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Light-Echo Spectrum Reveals the Type of Tycho Brahe's 1572 Supernova

Published online by Cambridge University Press:  17 January 2013

T. Usuda ,
O. Krause ,
M. Tanaka ,
T. Hattori ,
M. Goto ,
S. M. Birkmann  and
K. Nomoto
T. Usuda
Affiliation:
SUBARU Telescope, National Astronomical Observatory of Japan, 650 North A'ohoku Place, Hilo, Hawaii, USA email: usuda@subaru.naoj.org
O. Krause
Affiliation:
Max-Planck-Institut für Astronomie, Königstuhl 17, 69117 Heidelberg, Germany
M. Tanaka
Affiliation:
Institute for the Physics and Mathematics of the Universe, University of Tokyo, Kashiwanoha 5-1-5, Kashiwa, Chiba 277-8568, Japan
T. Hattori
Affiliation:
SUBARU Telescope, National Astronomical Observatory of Japan, 650 North A'ohoku Place, Hilo, Hawaii, USA email: usuda@subaru.naoj.org
M. Goto
Affiliation:
Max-Planck-Institut für Astronomie, Königstuhl 17, 69117 Heidelberg, Germany
S. M. Birkmann
Affiliation:
Max-Planck-Institut für Astronomie, Königstuhl 17, 69117 Heidelberg, Germany
K. Nomoto
Affiliation:
Institute for the Physics and Mathematics of the Universe, University of Tokyo, Kashiwanoha 5-1-5, Kashiwa, Chiba 277-8568, Japan
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Abstract

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We successfully obtained the first optical spectra of the faint light echoes around Cassiopeia A and Tycho Brahe's supernova remnants (SNRs) with FOCAS and the Subaru Telescope. We conclude that Cas A and Tycho's SN 1572 belong to the Type IIb and normal Type Ia supernovae, respectively. Light echo spectra are important in order to obtain further insight into the supernova explosion mechanism of Tycho's SN 1572: how the Type Ia explosion actually proceeds, and whether accretion occurs from a companion or by the merging of two white dwarfs. The proximity of the SN 1572 remnant has allowed detailed studies, such as the possible identification of the binary companion, and provides a unique opportunity to test theories of the explosion mechanism and the nature of the progenitor. Future light-echo spectra, obtained in different spatial directions of SN 1572, will enable to construct a three-dimensional spectroscopic view of the explosion.

Keywords

supernovae: individual (SN 1572, Tycho's supernova)
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 7 , Issue S281: Binary Paths to Type Ia Supernovae Explosions , July 2011 , pp. 335 - 336
Copyright
Copyright © International Astronomical Union 2013

References

Krause, O., Tanaka, M., Usuda, T., Hattori, T., Goto, M., Birkmann, S. M., & Nomoto, K., 2008, Nature, 456, 617Google Scholar