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A main sequence star of less than 8 solar masses ends its life as a?
A main sequence star of less than 8 solar masses ends its life as a white dwarf. The star goes through the red giant phase before expelling its outer layers to form a planetary nebula, leaving behind a hot, dense core that eventually cools down to become a white dwarf.
Why is there a lower mass limit of 0.08 solar-masses for main-sequence stars?
Below about 0.08 solar masses an object will not be able to ignite nuclear fusion. There may be small amounts of deuterium fusion, but it is not sustainable. Objects between 0.08 solar masses and about 13 Jupiter masses are called brown dwarfs.
Why is there an upper mass limit for main-sequence stars of about 100 solar masses?
The upper mass limit for main-sequence stars is around 100 solar masses because the intense radiation and stellar winds in massive stars lead to mass loss through stellar winds and prevent the star from accreting enough material to exceed this limit. Additionally, stars with masses above 100 solar masses would generate such strong radiation pressure that it would overcome the force of gravity, preventing the formation of stable stars with higher masses.
Size of main sequence star?
A main sequence star is NOT a TYPE of star but a period in a stars evolution. Therefore all stars from the hottest to the coolest are on the main sequence at some stage - with the exception of brown dwarfs which do not reach the main sequence.
Which main sequence stars on the hertzsprung-Russell h-r diagram are the least massive?
The least massive main sequence stars on the Hertzsprung-Russell (H-R) diagram are red dwarfs, which are classified as spectral types M. These stars have masses typically less than 0.6 solar masses and are located on the lower right portion of the H-R diagram. Red dwarfs are characterized by their low luminosity and temperature, and they are the most common type of star in the universe.
A main sequence star of less than 8 solar masses ends its life as a?
A main sequence star of less than 8 solar masses ends its life as a white dwarf. The star goes through the red giant phase before expelling its outer layers to form a planetary nebula, leaving behind a hot, dense core that eventually cools down to become a white dwarf.
What current stage of stellar evolution is Sirius?
Sirius consists of two stars.Sirius A is a main-sequence star with about two solar masses.Sirius B is a white dwarf with about one solar mass. During its main-sequence, it's estimated to have been around five solar masses.
Why is there a lower mass limit of 0.08 solar-masses for main-sequence stars?
Below about 0.08 solar masses an object will not be able to ignite nuclear fusion. There may be small amounts of deuterium fusion, but it is not sustainable. Objects between 0.08 solar masses and about 13 Jupiter masses are called brown dwarfs.
Which stars are 3 or less solar masses?
Stars with 3 or fewer solar masses are typically classified as low to intermediate-mass stars. This category includes main-sequence stars like our Sun (1 solar mass), as well as red dwarfs, which can be less than 0.08 solar masses. These stars generally end their life cycles as white dwarfs after going through stages of red giant expansion and shedding their outer layers. The majority of stars in the universe fall into this mass range, making them the most common type.
Why is there an upper mass limit for main-sequence stars of about 100 solar masses?
The upper mass limit for main-sequence stars is around 100 solar masses because the intense radiation and stellar winds in massive stars lead to mass loss through stellar winds and prevent the star from accreting enough material to exceed this limit. Additionally, stars with masses above 100 solar masses would generate such strong radiation pressure that it would overcome the force of gravity, preventing the formation of stable stars with higher masses.
Size of main sequence star?
A main sequence star is NOT a TYPE of star but a period in a stars evolution. Therefore all stars from the hottest to the coolest are on the main sequence at some stage - with the exception of brown dwarfs which do not reach the main sequence.
Which main sequence stars on the hertzsprung-Russell h-r diagram are the least massive?
The least massive main sequence stars on the Hertzsprung-Russell (H-R) diagram are red dwarfs, which are classified as spectral types M. These stars have masses typically less than 0.6 solar masses and are located on the lower right portion of the H-R diagram. Red dwarfs are characterized by their low luminosity and temperature, and they are the most common type of star in the universe.
Which main-sequence stars on the Hertzsprung-Russell H-R diagram are the least massive?
The least massive main-sequence stars on the Hertzsprung-Russell (H-R) diagram are the red dwarfs, which are located in the lower right section of the diagram. These stars have masses less than about 0.6 solar masses and are characterized by their low temperatures and dim luminosities. Red dwarfs are the most common type of star in the universe and can burn for billions of years due to their efficient fusion processes.
How is the evolution of a main-sequence star with less than 0.4 M fundamentally different from that of a main-sequence star with more than 0.4 M?
Main-sequence stars with mass less than 0.4M convert all of their mass into helium and then stop fusing. Their lifetimes last hundreds of billions of years, so none of these stars has yet left the main sequence. Core hydrogen fusion ceases when hydrogen in the core of a main-sequence star with more than 0.4M is gone, leaving a core of nearly pure helium surrounded by a shell where hydrogen fusion continues. Hydrogen shell fusion adds more helium to the star's core, which contracts and becomes hotter. The outer atmosphere expands considerably, and the star becomes a giant. Comments: I guess 0.4M means 0.4 solar masses. Usually the "M" has an extra little symbol next to it when it means this. Also I'm not sure that there's an exact number you can put on the division between these two types of star. I could argue with the details in the answer, but I have not got the time. Anyway the basic idea seems correct.
What properties do red main sequence stars share?
high masses low tempature
Is Sirius A a main sequence star?
Polaris - the current North star is a multiple star system., consisting of the main star and smaller companions. The main star Alpha Ursae Minoris is a bright star, a 6 solar mass supergiant and it is a main sequence star. Orbiting very close to this main star is a white dwarf of roughly 1.5 solar masses. This is not a main sequence star. Orbiting further out is the third companion, a 1.39 solar mass star. This is a main sequence star. There are also two more distant components (α UMi C and α UMi D) - Polaris is thought to be part of an open cluster - I do not know if these later two stars are main sequence or not.
If a star was 150 solar masses what would its lifetime be?
A star that was 150 solar masses would spend the main part of its life as a main sequence star before collapsing into a white dwarf. A stars mass determines the life expectancy as well as its probable cause of death.
