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Interstellar Scattering And The Einstein Ring PKS 1830-211

Published online by Cambridge University Press:  25 May 2016

D.L. Jones ,
R.A. Preston ,
D.W. Murphy ,
D.L. Meier ,
D.L. Jauncey ,
J.E. Reynolds  and
A.K. Tzioumis
D.L. Jones
Affiliation:
Jet Propulsion Laboratory, Mail Code 238-332, 4800 Oak Grove Drive, Pasadena, CA. 91109, USA
R.A. Preston
Affiliation:
Jet Propulsion Laboratory, Mail Code 238-332, 4800 Oak Grove Drive, Pasadena, CA. 91109, USA
D.W. Murphy
Affiliation:
Jet Propulsion Laboratory, Mail Code 238-332, 4800 Oak Grove Drive, Pasadena, CA. 91109, USA
D.L. Meier
Affiliation:
Jet Propulsion Laboratory, Mail Code 238-332, 4800 Oak Grove Drive, Pasadena, CA. 91109, USA
D.L. Jauncey
Affiliation:
Australia Telescope National Facility, CSIRO, PO Box 76, Epping 2121, NSW, Australia
J.E. Reynolds
Affiliation:
Australia Telescope National Facility, CSIRO, PO Box 76, Epping 2121, NSW, Australia
A.K. Tzioumis
Affiliation:
Australia Telescope National Facility, CSIRO, PO Box 76, Epping 2121, NSW, Australia

Abstract

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The remarkably strong radio gravitational lens PKS 1830-211 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.

Type
Chapter 9: Observational Developments
Information
Symposium - International Astronomical Union , Volume 173: Astrophysical Applications of Gravitational Lensing , 1996 , pp. 345 - 346
Copyright
Copyright © Kluwer 1996 

References

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