In The Evolution Of Massive Stars What Is The Significance Of The Temperature 600 Million K??
In the evolution of massive stars what is the significance of the temperature 600 million K? It is the temperature needed for carbon fusing into heavier elements. … Just as a low-mass main sequence star runs out of fuel in its core it actually becomes brighter.
Which of the following best describes the evolutionary track of the most massive stars in the HR diagram?
Which of the following best describes the evolutionary track followed on the H-R diagram for the most massive stars? about the same mass and a million times higher density. … A high-mass star dies more violently than a low-mass star because: it generates more heat and its core eventually collapses very suddenly.
Which characteristic of a star is most important for determining how it will evolve?
The primary factor determining how a star evolves is its mass as it reaches the main sequence. The following is a brief outline tracing the evolution of a low-mass and a high-mass star.
What is the key factor that determines the temperature density radius and luminosity?
| Question | Answer |
|---|---|
| What is the key factor that determines the temperature density radius luminosity and pace of evolution for a prestellar object? | mass |
| The most abundant substance in a molecular cloud is | H2. |
| Protostars are located on the H–R diagram | above and to the right of the main sequence. |
What is the main property of a star that determines what its fate will be as it evolves?
Stellar Evolution
The fundamental property of stars which determines where a star will fall along the main sequence its lifetime rate of evolution and ultimate fate — whether explosive or quiet is a star’s mass.
What is the significance of a star having greater than 8 solar masses with respect to stellar evolution?
Stars born larger than 8 solar masses usually retain enough mass to undergo core collapse with the resulting shock wave producing a Type Ib supernova (spectra without Hydrogen or Silicon lines with Helium lines) a Type Ic supernova (without Hydrogen or Helium or Silicon lines) or a Type II supernova (with Hydrogen …
Where are the most massive stars to be found in the main sequence of a Hertzsprung Russell diagram?
Where are the most massive stars to be found in the main sequence of a Hertzsprung-Russel diagram? The upper left end.
What is the significance of stellar formation and evolution?
The study of the formation and evolution of stars is a key research field for all major questions in astrophysics and cosmology from the study of the planets in the Universe as a whole through the evolution of our Sun and galaxies.
Why is mass the most important factor in how a star evolves?
A star’s life cycle is determined by its mass. The larger its mass the shorter its life cycle. A star’s mass is determined by the amount of matter that is available in its nebula the giant cloud of gas and dust from which it was born.
What is the single most important quantity in determining the evolution of a star?
Two quantities mass and age are probably most fundamental. The progress of a star’s life is predestined by its mass because ultimately the mass determines how much energy the star can produce and how quickly it will do so. The age of a star tells you how far along it is in its evolution.
What factor is most important in determining a star’s position on the main sequence?
Mass is the key factor in determining the lifespan of a main sequence star its size and its luminosity. Stars on the main sequence also appear to be unchanging for long periods of time.
What determines the temperature in the core of a star?
The Main Sequence
For most of a star’s life nuclear fusion in the core produces helium from hydrogen. A star in this stage is a main sequence star. This term comes from the Hertzsprung-Russell diagram shown here. For stars on the main sequence temperature is directly related to brightness.
What brilliant phenomenon is associated with the death of a massive star?
The brilliant point of light is the explosion of a star that has reached the end of its life otherwise known as a supernova. Supernovae can briefly outshine entire galaxies and radiate more energy than our sun will in its entire lifetime.
What is the most basic property of a star that determines its location on the main sequence its temperature and luminosity?
What is the most basic property of a star that determines its location on the main sequence its temperature and luminosity )?
What is the most important factor of a star that determines is final fate?
The total mass of a star is the main factor that determines its evolution and eventual fate. For most of its active life a star shines due to thermonuclear fusion of hydrogen into helium in its core releasing energy that traverses the star’s interior and then radiates into outer space.
Why are massive stars important?
However despite their relative low number massive stars have a fundamental influence over the interstellar medium and galactic evolution because they are the responsible of the ionization of the surrounding gas and they deposit mechanical energy first via strong stellar winds and later as supernovae enriching the …
What is the evolution of a massive star?
What happens to the largest mass stars?
The largest mass stars may become black holes
The highest mass star has a core that shrinks to a point. On the way to total collapse it may momentarily create a neutron star and the resulting supernova rebound explosion.
What is the importance of HR diagram in astronomy?
HR diagrams are valuable because they reveal important information about the stars plotted on them. After constructing an HR diagram for a group of stars an astronomer can make estimates of many important stellar properties including diameter mass age and evolutionary state.
How do large mass stars in the upper region of the main sequence produce energy?
Why are about 90% of the stars we observe on the main sequence?
Being on the main sequence means that the star is converting hydrogen to helium in the core. Since stars are made mostly of hydrogen this process takes approximately 90% of a star’s life. Thus it makes sense that the 90% of the stars observed at some particular time would be undergoing this process.
What happens to the core temperature of a star as it ages evolves?
What happens to the core temperature of a star as it ages?
As a star ages the fuel in the core gets used up and the star cools. The core will then contract due to gravity. As a result the temperature inside the core can increase and trigger more fusion.
What happen during star formation and evolution?
What comes from giant or massive stars?
Super-giant come from giant or massive stars. They grow to as much as three times the mass of our sun as they lose the nuclear fuel at their core.
How do massive stars make the elements necessary for life?
How do high-mass stars make the elements necessary for life? In its final stages of life a high-mass star’s core becomes hot enough to fuse carbon and other heavy elements.
Why do massive stars have shorter life spans than average stars?
A star’s life expectancy depends on its mass. Generally the more massive the star the faster it burns up its fuel supply and the shorter its life. … A star with a mass like the Sun on the other hand can continue fusing hydrogen for about 10 billion years.
What is the most important quantity on which the lifetime of a star depends?
The overall lifespan of a star is determined by its mass. Since stars spend roughly 90% of their lives burning hydrogen into helium on the main sequence (MS) their ‘main sequence lifetime’ is also determined by their mass.
In which stage do massive stars explode and release large amount of energy?
supernova
A supernova (/ˌsuːpərˈnoʊvə/ plural: supernovae /ˌsuːpərˈnoʊviː/ or supernovas abbreviations: SN and SNe) is a powerful and luminous stellar explosion. This transient astronomical event occurs during the last evolutionary stages of a massive star or when a white dwarf is triggered into runaway nuclear fusion.
What is the significance of the Colour of a star?
The color of a star mostly indicates a star’s temperature and it can also suggest the star’s age. Class O stars which are blue in color are the hottest and class M stars which are red in color are the coldest. This can be tricky to remember as we typically think of blue as a cool color and red as a hot one.
What factor is most important in determining stars position on the main sequence and subsequent evolution?
What factor is most important in determining a star’s position on the main sequence and subsequent evolution? Mass. What is a planetary nebula? The ejected envelope of a giant star surrounding the remains of a star.
What factor is most important in determining a star’s position on the main sequence and subsequent evolution group of answer choices?
The primary factor determining how a star evolves is its mass as it reaches the main sequence. The following is a brief outline tracing the evolution of a low-mass and a high-mass star. Stars are born out of the gravitational collapse of cool dense molecular clouds.
Why do stars leave the main sequence?
Eventually a main sequence star burns through the hydrogen in its core reaching the end of its life cycle. At this point it leaves the main sequence. … Then the pressure of fusion provides an outward thrust that expands the star several times larger than its original size forming a red giant.
Evolution of Solar Mass Stars
Nebulae around evolved massive stars
Evolution of High Mass Stars
Why Stars Supernova–Death of Massive Stars