Light-echo spectrum reveals the type of tycho Brahe's 1572 supernova

T. Usuda, O. Krause, M. Tanaka, T. Hattori, M. Goto, S. M. Birkmann, K. Nomoto

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Citation (Scopus)


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.

Original languageEnglish
Title of host publicationBinary Paths to Type Ia Supernovae Explosions
PublisherCambridge University Press
Number of pages2
ISBN (Print)9781107019812
Publication statusPublished - 2011 Jul

Publication series

NameProceedings of the International Astronomical Union
ISSN (Print)1743-9213
ISSN (Electronic)1743-9221


  • Supernovae: individual (SN 1572, Tycho's supernova)


Dive into the research topics of 'Light-echo spectrum reveals the type of tycho Brahe's 1572 supernova'. Together they form a unique fingerprint.

Cite this