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Detection of strong iron emission from quasars at redshift z > 3

Nature volume 367, pages 250–251 (1994)Cite this article

Abstract

QUASARS are distant, luminous objects generally thought to be powered by the accretion of gas onto a supermassive black hole1; their spectra are characterized by broad emission lines originating from a dense region close to the central energy source1. The best-studied spectral region in low-redshift quasars is near the Hβ line at 4,861 Å (in the quasar rest frame) where there are also lines arising from singly ionized iron and doubly ionized oxygen. New technology has enabled us to detect strong iron emission in the spectra of the high-redshift (z > 3) quasars Q0014 + 813 and Q0663 + 680, in which these lines are redshifted to the near-infrared. The strength of this emission suggests an iron abundance (relative to hydrogen) higher than in the solar neighbourhood. This high iron abundance supports the view that quasars are located in the centres of massive galaxies. If type Ia supernovae are responsible for the iron enrichment2, significant star formation must have taken place in the host galaxies at least one billion years earlier, providing a constraint on the age of the Universe at that redshift.

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References

  1. Osterbrock, D. E. & Mathews, W. G. A. Rev. Astr. Astrophys. 24, 171–203 (1986).

    Article  ADS  CAS  Google Scholar 

  2. Matteucci, F. & Greggio, L. Astr. Astrophys. 154, 279–287 (1986).

    ADS  CAS  Google Scholar 

  3. Wampler, E. J. & Oke, J. B. Astrophys. J. 148, 695–704 (1967).

    Article  ADS  CAS  Google Scholar 

  4. Sargent, W. L. W. Astrophys. J. 152, L31–L34 (1968).

    Article  ADS  CAS  Google Scholar 

  5. Osterbrock, D. E. Astrophys. J. 215, 733–745 (1977).

    Article  ADS  CAS  Google Scholar 

  6. Phillips, M. M. Astrophys. J. Suppl. Ser. 38, 187–203 (1978).

    Article  ADS  CAS  Google Scholar 

  7. Bergeron, J. & Kunth, D. Mon. Not. R. astr. Soc. 207, 263–286 (1984).

    Article  ADS  CAS  Google Scholar 

  8. Boroson, T. A. & Green, R. F. Astrophys. J. Suppl. Ser. 80, 109–135 (1992).

    Article  ADS  CAS  Google Scholar 

  9. Collin-Souffrin, S. et al. Astr. Astrophys. 166, 27–35 (1986).

    ADS  CAS  Google Scholar 

  10. Lipari, S., Macchetto, F. D. & Golombeck, D. Astrophys. J. 366, L65–L67 (1991).

    Article  ADS  CAS  Google Scholar 

  11. Lawrence, A. et al. Mon. Not. R. astr. Soc. 235, 261–268 (1988).

    Article  ADS  CAS  Google Scholar 

  12. Bergeron, J. & Kunth, D. Astr. Astrophys 85, L11–L14 (1980).

    ADS  CAS  Google Scholar 

  13. Boksenberg, A. et al. Mon. Not. R. astr. Soc. 178, 451–166 (1977).

    Article  ADS  CAS  Google Scholar 

  14. Krolik, J. H. & Kallman, T. R. Astrophys. J. 324, 714–720 (1988).

    Article  ADS  CAS  Google Scholar 

  15. Netzer, H. & Wills, B. J. Astrophys. J. 275, 445–460 (1983).

    Article  ADS  CAS  Google Scholar 

  16. Hill, G. J., Thompson, K. L. & Elston, R. Astrophys. J. 414, L1–L4 (1993).

    Article  ADS  CAS  Google Scholar 

  17. Lipari, S., Terlevich, R. & Macchetto, F. Astrophys. J. 406, L451–L456 (1993).

    Article  ADS  Google Scholar 

  18. Penston, M. V. Mon. Not. R. astr. Soc. 229, 1P–5P (1987).

    Article  ADS  CAS  Google Scholar 

  19. Miley, G. K. & Miller, J. S. Astrophys. J. 228, L55–L58 (1979).

    Article  ADS  CAS  Google Scholar 

  20. Steiner, J. E. Astrophys, J. 250, 469–477 (1981).

  21. Boroson, T. A. & Oke, J. B. Astrophys. J. 281, 535–544 (1984).

    Article  ADS  CAS  Google Scholar 

  22. Kühr, H. et al. Astr. J. 86, 854–863 (1981).

    Article  ADS  Google Scholar 

  23. Pauliny-Toth, I. I. K. et al. Astr. J. 83, 451–474 (1978).

    Article  ADS  Google Scholar 

  24. Carswell, R. F. et al. Astrophys. J. 381, L5–L8 (1991).

    Article  ADS  CAS  Google Scholar 

  25. Biermann, P. L. et al. Astr. Astrophys. Suppl. Ser. 96, 339–349 (1992).

    ADS  Google Scholar 

  26. Wilkes, B. J., Elvis, M. & McHardy, I. Astrophys. J. 321, L23–L27 (1987).

    Article  ADS  CAS  Google Scholar 

  27. Boroson, T. A. Astrophys. J. 343, L9–L12 (1989).

    Article  ADS  CAS  Google Scholar 

  28. Kühr, H. et al. Astrophys. J. 284, L5–L8 (1984).

    Article  ADS  Google Scholar 

  29. Wills, B. J., Nezter, H. & Wills, D. Astrophys. J. 288, 94–116 (1985).

    Article  ADS  CAS  Google Scholar 

  30. Wheeler, J. C. Sneden, C. & Truran, J. W. Ann. Rev. Astr. Astrophys. 27, 279–349 (1989).

    Article  ADS  CAS  Google Scholar 

  31. Iben, I. Jr. & Tutukov, A. V. Astrophys. J. Suppl. Ser. 54, 335–372 (1984).

    Article  ADS  CAS  Google Scholar 

  32. Hamann, F. & Ferland, G. Astrophys. J. 391, L53–L57 (1992).

    Article  ADS  CAS  Google Scholar 

  33. Hamann, F. & Ferland, G. Astrophys. J. 418, 11–27 (1993).

    Article  ADS  CAS  Google Scholar 

Download references

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Authors and Affiliations

  1. Cerro Tololo Inter-American Observatory, Casilla 603, La Serena, Chile

    Richard Elston

  2. Naval Research Laboratory, Code 7210, 4555 Overlook Avenue SW, Washington, DC, 20375, USA

    Keith L. Thompson

  3. McDonald Observatory University of Texas at Austin, RLM 15.308, Austin, Texas, 78712, USA

    Gary J. Hill

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  1. Richard Elston
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  2. Keith L. Thompson
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  3. Gary J. Hill
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Elston, R., Thompson, K. & Hill, G. Detection of strong iron emission from quasars at redshift z > 3. Nature 367, 250–251 (1994). https://doi.org/10.1038/367250a0

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