What is the difference between Type 1 and Type 2 supernova?
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 the 2 types of supernovae?
There are two basic types of supernova, called (boringly enough) “Type I” and “Type II”.
- Type I: supernovae WITHOUT hydrogen absorption lines in their spectrum.
- Type II: supernovae WITH hydrogen absorption lines in their spectrum.
How are supernovae classified?
Supernovae are classified based on the presence or absence of certain features in their optical spectra taken near maximum light. We now know that Type II, Type Ib and Type Ic supernovae result from the core-collapse of massive stars, while Type Ia supernovae are the thermonuclear explosions of white dwarfs.
What is a Type 1 star?
Type I are a little rarer, and are created when you have a very strange binary star situation. One star in the pair is a white dwarf, the long dead remnant of a main sequence star like our sun. The companion can be any other type of star, like a red giant, main sequence star, or even another white dwarf.
What is left after a type 2 supernova?
Unlike SNIa where nothing remains after the explosion, SNII tend to form supernova remnants of ejected stellar material which surround either a neutron star or pulsar (if the core mass is less than about 3 solar masses), or a black hole.
What is left behind after a Type 1 supernova?
Supernova remnant, nebula left behind after a supernova, a spectacular explosion in which a star ejects most of its mass in a violently expanding cloud of debris. The stars became bright enough to be visible in the daytime.
What does a Type 1 supernova leave behind?
Type I (especially Ia) supernova create most of the iron and nickel found in the interstellar medium. Type Ia supernovae are several times more luminous than Type Ib, Ic, and Type II supernovae, leave no core remnant behind, and result from when a low-mass star’s core remnant (a white dwarf) detonates.
What triggers a Type 2 supernova?
A Type II supernova (plural: supernovae or supernovas) results from the rapid collapse and violent explosion of a massive star. A star must have at least 8 times, but no more than 40 to 50 times, the mass of the Sun ( M ☉) to undergo this type of explosion.
How fast does a supernova collapse?
70,000 meters per second
Does a supernova turn into a black hole?
When the cores collapse to form dense stellar objects called neutron stars, they blast off the outer layers of the star in a supernova. When the core collapses, the blast wave slams into the dense material above, which thwarts the explosion. Instead of creating a supernova, the star implodes, forming a black hole.
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 is the most common type of supernova?
Type II-plateau
Can a supernova destroy a galaxy?
At their brightest, supernovae can outshine an entire galaxy.
What happens when a star goes supernova?
This causes the pressure to drop. Gravity wins out, and the star suddenly collapses. Imagine something one million times the mass of Earth collapsing in 15 seconds! The collapse happens so quickly that it creates enormous shock waves that cause the outer part of the star to explode!”
How does a supernova completely destroy a star?
The outer layers are blown off into space in a giant explosion, spreading fertile dust clouds through-out the universe . But because of the momentum transfer, the star’s core survives. The collapsing event has so intensely squeezed the star’s core, that it transforms into something exotic.
Are supernovas dying stars?
What causes a supernova? One type of supernova is caused by the “last hurrah” of a dying massive star. This happens when a star at least five times the mass of our sun goes out with a fantastic bang! Massive stars burn huge amounts of nuclear fuel at their cores, or centers.
What will happen if a star dies?
When the helium fuel runs out, the core will expand and cool. The upper layers will expand and eject material that will collect around the dying star to form a planetary nebula. Finally, the core will cool into a white dwarf and then eventually into a black dwarf. This entire process will take a few billion years.