What process occurs in stellar explosion?
Stellar nucleosynthesis is the creation (nucleosynthesis) of chemical elements by nuclear fusion reactions within stars. The term supernova nucleosynthesis is used to describe the creation of elements during the explosion of a massive star or white dwarf.
What is the difference between the two types of supernovae?
A type I supernova occurs in closed binary systems where two average stars orbit around each other quite closely. A type II supernova occurs in larger stars of around 10 solar masses. After it leaves the main sequence it starts fusing increasingly heavy elements in shells around the core.
What are the observational differences between Type I and Type II supernovae quizlet?
What is the main observational difference between a Type I and a Type II supernova? Hydrogen lines are prominent in the spectrum of a Type II supernova but absent in that of Type I. Approximately how many days after a Type II supernova explosion is the luminosity about 10 million times that of the Sun?
What are the two types of supernova?
There are two main types of supernovae, the Type I and the Type II. I know this sounds a little counter intuitive, but let’s start with the Type II first. These are the supernovae produced when massive stars die. We’ve done a whole show about that process, so if you want to watch it now, you can click here.
What is the difference between supernova and supernovae?
These supernovae occur at the end of a massive star’s lifetime, when its nuclear fuel is exhausted and it is no longer supported by the release of nuclear energy. If the star’s iron core is massive enough, it will collapse and become a supernova.
What causes a Type 1 supernova?
A star can go supernova in one of two ways: Type I supernova: star accumulates matter from a nearby neighbor until a runaway nuclear reaction ignites. Type II supernova: star runs out of nuclear fuel and collapses under its own gravity.
What are Type 1 supernovae used for quizlet?
One of the best ways: Type Ia supernovae, which can be used to measure distance up to 3,000 Mpc. Type Ia Supernovae are exploding white dwarfs. They probably occur in close binary stars with mass transfer from a normal star to a white dwarf. As mass transfer continues, the mass of the white dwarf increases.
Why are Type 1a supernovae all the same luminosity?
Type Ia supernovae happen when a white dwarf, the “corpse” of a star similar to the Sun, absorbs material from a twin star until it reaches a critical mass—1.4 times that of the Sun—and explodes. Because of their origin, all these explosions share a very similar luminosity.