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Different Types Of Supernovas Essay

1052 words - 4 pages

Have you ever wondered what a supernova is? Or even if the word t is a real? Well I’ll be talking about what a supernova is, what it does, and how it is made.
The word supernova is plural for supernovae or supernovas. The definition of a supernova is any violently exploding stars after eruption suddenly increases many millions of times its normal level. The supernova came around the 1930’s by Walter Baade and Fritz Zwicky. Supernovas are very rare to see they happen every 50 years in the Milky Way. Supernovas cannot be predicted in our galaxies it is impossible.(“Supernova”)
A supernova is an explosion of a massive supergiant star. It may shine with a brightness of 10 billion suns! The total energy output may be 10^44 joules, as much as the total output of the sun during its 10 billion year lifetime. The likely scenario is fusion proceeds to build up a core of iron. The “iron group” of elements around mass number A=60 are the most tightly bound nuclei, so no more energy can be gotten from nuclear fusion. Supernovas are classified at Type one if their light curves exhibit sharp maxima and then die away gradually. The maxima may be about 10 billion solar luminosities. Type two supernovas have less sharp peaks at maxima and peak at about 1 billion solar luminosities. They die away more sharply than Type one. Type two supernovas are not observed to occur in elliptical galaxies, and are thought to occur in population one type stars in the spiral arms of galaxies. Type one supernovas occur typically occur in elliptical galaxies, so they are probably Population type two stars. With the observation of a number of supernovas in other galaxies a more refined classification of supernovas has been developed based on the observed spectra. They are classified as Type one if they have no hydrogen lines in their spectra. The subclass type la refers to those which have a strong silicon at 615nm. They are classified as IB if they strong helium lines, and IC if they do not. Type two supernovas have strongly hydrogen lines. These spectral have special features.(“supernovae”)
Current models we have of supernovas are The type codes described above that astronomers give to supernovae are taxonomic in nature: the type number describes the light observed from the supernova, not necessarily its cause. For example, type Ia supernovae are produced by runaway fusion ignited on degenerate white dwarf progenitors while the spectrally similar type Ib/c are produced from massive Wolf-Rayet progenitors by core collapse. The following summarizes what astronomers currently believe are the most plausible explanations for supernovae. (“Supernova”)
Supernovas are classified as type one if their light curves exhibit sharp maxima and then die away smoothly and gradually. The model for the initiation of type one supernova is the detonation of the white dwarf when it collapses under the pressure of electron degeneracy. It is assumed that the white dwarf accretes enough mass to...

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