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Where does most of the mass of red giant go when the star becomes a white dwarf?
When a red giant evolves into a white dwarf, most of its mass is lost during the outer envelope's expulsion, which occurs in the form of stellar winds and planetary nebulae. The core, which remains, is primarily composed of carbon and oxygen and is what ultimately forms the white dwarf. This process significantly reduces the star's mass, with only the dense core remaining as the white dwarf.
What is the sequence of a stars life?
A star starts as a blue giant, then becomes a yellow dwarf. It will then swell into a red giant. Then, at the end of it's life, it becomes a super giant and explodes. The remains are usually a red dwarf, which brightens and becomes a white dwarf. The white dwarf fades and becomes a black dwarf which turns to dust. Sometimes after a supernova it turns into a pulsar, which rotates 300-1,000 times a minute and makes giant rhythmic pulses that stretch for light years.
How does the surface temperature of a white dwarfs compareto a white main sequence star?
No, white dwarfs are cooler than supergiants, they also have a lower luminosity (are more faint). A different viewpoint: There's obviously a range of temperatures for these stars, but the hottest (surface temperature) known star is in fact a white dwarf. It has a surface temperature of over 200,000 degrees Celsius.
How do the lives of the most massive stars end?
Less massive stars end up as white dwarfs. More massive stars end up as a supernova or a neutron star or for the really massive stars...as a black hole. As a star ends its time in the main sequence it either becomes a Red Giant and end its life as a White Dwarf or becomes a White Super Giant and ends its life in an explosion (supernova) and if it's really dense it becomes a neutron star or a black hole as mentioned above.
What is the stage after red giant for a low or medium mass star?
White dwarf is the most common answer if you are thinking of the red giant as the entire time a star swells to more than its main sequence size.However, the stages of a star actually occur in this order.After a medium mass star reaches red giant phase (second brightest phase), its core contracts until it becomes so dense helium begins to fuse into carbon (helium flash) at which point the star enters its second burning phase, known as the horizontal branch (slightly less bright than red giant).This is the second longest phase of the star (if not considering dwarf phases which are not really stars, they are more like cooling coals after a fire).Hydrogen to Helium reactions still occur in layers surrounding the core. When the star's store of Helium is consumed, it begins what is called the asymptotic giant branch (brightest/largest phase) where it again swells in size before pushing its otter layers off to form a planetary nebula.Eventually this nebula floats away leaving the cooling carbon core known as a white dwarf which will eventually cool to a black dwarf over billions of years. (This is not to be confused with a brown dwarf which is a slightly less than a stars sized object that never will never have the temperature to fuse hydrogen.There are currently none or very few black dwarfs present because the universe is not yet old enough for white dwarfs to have cooled.This is the simplest correct answer I could give. If you are in first years of highschool or below you might want to write it all down because the likely hood of you teacher actually knowing the right answer is slim. More than likely they will assume a star moves straight from a red giant to white dwarf.Unfortunately you can get answers marked wrong because of their stupidity.
Where does most of the mass of red giant go when the star becomes a white dwarf?
When a red giant evolves into a white dwarf, most of its mass is lost during the outer envelope's expulsion, which occurs in the form of stellar winds and planetary nebulae. The core, which remains, is primarily composed of carbon and oxygen and is what ultimately forms the white dwarf. This process significantly reduces the star's mass, with only the dense core remaining as the white dwarf.
What is the sequence of a stars life?
A star starts as a blue giant, then becomes a yellow dwarf. It will then swell into a red giant. Then, at the end of it's life, it becomes a super giant and explodes. The remains are usually a red dwarf, which brightens and becomes a white dwarf. The white dwarf fades and becomes a black dwarf which turns to dust. Sometimes after a supernova it turns into a pulsar, which rotates 300-1,000 times a minute and makes giant rhythmic pulses that stretch for light years.
How can a star having 5 times the suns mass end as a white dwarf?
It is true that a white dwarf above about 1.4 solar masses cannot exist. When a star dies, most of the mass does not become part of the remnant. A star 5 times the mass of the sun will shed most of its mass during the red giant phase. Only the innermost portion will collapse to form a white dwarf.
How does a small or dwarf star form?
A dwarf star could form in different ways depending on what kind. Red dwarfs and brown dwarfs are formed when nebula compresses into a giant burning ball of gas, just like most stars do; white dwarfs are formed after a star became a red giant and blown off its outer layers, the remaining core became a white dwarf; black dwarfs are formed after white dwarfs cooled down and stopped emitting visible light.
How does the surface temperature of a white dwarfs compareto a white main sequence star?
No, white dwarfs are cooler than supergiants, they also have a lower luminosity (are more faint). A different viewpoint: There's obviously a range of temperatures for these stars, but the hottest (surface temperature) known star is in fact a white dwarf. It has a surface temperature of over 200,000 degrees Celsius.
Describe in general the life history of a star with an average mass like the Sun?
A star, the size of our sun, does not explode into a supernova. Instead, toward the end of its life, it grows over 1000 times its size into what is called a Red Giant. After that it implodes and looses mass at a quick rate reaching the white dwarf stage. After that it is a black dwarf and looses all its energy and mass.
What will the sun most likely end as?
The sun will likely end its life as a white dwarf star, after passing through the red giant phase. It will shed its outer layers, leaving behind a dense core that will slowly cool over billions of years.
How does a star turn into a white dwarf star?
A white dwarf is what stars like the Sun become after they have exhausted their nuclear fuel. Near the end of its nuclear burning stage, this type of star expels most of its outer material, creating a planetary nebula. Only the hot core of the star remains. This core becomes a very hot white dwarf, with a temperature exceeding 100,000 kelvin.
How do the lives of the most massive stars end?
Less massive stars end up as white dwarfs. More massive stars end up as a supernova or a neutron star or for the really massive stars...as a black hole. As a star ends its time in the main sequence it either becomes a Red Giant and end its life as a White Dwarf or becomes a White Super Giant and ends its life in an explosion (supernova) and if it's really dense it becomes a neutron star or a black hole as mentioned above.
Do star grow bigger as they come older?
Most stars (including our own sun) as they grow older, eventually cool, expanding into a red-giant. After a period of time as a red-giant, they shrink to a hugely dense but very small white dwarf.
Is bellatrix a dwarf or giant?
Bellatrix is a giant. In general most stars with "names" (as opposed to designations) are NOT dwarfs, with a few notable exceptions such as Proxima.
What is the stage after red giant for a low or medium mass star?
White dwarf is the most common answer if you are thinking of the red giant as the entire time a star swells to more than its main sequence size.However, the stages of a star actually occur in this order.After a medium mass star reaches red giant phase (second brightest phase), its core contracts until it becomes so dense helium begins to fuse into carbon (helium flash) at which point the star enters its second burning phase, known as the horizontal branch (slightly less bright than red giant).This is the second longest phase of the star (if not considering dwarf phases which are not really stars, they are more like cooling coals after a fire).Hydrogen to Helium reactions still occur in layers surrounding the core. When the star's store of Helium is consumed, it begins what is called the asymptotic giant branch (brightest/largest phase) where it again swells in size before pushing its otter layers off to form a planetary nebula.Eventually this nebula floats away leaving the cooling carbon core known as a white dwarf which will eventually cool to a black dwarf over billions of years. (This is not to be confused with a brown dwarf which is a slightly less than a stars sized object that never will never have the temperature to fuse hydrogen.There are currently none or very few black dwarfs present because the universe is not yet old enough for white dwarfs to have cooled.This is the simplest correct answer I could give. If you are in first years of highschool or below you might want to write it all down because the likely hood of you teacher actually knowing the right answer is slim. More than likely they will assume a star moves straight from a red giant to white dwarf.Unfortunately you can get answers marked wrong because of their stupidity.
