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

  title={Tycho Brahe’s 1572 supernova as a standard type Ia as revealed by its light-echo spectrum},
  author={O. Krause and Masaomi Tanaka and T. Usuda and T. Hattori and M. Goto and S. Birkmann and K. Nomoto},
Type Ia supernovae are thermonuclear explosions of white dwarf stars in close binary systems. They play an important role as cosmological distance indicators and have led to the discovery of the accelerated expansion of the Universe. Among the most important unsolved questions 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… Expand
No hot and luminous progenitor for Tycho’s supernova
Type Ia supernovae have proven vital to our understanding of cosmology, both as standard candles and for their role in galactic chemical evolution; however, their origin remains uncertain. TheExpand
Astrophysics: Echo from an ancient supernova
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 the authors' cosmological backyard, the Milky Way. Expand
Surviving companions of Type Ia supernovae: theory and observations
Abstract We review the theoretical background and the observational searches made for surviving companions of Type Ia supernovae (SNe Ia). Theory comprises the characteristics of the stellar binaryExpand
X-ray studies of supernova remnants: A different view of supernova explosions
  • C. Badenes
  • Physics, Medicine
  • Proceedings of the National Academy of Sciences
  • 2010
The most relevant results on supernova remnants obtained during the first decade of Chandra and the impact that these results have had on open issues in supernova research are reviewed. Expand
Improved Hubble Space Telescope Proper Motions for Tycho-G and Other Stars in the Remnant of Tycho's Supernova 1572
With archival and new Hubble Space Telescope observations we have refined the space-velocity measurements of the stars in the central region of the remnant of Tycho’s supernova (SN) 1572, one of theExpand
Tycho-B: an unlikely companion for SN 1572*
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The Supernova -- Supernova Remnant Connection
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A solar-type star polluted by calcium-rich supernova ejecta inside the supernova remnant RCW 86
When a massive star in a binary system explodes as a supernova, its companion star may be polluted with heavy elements from the supernova ejecta. Such pollution has been detected in a handful ofExpand
The detection of a light echo from SN 2007AF
Type Ia supernovae are widely studied for their uniform properties, which make them ideal candidates for cosmological surveys. Although these exploding stars are popular targets, key fundamentalExpand


The binary progenitor of Tycho Brahe's 1572 supernova
A survey of the central region of Tycho's supernova remnant, around the position of the explosion, finds a type G0–G2 star, similar to the authors' Sun in surface temperature and luminosity (but lower surface gravity), which appears to be the surviving companion of the supernova. Expand
Spectral identification of an ancient supernova using light echoes in the large magellanic cloud
We report the successful identification of the type of the supernova responsible for the supernova remnant SNR 0509-675 in the Large Magellanic Cloud (LMC) using Gemini spectra of surrounding lightExpand
Tycho Brahe's Supernova: Light from Centuries Past
The light curve of SN 1572 is described in the terms used nowadays to characterize Type Ia supernovae (SNe Ia). By assembling the records of the observations done in 1572-1574 and evaluating theirExpand
The Chemical Abundances of Tycho G in Supernova Remnant 1572
We present an analysis of the chemical abundances of the star Tycho G in the direction of the remnant of supernova (SN) 1572, based on Keck high-resolution optical spectra. The stellar parameters ofExpand
Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
We present spectral and photometric observations of 10 Type Ia supernovae (SNe Ia) in the redshift range 0.16 " z " 0.62. The luminosity distances of these objects are determined by methods thatExpand
Optical spectra of supernovae
The temporal evolution of the optical spectra of various types of supernovae (SNe) is illustrated, in part to aid observers classifying supernova candidates. Type II SNe are defined by the presenceExpand
Scattered-Light Echoes from the Historical Galactic Supernovae Cassiopeia A and Tycho (SN 1572)
We report the discovery of an extensive system of scattered light echo arclets associated with the recent supernovae in the local neighbourhood of the Milky Way: Tycho (SN 1572) and Cassiopeia A.Expand
The Cassiopeia A Supernova Was of Type IIb
The spectrum shows that Cassiopeia A was a type IIb supernova and originated from the collapse of the helium core of a red supergiant that had lost most of its hydrogen envelope before exploding. Expand
Spectral synthesis in three-dimensional space for the earliest spectra of Type Ia supernovae (SNe Ia) is presented. In particular, the high-velocity absorption features that are commonly seen at theExpand
Analysis of the Flux and Polarization Spectra of the Type Ia Supernova SN 2001el: Exploring the Geometry of the High-Velocity Ejecta
SN 2001el is the first normal Type Ia supernova to show a strong, intrinsic polarization signal. In addition, during the epochs prior to maximum light, the Ca II IR triplet absorption is seenExpand