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

Abstract

Type Ia supernovae are thermonuclear explosions of white dwarf stars in close binary systems1. They play an important role as cosmological distance indicators and have led to the discovery of the accelerated expansion of the Universe2,3. Among the most important unsolved questions4 about supernovae are how the explosion actually proceeds and whether accretion occurs from a companion or by the merging of two white dwarfs. Tycho Brahe’s supernova of 1572 (SN 1572) is thought to be one of the best candidates for a type Ia supernova in the Milky Way5. The proximity of the SN 1572 remnant has allowed detailed studies, such as the possible identification of the binary companion6, and provides a unique opportunity to test theories of the explosion mechanism and the nature of the progenitor. The determination of the hitherto unknown7,8,9 spectroscopic type of this supernova is crucial in relating these results to the diverse population of type Ia supernovae10. Here we report an optical spectrum of Tycho’s supernova near maximum brightness, obtained from a scattered-light echo more than four centuries after the direct light from the explosion swept past the Earth. We find that SN 1572 belongs to the majority class of normal type Ia supernovae.

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Figure 1: Optical images of the SN 1572 light echo.
Figure 2: Spectrum of SN 1572 and comparison spectra of normal type Ia supernovae.
Figure 3: Comparison of SN 1572 with type Ia supernovae of different luminosities.

References

  1. 1

    Nomoto, K., Thielemann, F.-K. & Yokoi, K. Accreting white dwarf models of Type I supernovae. III - Carbon deflagration supernovae. Astrophys. J. 286, 644–658 (1984)

    ADS  Article  Google Scholar 

  2. 2

    Riess, A. G. et al. Observational evidence from supernovae for an accelerating universe and a cosmological constant. Astron. J. 116, 1009–1038 (1998)

    ADS  Article  Google Scholar 

  3. 3

    Perlmutter, S. et al. Measurements of Omega and Lambda from 42 high-redshift supernovae. Astrophys. J. 517, 565–586 (1999)

    ADS  Article  MATH  Google Scholar 

  4. 4

    Hillebrandt, W. & Niemeyer, J. C. Type Ia supernova explosion models. Annu. Rev. Astron. Astrophys. 38, 191–230 (2000)

    ADS  Article  Google Scholar 

  5. 5

    Baade, W. B Cassiopeiae as a supernova of type I. Astrophys. J. 102, 309–317 (1945)

    ADS  Article  Google Scholar 

  6. 6

    Ruiz-Lapuente, P. et al. The binary progenitor of Tycho Brahe’s 1572 supernova. Nature 431, 1069–1072 (2004)

    ADS  Article  PubMed  Google Scholar 

  7. 7

    Ruiz-Lapuente, P. Tycho Brahe’s supernova: light from centuries past. Astrophys. J. 612, 357–363 (2004)

    ADS  Article  Google Scholar 

  8. 8

    van den Bergh, S. Was Tycho’s supernova a subluminous supernova of type Ia? Astrophys. J. 413, 67–69 (1993)

    ADS  Article  Google Scholar 

  9. 9

    Schaefer, B. The peak brightnesses of historical supernovae and the Hubble constant. Astrophys. J. 459, 438–454 (1996)

    ADS  Article  Google Scholar 

  10. 10

    Branch, D. et al. Comparative direct analysis of type Ia supernova spectra. II. Maximum light. Publ Astron. Soc. Pacif. 118, 560–571 (2006)

    ADS  Article  Google Scholar 

  11. 11

    Brahe, T. in Opera Omnia Vol. 2 (ed. Dreyer, I. L. E.) 307 (Swets & Zeitlinger, 1972)

    Google Scholar 

  12. 12

    Doggett, J. B. & Branch, D. A comparative study of supernova light curves. Astron. J. 90, 2303–2311 (1985)

    ADS  Article  Google Scholar 

  13. 13

    Decourchelle, A. et al. XMM-Newton observations of the Tycho supernova remnant. Astron. Astrophys. 365, L218–L224 (2001)

    ADS  Article  Google Scholar 

  14. 14

    Krause, O. et al. Infrared echoes near the supernova remnant Cas A. Science 308, 1604–1606 (2005)

    ADS  Article  PubMed  Google Scholar 

  15. 15

    Rest, A. et al. Scattered-light echoes from the historical galactic supernovae Cassiopeia A and Tycho (SN 1572). Astrophys. J. 681, L81–L84 (2008)

    ADS  Article  Google Scholar 

  16. 16

    Krause, O. et al. The Cassiopeia A supernova was of type IIb. Science 320, 1195–1197 (2008)

    ADS  Article  PubMed  Google Scholar 

  17. 17

    Rest, A. et al. Spectral identification of an ancient supernova using light echoes in the Large Magellanic Cloud. Astrophys. J. 680, 1137–1148 (2008)

    ADS  Article  Google Scholar 

  18. 18

    Filippenko, A. Optical spectra of supernovae. Annu. Rev. Astron. Astrophys. 35, 309–355 (1997)

    ADS  Article  Google Scholar 

  19. 19

    Nugent, P., Kim, A. & Perlmutter, S. K-corrections and extinction corrections for type Ia supernovae. Publ Astron. Soc. Pacif. 114, 803–819 (2002)

    ADS  Article  Google Scholar 

  20. 20

    Filippenko, A. et al. The subluminous, spectroscopically peculiar type IA supernova 1991bg in the elliptical galaxy NGC 4374. Astron. J. 104, 1543–1556 (1992)

    ADS  Article  Google Scholar 

  21. 21

    Filippenko, A. et al. The peculiar type IA SN 1991T - Detonation of a white dwarf? Astrophys. J. 384, L15–L18 (1992)

    ADS  Article  Google Scholar 

  22. 22

    Phillips, M. M. et al. The reddening-free decline rate versus luminosity relationship for type Ia supernovae. Astron. J. 118, 1766–1776 (1999)

    ADS  Article  Google Scholar 

  23. 23

    Völk, H. et al. Internal dynamics and particle acceleration in Tycho’s SNR. Astron. Astrophys. 483, 529–535 (2008)

    ADS  Article  Google Scholar 

  24. 24

    Gonzalez Hernandez, J. et al. The chemical abundances of Tycho G in supernova remnant 1572. Astrophys. J. (in the press); preprint at 〈http://arxiv.org/abs/0809.0601〉 (2008)

  25. 25

    Mazzali, P. A. et al. High-velocity features: A ubiquitous property of type Ia supernovae. Astrophys. J. 623, L37–L40 (2005)

    ADS  Article  Google Scholar 

  26. 26

    Wang, L. et al. Spectropolarimetry of SN 2001el in NGC 1448: Asphericity of a normal type Ia supernova. Astrophys. J. 591, 1110–1128 (2003)

    ADS  Article  Google Scholar 

  27. 27

    Mattila, S. et al. Early and late time VLT spectroscopy of SN 2001el — progenitor constraints for a type Ia supernova. Astron. Astrophys. 443, 649–662 (2003)

    ADS  Article  Google Scholar 

  28. 28

    Kasen, D. et al. Analysis of the flux and polarization spectra of the type Ia supernova SN 2001el: Exploring the geometry of the high-velocity ejecta. Astrophys. J. 593, 788–808 (2003)

    ADS  Article  Google Scholar 

  29. 29

    Tanaka, M. et al. Three-dimensional models for high-velocity features in type Ia supernovae. Astrophys. J. 645, 470–479 (2006)

    ADS  Article  Google Scholar 

  30. 30

    Sparks, W. B. et al. V838 Monocerotis: a geometric distance from Hubble Space Telescope polarimetric imaging of its light echo. Astron. J. 135, 605–617 (2008)

    ADS  Article  Google Scholar 

Download references

Acknowledgements

This work is based on data collected at the Subaru Telescope, which is operated by the National Astronomical Observatory of Japan, and the German–Spanish Astronomical Center, Calar Alto, jointly operated by the Max-Planck-Institut für Astronomie Heidelberg and the Instituto de Astrofísica de Andalucía. We thank U. Thiele and the Calar Alto observers for their support. M.T. is supported by the Japan Society for the Promotion of Science Research Fellowship for Young Scientists. This research has been supported in part by the World Premier International Research Center Initiative, MEXT, Japan.

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Correspondence to Oliver Krause or Ken’ichi Nomoto.

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Krause, O., Tanaka, M., Usuda, T. et al. Tycho Brahe’s 1572 supernova as a standard type Ia as revealed by its light-echo spectrum. Nature 456, 617–619 (2008). https://doi.org/10.1038/nature07608

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