Location via proxy:   [ UP ]  
[Report a bug]   [Manage cookies]                
Skip to main content

Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtain the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles and JavaScript.

  • Article
  • Published:

0957 + 561 A, B: twin quasistellar objects or gravitational lens?

Nature volume 279, pages 381–384 (1979)Cite this article

0957 + 561 A, B are two QSOs of mag 17 with 5.7 arc s separation at redshift 1.405. Their spectra leave little doubt that they are associated. Difficulties arise in describing them as two distinct objects and the possibility that they are two images of the same object formed by a gravitational lens is discussed.

This is a preview of subscription content, access via your institution

Access options

Buy this article

  • Purchase on SpringerLink
  • Instant access to full article PDF
Buy now

Prices may be subject to local taxes which are calculated during checkout

Fig. 1
Fig. 2
Fig. 3

References

  1. Cohen, A. M., Porcas, R. W., Browne, I. W. A., Daintree, E. J. & Walsh, D. Mem. R. astr. Soc. 84, 1 (1977).

    ADS  Google Scholar 

  2. Porcas, R. W. et al. Mon. Not. R. astr. Soc. (submitted).

  3. Stockton, A. N. Astrophys. J. 223, 747 (1978).

    Article  ADS  Google Scholar 

  4. Weymann, R. J., Williams, R. E., Peterson, B. M. & Turnshek, D. A. Astrophys. J. (submitted).

  5. Wolfe, A. M., Broderick, J. J., Condon, J. J. & Johnston, K. J. Astrophys. J. Lett. 208, L47 (1976).

    Article  ADS  CAS  Google Scholar 

  6. Sanitt, N. Nature 234, 199 (1971).

    Article  ADS  Google Scholar 

  7. Schechter, P. Astrophys. J. 203, 297 (1976).

    Article  ADS  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. ∗University of Manchester, Nuffield Radio Astronomy Laboratories, Jodrell Bank, Macclesfield, Cheshire, UK https://www.nature.com/nature

    D. Walsh∗

  2. †Institute of Astronomy, Cambridge, UK https://www.nature.com/nature

    R. F. Carswell†

  3. ‡Steward Observatory, University of Arizona, Tucson, Arizona 85721 https://www.nature.com/nature

    R. J. Weymann‡

Authors
  1. D. Walsh∗
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. R. F. Carswell†
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. R. J. Weymann‡
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Walsh∗, D., Carswell†, R. & Weymann‡, R. 0957 + 561 A, B: twin quasistellar objects or gravitational lens?. Nature 279, 381–384 (1979). https://doi.org/10.1038/279381a0

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1038/279381a0

This article is cited by

Search

Advanced search

Quick links

Nature Briefing

Sign up for the Nature Briefing newsletter — what matters in science, free to your inbox daily.

Get the most important science stories of the day, free in your inbox. Sign up for Nature Briefing