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Interstellar Scattering and the Einstein Ring PKS 1830–211

  • D. L. Jones
  • R. A. Preston
  • D. W. Murphy
  • D. L. Meier
  • D. L. Jauncey
  • J. E. Reynolds
  • A. K. Tzioumis
Part of the International Astronomical Union / Union Astronomique Internationale book series (IAUS, volume 173)

Abstract

The remarkably strong radio gravitational lens PKS 1830211 consists of a one arcsecond diameter Einstein ring with two bright compact components located on opposite sides of the ring. We have obtained 22 GHz VLBA data on this source to determine the intrinsic angular sizes of the compact components. Previous VLBI observations at lower frequencies indicate that the brightness temperatures of these components are significantly lower than 1010 K (Jauncey et al. 1991), less than is typical for compact synchrotron radio sources and less than is implied by flux density variations. A possible explanation is that interstellar scattering is broadening the apparent angular size of the source and thereby reducing the observed brightness temperature. Our VLBA data support this hypothesis.

Keywords

Brightness Temperature Angular Size Flux Density Variation Flux Density Scale Compact Component 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

References

  1. Jauncey, D.L., et al., 1991, Nature, 352, 132ADSCrossRefGoogle Scholar
  2. Jones, D.L. 1994, in Compact Extragalactic Radio Sources, ed. J.A. Zensus & K.I. Kellermann (Socorro: NRAO), 135Google Scholar

Copyright information

© International Astronomical Union 1996

Authors and Affiliations

  • D. L. Jones
    • 1
  • R. A. Preston
    • 1
  • D. W. Murphy
    • 1
  • D. L. Meier
    • 1
  • D. L. Jauncey
    • 2
  • J. E. Reynolds
    • 2
  • A. K. Tzioumis
    • 2
  1. 1.Jet Propulsion LaboratoryPasadenaUSA
  2. 2.Australia Telescope National Facility, CSIROEppingAustralia

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