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physical object > natural object > celestial body > star > emission line star > supernova |
supernova comparison table |
Subject | has frequency | is an instance of | has location | has spectra | has absolute magnitude | is a kind of | has mass | has ejecta velocity | has definition |
---|---|---|---|---|---|---|---|---|---|
S Andromedae | supernova | or center of gravity | greater than 0.08 the sun's mass | A supernova seen in 1885 in the Andromeda galaxy. | |||||
type I supernova | less common than type II supernova | spiral and elliptical galaxies | nonhydrogen lines | Mv = -14 to -17 | supernova | lower than type II supernova | 10000 km s-1 | A supernova which may be produced by the thermonuclear detonation of a highly degenerate core produced by mass transfer from a companion star. | |
type II supernova | 0.01 to 0.05 per year (in our Galaxy) | young, massive stars near the edge of spiral arms | hydrogen lines | Mv = - 12 to - 13.5 | supernova | higher than type II supernova | 5000 km s-1 | A gigantic stellar explosion in which the star's luminosity suddenly increases by as much as a billion times. Most of the star's substance is blown off, leaving behind, at least in some cases, an extremely dense core which may be a neutron star. | |
type III supernova | or center of gravity | supernova | much higher than type II supernova | Supernova similar to Type II |
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