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First epoch VLBI observations of the gravitational lens system 2016+112

  • II. Observations
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Gravitational Lensing

Part of the book series: Lecture Notes in Physics ((LNP,volume 360))

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Abstract

VLBI data at 18 cm indicate that 2016+112 A and B have milliarcsecond structure. The A and B images can be adequately modeled with a linear magnification matrix, although a few features in each hybrid map cannot be explained by such a model. Three lens models by Narasimha, Subramanian, and Chitre (1987) and one by Narasimha and Chitre (1989) predict magnification matrices. The dark halo model by Narasimha and Chitre (1989) works best. Less than half of the VLA fluxes are seen in the respective VLBI hybrid maps, indicating some extended structures. The C component was too faint to be mapped. The VLBI flux ratio B/C is about 3.8.

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References

  • Heflin, M. B., Gorenstein, M. V., Falco, E. E., Shapiro, I. I., Burke, B. F., Hewitt, J. N., Rogers, A. E. E., and Lawrence, C. R. 1988, The Impact of VLBI on Astrophysics and Geophysics, eds. M. J. Reid and J. M. Moran (Dordrecht: Reidel), p. 209.

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  • Gorenstein, M.V., et al. 1984, Ap. J. 287, 538.

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  • Narasimha, D., Subramanian, K., and Chitre, S.M. 1987, Ap. J. 315, 434.

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  • Narasimha, D., and Chitre, S. M. 1989, A. J. 97, 327.

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Author information

Authors and Affiliations

  1. Massachusetts Institute of Technology, 26-349, Cambridge, MA

    M. B. Heflin

  2. Waters Chromatography Division, Millipore Corporation, Milford, MA

    M. V. Gorenstein

  3. California Institute of Technology, Pasadena, CA

    C. R. Lawrence

  4. Massachusetts Institute of Technology, Cambridge, MA

    B. F. Burke

  5. Harvard-Smithsonian Center for Astrophysics, Cambridge, MA

    I. I. Shapiro

Authors
  1. M. B. Heflin
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  2. M. V. Gorenstein
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  3. C. R. Lawrence
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  4. B. F. Burke
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  5. I. I. Shapiro
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Editor information

Yannick Mellier Bernard Fort Geneviève Soucail

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© 1990 Springer-Verlag

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Heflin, M.B., Gorenstein, M.V., Lawrence, C.R., Burke, B.F., Shapiro, I.I. (1990). First epoch VLBI observations of the gravitational lens system 2016+112. In: Mellier, Y., Fort, B., Soucail, G. (eds) Gravitational Lensing. Lecture Notes in Physics, vol 360. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0009248

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  • DOI: https://doi.org/10.1007/BFb0009248

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-52648-3

  • Online ISBN: 978-3-540-47087-8

  • eBook Packages: Springer Book Archive

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