- Tycho G
name=Tycho G Starbox image
caption=Tycho G ("g") as seen by Hubble. "
NASAimage". Starbox observe
ra=RA|00|25|19.9 [http://hubblesite.org/pubinfo/pdf/2004/34/pdf.pdf] The progenitor of Tycho Brahe’s 1572 supernova]
appmag_v=17 Starbox character
variable= Starbox astrometry
absmag_v= Starbox detail
metal=about 100% Sun
radius= 2 [±1]
temperature=5750 Starbox catalog
names= Starbox reference
Tycho G is the surviving binary companion star of the
SN 1572 supernovaevent.
The star is located about 7500
light-years away in the constellation Cassiopeia. It is a subgiant, similar to our Sun in luminosity and color but more evolved.
Tycho G is still close to the center of the supernova remnant and had triggered once the explosion of its binary companion
white dwarfstar by contributing mass to it.
Evidence for Companion Thesis
* Tycho G' is traveling at a rate of 136 km/s, which is more than four times faster than the mean velocity of other stars in its stellar neighbourhood.
* Tycho G's metallicity is about 3 times higher than the mean metallicity of other stars in its stellar neighbourhood.
Origin of the Name
SN 1572is often called "Tycho's supernova", named after Tycho Brahewho observed the "new star" in 1573.
The postfix "G" originates from the candidate companion stars considered, labelled Tycho A to Tycho V.
List of supernova remnants
* [http://www.mpa-garching.mpg.de/mpa/research/current_research/hl2005-3/hl2005-3-en-print.html Discovery of the binary companion of Tycho Brahe's supernova]
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