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Radio spectra of OH471 and OQ172

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Abstract

RADIO spectra for the highly redshifted z ≥ 3.40 quasars OH471 (ref. 1) and OQ172 (ref. 2) are presented here for frequencies between 16.7 MHz and 85.3 GHz. The spectra are complex. Both have a peak at or near 1.4 GHz and a second peak near or above 85 GHz. Both have a low frequency cutoff, the one for OH471 being especially sharp. OH471 sometimes seems to be variable at 31 GHz on a time scale of days but the source appears to be stable at 10.7 and 22 GHz.

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Author notes

  1. EDWARD K. CONKLIN

    Present address: National Astronomy and Ionosphere Center, Arecibo, Puerto Rico

Authors and Affiliations

  1. Ohio State University Radio Observatory, Columbus

    MIRJANA R. GEARHART & JOHN D. KRAUS

  2. National Research Council of Canada, Ottawa

    BRYAN H. ANDREW

  3. Mullard Radio Astronomy Observatory, Cavendish Laboratory, Cambridge, UK

    GLEN BLAKE, PAUL SCOTT & MARTIN RYLE

  4. Institute of Radio Physics and Electronics, Academy of Sciences Ukrainian SSR, Kharkov, USSR

    S. YA. BRAUDE, N. K. SHARYKIN & I. N. ZHOUCK

  5. Department of Physics, Queen's University, Kingston, Ontario

    ALAN H. BRIDLE

  6. National Radio Astronomy Observatory, Kitt Peak, Arizona

    EDWARD K. CONKLIN

  7. University of Texas Radio Astronomy Observatory, Austin, Texas

    JAMES N. DOUGLAS

  8. Max Planck Institut für Radioastronomie, Bonn, West Germany

    O. HACHENBERG & M. THIEL

  9. Centro de Rádio-Astronomia e Astrofísica, Universidade Mackenzie, Sao Paulo, Brazil

    PIERRE KAUFMANN

  10. CRESS-Department of Physics, York University, Toronto, Ontario

    C. R. PURTON, P. A. FELDMAN & K. A. MARSH

  11. Radio Astronomy Institute, Stanford University,

    MARK A. STULL & KENT PRICE

  12. Carnegie Institution of Washington,

    J. W. WARNER & G. ASSOUSA

  13. Lick Observatory,

    B. BALICK

Authors
  1. MIRJANA R. GEARHART
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  2. JOHN D. KRAUS
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  3. BRYAN H. ANDREW
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  4. GLEN BLAKE
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  5. PAUL SCOTT
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  6. MARTIN RYLE
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  7. S. YA. BRAUDE
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  8. N. K. SHARYKIN
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  9. I. N. ZHOUCK
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  10. ALAN H. BRIDLE
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  11. EDWARD K. CONKLIN
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  12. JAMES N. DOUGLAS
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  13. O. HACHENBERG
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  14. M. THIEL
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  15. PIERRE KAUFMANN
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  16. C. R. PURTON
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  17. P. A. FELDMAN
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  18. K. A. MARSH
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  19. MARK A. STULL
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  20. KENT PRICE
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  21. J. W. WARNER
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  23. B. BALICK
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GEARHART, M., KRAUS, J., ANDREW, B. et al. Radio spectra of OH471 and OQ172. Nature 249, 743–746 (1974). https://doi.org/10.1038/249743a0

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  • DOI: https://doi.org/10.1038/249743a0

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