Skip to main content
SpringerLink
Log in

Multi-Frequency VLBI Observations of B0218+357

  • Conference paper
Astrophysical Applications of Gravitational Lensing

Part of the book series: International Astronomical Union / Union Astronomique Internationale ((IAUS,volume 173))

Abstract

We present the results from VLBI observations at three frequencies of the gravitational lens system B0218+357. From the source double structure, seen in both the A and B images at 15 GHz, we have derived a relative magnification matrix, and we show that the lens mass distribution must be non-spherical. We investigate how far the matrix parameters derived from 15 GHz observations can be used to relate the A and B images at 1.7 and 5 GHz, where the image sizes are much larger.

This is a preview of subscription content, log in via an institution to check access.

Access this chapter

Log in via an institution
Chapter
USD 29.95
Price excludes VAT (USA)
  • Available as PDF
  • Read on any device
  • Instant download
  • Own it forever
eBook
USD 39.99
Price excludes VAT (USA)
  • Available as PDF
  • Read on any device
  • Instant download
  • Own it forever
Softcover Book
USD 54.99
Price excludes VAT (USA)
  • Compact, lightweight edition
  • Dispatched in 3 to 5 business days
  • Free shipping worldwide - see info

Tax calculation will be finalised at checkout

Purchases are for personal use only

Institutional subscriptions

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Similar content being viewed by others

References

  • Narasimha, D. & Patnaik, A.R., 1994, in Gravitational lenses in the Universe, eds. Surdej et al., (Liège: Université de Liège), 295

    Google Scholar 

  • Patnaik, A.R., Browne, I.W.A., King, L.J., Muxlow, T.W.B., Walsh, D. & Wilkinson, P.N., 1993, MNRAS, 261, 435

    ADS  Google Scholar 

  • Patnaik, A.R., Porcas, R.W., Browne, I.W.A., Muxlow, T.W.B., Narasimha, D., 1994, in Compact Extragalactic Sources, eds. Zensus & Kellermann, NRAO, 129

    Google Scholar 

  • Patnaik, A.R., Porcas, R.W. & Browne, I.W.A, 1995, MNRAS, 274, 5p

    ADS  Google Scholar 

  • Polatidis, A.G., Wilkinson, P.N., Xu, W., Readhead, A.C.S., Pearson, T.J., Taylor, G.B. & Vermeulen, R.C., 1995, ApJSup, 98, 1

    Article  ADS  Google Scholar 

  • Porcas, R.W. & Patnaik, A.R., 1995, in 10th working Meeting on European VLBI for Geodesy and Astrometry, Matera, in press

    Google Scholar 

  • Refsdal, S., 1964, MNRAS, 128, 307

    MathSciNet  ADS  MATH  Google Scholar 

  • Shaffer, D.B. 1994, in Compact Extragalactic Sources, eds. Zensus & Kellermann, NRAO, 132

    Google Scholar 

  • Xu, W., Readhead, A.C.S., Pearson, T.J., Polatidis, A.G., & Wilkinson, PN., 1995, ApJSup, in press

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121, Bonn, Germany

    Richard W. Porcas & Alok R. Patnaik

Authors
  1. Richard W. Porcas
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Alok R. Patnaik
    View author publications

    You can also search for this author in PubMed Google Scholar

Editor information

Editors and Affiliations

  1. Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, USA

    C. S. Kochanek

  2. MIT, Cambridge, MA, USA

    J. N. Hewitt

Rights and permissions

Reprints and permissions

Copyright information

© 1996 International Astronomical Union

About this paper

Cite this paper

Porcas, R.W., Patnaik, A.R. (1996). Multi-Frequency VLBI Observations of B0218+357. 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_89

Download citation

  • DOI: https://doi.org/10.1007/978-94-009-0221-3_89

  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-0-7923-3955-7

  • Online ISBN: 978-94-009-0221-3

  • eBook Packages: Springer Book Archive

Publish with us

Policies and ethics

Search

Navigation