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

@article{Krause2008TychoB1,
title={Tycho Brahe’s 1572 supernova as a standard type Ia as revealed by its light-echo spectrum},
author={Oliver Krause and Masaomi Tanaka and Tomonori Usuda and Takashi Hattori and Miwa Goto and Stephan M. Birkmann and Ken’ichi Nomoto},
journal={Nature},
year={2008},
volume={456},
pages={617-619}
}
• Published 28 October 2008
• Physics
• Nature
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…
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