How does a main sequence star become a supergiant?
Supergiants develop when massive main-sequence stars run out of hydrogen in their cores, at which point they start to expand, just like lower-mass stars. Unlike lower-mass stars, however, they begin to fuse helium in the core smoothly and not long after exhausting their hydrogen.
Is a super giant a main sequence star?
Supergiant stars form out of massive main-sequence stars that have run out of hydrogen in their cores. This causes them to expand greatly, similarly to low-mass stars, however, they begin to fuse helium in their core not long after exhausting their hydrogen supplies.
What is the life cycle of very super giant stars?
Depending on its size, the star becomes either an average star or a massive star. The average star then becomes a red giant, a planetary nebula, and ends its life as a white dwarf. The massive star turns into a red supergiant, goes supernova, and ends up as a neutron star or a black hole – again, depending on its size.
What makes a giant or supergiant different than a main sequence star?
A giant star is a star with substantially larger radius and luminosity than a main-sequence (or dwarf) star of the same surface temperature. They lie above the main sequence (luminosity class V in the Yerkes spectral classification) on the Hertzsprung–Russell diagram and correspond to luminosity classes II and III.
How does main sequence stars become giants quizlet?
The star is a stable main sequence star. energy, and the star expands to become a giant. The core continues to collapse and heat until it reaches 100 million K and helium fusion begins. 5) When the hydrogen and helium fuel is exhausted, the star collapses into an Earth-sized body of great density – a white dwarf.
What are giants and supergiants?
Large Surface Areas That is why they are called giants and supergiants: they are much larger stars than the corresponding main sequence stars. For example, a giant star like Arcturus is almost twenty times larger than the Sun, and the supergiant star Antares is more than 300 times larger than the Sun.
How are giants and supergiants formed?
As the star burns through its hydrogen, it begins to fuse helium in the core (a fast process called the Helium Flash) and shells of hydrogen outside of the core. At this point, the star inflates and becomes a giant or supergiant depending on size.
What is the difference between a giant star and a supergiant star?
What is the difference between a giant star and a supergiant star? Giant stars have radii between 10 and 100 solar radii and luminosities between 10 and 1,000 times that of the Sun. Whereas Supergiants have radii between 30 and 1,000 solar radii and luminosities between 30,000 and 100,000 times that of the Sun.
Why can’t the lowest mass main sequence stars become giants?
Why can’t the lowest-mass stars become giants? They are not massive enough to fuse helium.
How did the lives of most massive stars and what are the two possible products of this event?
A massive star terminates in a brilliant explosion called a supernova. The two possible products of a supernova event are a neutron star or a black hole.
What is the main star sequence?
A main sequence star is any star that has a hot, dense core which fuses hydrogen into helium to produce energy. Most stars in the galaxy are main sequence stars, including Alpha Centauri A, Tau Ceti and the Sun. Stars are formed by the gravitational collapse of gas and dust from the interstellar medium.
Which is a possible sequence in the lifecycle of a massive star?
The stages of a stars life cycle are main sequence, red giant and white dwarf.
Which is a possible sequence in the life cycle of a massive star?
How much mass does a star need to become a red giant?
To become a red giant, a particular star must have between half our sun’s mass, and eight times our times our sun’s mass. Astronomers call such stars low- or intermediate-mass stars. So you can see that our sun is one of the stars that will inevitably, someday, become a red giant.
What will happen if a low massive main sequence star?
It is now known as a main sequence star. When a main sequence star begins to run out of hydrogen fuel, the star becomes a red giant or a red supergiant. After a low- or medium-mass star has become a red giant, the outer parts grow bigger and drift into space, forming a cloud of gas called a planetary nebula.
Which kinds of main sequence stars produce supernova?
Main Sequence Stars These are the massive type O stars that die as Supernovas and Hypernovas. They are tens of times the mass of our sun and are becoming more rare.