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Tycho Brahe’s 1572 supernova as a standard type Ia as revealed by its light-echo spectrum

Author

Listed:
  • Oliver Krause

    (Max-Planck-Institut für Astronomie, Königstuhl 17, 69117 Heidelberg, Germany)

  • Masaomi Tanaka

    (Institute for the Physics and Mathematics of the Universe, University of Tokyo, Kashiwanoha 5-1-5, Kashiwa, Chiba 277-8568, Japan
    Graduate School of Science, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, Japan)

  • Tomonori Usuda

    (SUBARU Telescope, National Astronomical Observatory of Japan, 650 North A’ohoku Place, Hilo, Hawaii, USA)

  • Takashi Hattori

    (SUBARU Telescope, National Astronomical Observatory of Japan, 650 North A’ohoku Place, Hilo, Hawaii, USA)

  • Miwa Goto

    (Max-Planck-Institut für Astronomie, Königstuhl 17, 69117 Heidelberg, Germany)

  • Stephan Birkmann

    (Max-Planck-Institut für Astronomie, Königstuhl 17, 69117 Heidelberg, Germany
    European Space Agency, Keplerlaan 1, 2200 AG Noordwijk, The Netherlands)

  • Ken’ichi Nomoto

    (Institute for the Physics and Mathematics of the Universe, University of Tokyo, Kashiwanoha 5-1-5, Kashiwa, Chiba 277-8568, Japan
    Graduate School of Science, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, Japan)

Abstract

Tycho's supernova true to type Ia Type Ia supernovae, used as distance indicators by cosmologists, result from thermonuclear explosions of white dwarf stars in binary systems. Important questions remain about how the explosions proceed and the nature of the progenitors. A nearby example would be a help in finding the answers; now we have one. The recent discovery of light echoing from Tycho Brahe's supernova of 1572, and now the determination of its optical spectrum, confirm the suspicion that 'SN 1572' is in fact a type Ia supernova in our cosmological backyard, the Milky Way. This puts stringent constraints on explosion models that can now be compared in detail to observations of both the explosion 436 years ago and the remnant as we see it today.

Suggested Citation

  • Oliver Krause & Masaomi Tanaka & Tomonori Usuda & Takashi Hattori & Miwa Goto & Stephan Birkmann & Ken’ichi Nomoto, 2008. "Tycho Brahe’s 1572 supernova as a standard type Ia as revealed by its light-echo spectrum," Nature, Nature, vol. 456(7222), pages 617-619, December.
    • Handle: RePEc:nat:nature:v:456:y:2008:i:7222:d:10.1038_nature07608
    DOI: 10.1038/nature07608
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