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.
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References
Jauncey, D.L., et al., 1991, Nature, 352, 132
Jones, D.L. 1994, in Compact Extragalactic Radio Sources, ed. J.A. Zensus & K.I. Kellermann (Socorro: NRAO), 135
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© 1996 International Astronomical Union
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Jones, D.L. et al. (1996). Interstellar Scattering and the Einstein Ring PKS 1830–211. In: Kochanek, C.S., Hewitt, J.N. (eds) Astrophysical Applications of Gravitational Lensing. International Astronomical Union / Union Astronomique Internationale, vol 173. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-0221-3_98
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DOI: https://doi.org/10.1007/978-94-009-0221-3_98
Publisher Name: Springer, Dordrecht
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