Table of Contents
What are type Ia and Type II supernovae?
Type I and Type II Supernovae. Supernovae are classified as Type I if their light curves exhibit sharp maxima and then die away gradually. The maxima may be about 10 billion solar luminosities. Type II supernovae have less sharp peaks at maxima and peak at about 1 billion solar luminosities.
What is the difference between a Type Ia supernovae and a Type II supernovae?
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 is a type 1ax supernova?
A Type Ia supernova (read: “type one-A”) is a type of supernova that occurs in binary systems (two stars orbiting one another) in which one of the stars is a white dwarf. The other star can be anything from a giant star to an even smaller white dwarf.
What is the difference in the causes of type Ia and Type II supernovae?
Physically, type II supernovae are caused by the collapse of a massive star. Type Ia supernovae are driven by a white dwarf which accretes enough mass to exceed the Chandrasekhar limit and collapses into a neutron star.
What is the difference between Type Ia and Type II supernovae quizlet?
What is the difference between Type Ia and Type II supernovae? Physically, type II supernovae are caused by the collapse of a massive star. Type Ia supernovae are driven by a white dwarf which accretes enough mass to exceed the Chandrasekhar limit and collapses into a neutron star.
What is a Type 1 supernova called?
Type Ia are also known as thermonuclear supernovae. This type of explosion does not take place when the core of a massive star collapses. They instead occur in a binary (or double) star system. To trigger a type Ia supernova, one of the two stars must be a white dwarf.
What is the main observational difference between a Type I and a Type II supernova quizlet?
What are the observational differences between Type I and Type II supernovae? A type 1 Supernova has a light curve similar to that of a nova and they are hydrogen poor. A type 2 Supernova has a light curve with a plateau and they are hydrogen rich.
How are type Ia supernovae formed?
One involves surveying the sky for a special type of exploding star, called a type Ia supernova. Many supernovae occur when massive stars run out of fuel, rapidly collapse under their own weight, and then explode because of strong shock waves that propel out of their interiors.
What is a Type 1a supernova and how does it occur?
When a runaway thermonuclear explosion rips through a white dwarf star and blows the star to bits, it’s called a type 1a supernova. These explosions are incredibly violent and incredibly bright, sometimes outshining entire galaxies.
How are Type Ia supernova formed?
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.
Which characteristics belong to type Ia supernovae and which belong to Type II supernovae?
Progenitor of the supernova:
- Type Ia: a white dwarf in a close binary system (the white dwarf might be very old — up to 10 billion years)
- Type II: a massive supergiant star (the supergiant must be very young — as young as 1 million years)
How are Type Ia supernovae formed?
What is the difference between spectra Type 1 and Type 2 supernovae quizlet?
How are type Ia supernova formed?
What causes a 1a supernova?
What does a Type 1a supernova leave behind?
Type I supernovae: Type I supernovae typically don’t leave anything behind at all: all of the star’s matter, including its iron core, is blasted into space.
What produces a Type 1 supernova?
(3) A Type Ia supernova is caused by the transfer of matter onto a white dwarf by a close companion star. If a white dwarf is in a close binary system with a main sequence star, the main sequence star, as it expands into a giant or supergiant, will start to dump gas onto the white dwarf.
What is the difference between Type Ia and type II supernovae quizlet?
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.
What is the main observational difference between a Type Ia and a Type II supernova 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.
What are the different types of Type I supernovae?
We distinguish three sub-types of Type I supernovae: Type Ia, Type Ib, and Type Ic. The spectra of a Type Ia supernova contain a distinct silicon absorption line around 6150 Å(vertical orangeline as seen in the figure); this line is unique among Type I supernovae and so defines the subgroup-a of the Type I supernovae.
What is an Iax supernova?
It has been proposed that a group of sub-luminous supernovae that occur when helium accretes onto a white dwarf should be classified as Type Iax. This type of supernova may not always completely destroy the white dwarf progenitor, but instead leave behind a zombie star. Supernova remnant N103B taken by the Hubble Space Telescope.
What is the significance of Type Ia supernovae in determining distances?
Type Ia supernovae are incredibly powerful tools for determining distances in our universe. Because these supernovae are formed by white dwarfs that explode when they reach a uniform accreted mass, the supernova peak luminosity is thought to be very consistent. This consistency allows these supernovae to be used as standard…
Is the only game in town for Type 1a supernovae?
But as with everything we’re learning about type 1a supernovae, those single-degenerate systems are not the only game in town. Now, many astronomers think those systems produce a minority of type 1a supernovae and that most of the explosions we see come from a different deadly combination.