What is the meaning of supernova nucleosynthesis?
Supernova nucleosynthesis is the nucleosynthesis of chemical elements in supernova explosions.
What is a Type II supernova 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 gravitational compression generates heat, which initiates photodisintegration.
Which star will end in a Type II supernova?
The type that we’re going to be looking at is today is Type II supernova. These occur when a neutron star or a black hole is left behind after the death of the star ie., after the supernova occurs.
What produces a type 2 supernova 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 supernova explosion?
A supernova is the colossal explosion of a star. Scientists have identified several types of supernova. One type, called a “core-collapse” supernova, occurs in the last stage in the life of massive stars that are at least eight times larger than our Sun. As these stars burn the fuel in their cores, they produce heat.
What is caused by type II supernovae quizlet?
A type II supernova does not involve a white dwarf but instead requires a massive star to reach the end of its ability to generate energy in its core. This results in a collapse of the core and an explosion into a type II supernova.
Why are Type II supernovae only seen in areas with active star formation?
Like Type Ib and Type Ic supernovae, SNII are only found in regions of star formation, indicating that they result from the core-collapse of massive stars.
What is a Type 2 supernova quizlet?
What is Type 2 supernova quizlet?
Type II Supernova. a stellar explosion produced at the endpoint of the evolution of stars whose mass exceeds roughly 10 times the mass of the Sun.
What are the elements formed in supernova nucleosynthesis?
The elements formed in these stages range from oxygen through to iron. During a supernova, the star releases very large amounts of energy as well as neutrons, which allows elements heavier than iron, such as uranium and gold, to be produced. In the supernova explosion, all of these elements are expelled out into space.
What are the two types of supernovae?
Supernovae may be divided into two broad classes, Type I and Type II, according to the way in which they detonate. Type I supernovae may be up to three times brighter than Type II; they also differ from Type II supernovae in that their spectra contain no hydrogen lines and they expand about twice as rapidly.
How many types of nucleosynthesis are?
two
In astronomy – and astrophysics and cosmology – there are two main kinds of nucleosynthesis, Big Bang nucleosynthesis (BBN), and stellar nucleosynthesis.
Which characteristics belong to Type Ia supernovae and which belong to Type II supernovae?
Which characteristics belong to Type Ia supernovae and which belong to Type II supernovae?
- 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)
What is the difference between a Type I and II supernova 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.
Which elements are produced only in supernova explosions?
This shock wave compresses the material it passes through and is the only place where many elements such as zinc, silver, tin, gold, mercury, lead and uranium are produced.
What is a type II supernova signal?
Type II supernovae are associated with the core collapse of a massive star together with a shock-driven expansion of a luminous shell which leaves behind a rapidly rotating neutron star or, if the core has mass of >2–3 solar masses, a black hole. The typical signal from such an explosion is broadband and peaked at around 1 kHz.
What is an SnII supernovae?
Like Type Ib and Type Ic supernovae, SNII are only found in regions of star formation, indicating that they result from the core-collapse of massive stars. The key difference between the three types of core-collapse supernovae is whether they have retained their outer envelopes of hydrogen and helium gas prior to the explosion.
What is supernova nucleosynthesis?
Supernova nucleosynthesis is the nucleosynthesis of chemical elements in supernova explosions.
What are the different types of supernovae?
Type II supernova 1 Formation. The onion-like layers of a massive, evolved star just before core collapse. 2 Core collapse. 3 Theoretical models. 4 Light curves for Type II-L and Type II-P supernovae. 5 Type IIn supernovae. 6 Type IIb supernovae. 7 See also 8 References. 9 External links.