What are the differences between the processes responsible for Type I and Type II supernovae?
Type I supernovae occur only in binary or other multiple-star systems
, whereas Type II supernovae occur in isolated single, high-mass stars.
What process is responsible for type Ia supernovae?
Double degenerate progenitors
A second possible mechanism for triggering a Type Ia supernova is
the merger of two white dwarfs whose combined mass exceeds the Chandrasekhar limit
. The resulting merger is called a super-Chandrasekhar mass white dwarf.
What are the differences between Type 2 and Type 1a supernova?
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?
How do the two types of supernovae differ Type Ia and Type II?
Type Ia supernovae are produced by white dwarf stars in a binary star system that have exceeded their Chandrasekhar limit when the companion star dumps a lot of material onto them. Type II supernovae are produced by
massive stars whose cores collapse following the exhaustion of their fusion processes
.
What is left after a type 2 supernova?
Type II supernovae usually leave behind one of three objects:
A neutron star
.
A pulsar
(this is just a spinning neutron star, really) A black hole.
What causes a Type 1 supernova to detonate?
What causes a Type I supernova to detonate? … In a core-collapse supernova,
the outer part of the core rebounds from the inner, high-density core
, destroying the entire outer part of the star.
What are the 2 types of supernovae?
There are two main types of supernovae,
the Type I and the Type II
.
How and why a Type II supernova occurs?
Type II. 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.
Which luminosity class will explode as a supernova?
At very low metallicity, stars of around 140–250 M
☉
will reach core collapse by pair instability while they still have a hydrogen atmosphere and an oxygen core and the result will be a supernova with
type II
characteristics but a very large mass of ejected
56
Ni and high luminosity.
How do Type II supernovae occur quizlet?
A Type II supernova occurs
when a high-mass star’s core becomes dominated by iron, halting the nuclear fusion process
. The star’s core can no longer maintain equilibrium, and the core begins to contract. … The neutrinos are able to escape the star, carrying off energy, causing further contraction of the core.
What causes a nova to occur quizlet?
What is a nova and what causes it? It is
a sudden flare up in a star system
. This occurs when a white dwarf is part of a binary system. The less massive star reaches the red giant stage, reaches its inner Roche limit, and begins to transfer mass to the WD, forming an accretion disk around it.
What are Type 1 supernovae used for quizlet?
Type Ia Supernovae are “Standard Candles”: Type Ia
provide a way to measure the distances to galaxies
. Type Ia supernovae all have nearly the same light curves and reach nearly the same brightness because white dwarfs that explode are all nearly the same.
What is the most powerful type of supernova?
He and his colleagues found the supernova, called
SN2016aps
, using the Panoramic Survey Telescope and Rapid Response System in Hawaii. Not only is SN2016aps the most powerful supernova ever spotted, it is the longest one we have found.
Which type of supernova is more common?
The most common kind of supernova is
a Type II-plateau
, so called because the luminosity stays nearly the same for months. The spectrum is dominated by the Balmer lines of hydrogen.
How are the 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.
