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Type IIn supernovae at redshift z ≈ 2 from archival data

Author

Listed:
  • Jeff Cooke

    (Center for Cosmology, University of California, Irvine, California 92697-4574, USA)

  • Mark Sullivan

    (University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, UK)

  • Elizabeth J. Barton

    (Center for Cosmology, University of California, Irvine, California 92697-4574, USA)

  • James S. Bullock

    (Center for Cosmology, University of California, Irvine, California 92697-4574, USA)

  • Ray G. Carlberg

    (University of Toronto, Toronto, Ontario M5S 3H4, Canada)

  • Avishay Gal-Yam

    (Benoziyo Center for Astrophysics, Weizmann Institute of Science)

  • Erik Tollerud

    (Center for Cosmology, University of California, Irvine, California 92697-4574, USA)

Abstract

Two supernovae at z > 2 Supernovae provide valuable opportunities to study galactic processes from the local Universe to large distances, but their properties and the sensitivities of current telescopes make the detection of high-redshift examples extremely difficult. Previous searches have revealed core-collapse (type II) supernovae to z ≈ 0.7 and thermonuclear (type Ia) to z ≈1.5. Now by exploiting the exceptional properties of sub-class type IIn core-collapse supernovae — including extreme brightness in the ultraviolet and bright, long-lived emission lines — Cooke et al. report the discovery in archival data of three previously unknown supernovae at redshifts z = 0.808, 2.013 and 2.357. The study of objects with redshifts z > 2 provides a window on the Universe at a time shortly after the formation of the first stars.

Suggested Citation

  • Jeff Cooke & Mark Sullivan & Elizabeth J. Barton & James S. Bullock & Ray G. Carlberg & Avishay Gal-Yam & Erik Tollerud, 2009. "Type IIn supernovae at redshift z ≈ 2 from archival data," Nature, Nature, vol. 460(7252), pages 237-239, July.
    • Handle: RePEc:nat:nature:v:460:y:2009:i:7252:d:10.1038_nature08082
    DOI: 10.1038/nature08082
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