What causes Type Ia supernova?

Type Ia supernovae (SNIa) are thought to be the result of the explosion of a carbon-oxygen white dwarf in a binary system as it goes over the Chandrasehkar limit, either due to accretion from a donor or mergers.

What is the difference between Type Ia and Type II 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 remnant does a supernova type Ia leave?

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. They have a strong ionized silicon emission line at 615 nm.

How often do supernovae happen?

about once every 50 years
On average, a supernova will occur about once every 50 years in a galaxy the size of the Milky Way. Put another way, a star explodes every second or so somewhere in the universe, and some of those aren’t too far from Earth.

What are supernovae used for?

Supernovae add enriching elements to space clouds of dust and gas, further interstellar diversity, and produce a shock wave that compresses clouds of gas to aid new star formation.

How could supernovae type Ia be used as standard 4 candles?

Since type Ia supernovae have a known brightness they can be used as standard candles to determine the distance to a galaxy once the stretch-factor is accounted for. Using the light curves, determine the apparent magnitude of the supernova at its peak brightness and then find the distance to the galaxy.

What is the difference between Type 1 and Type 2 supernovae quizlet?

Type I supernovae have larger stars as their progenitors. Type I supernovae occur only in binary or other multiple-star systems, whereas Type II supernovae occur in isolated single, high-mass stars.

How do we tell the difference between a white dwarf supernova type Ia and a massive star type II supernova?

For Type II supernovae, mass flows into the core by the continued formation of iron from nuclear fusion. Once the core has gained so much mass that it cannot withstand its own weight, the core implodes. For a Type Ia supernova, the energy comes from the runaway fusion of carbon and oxygen in the core of a white dwarf.