scholar