What Characteristic Of A Star Primarily Determines Its Location On The Main Sequence??
What characteristic of a star primarily determines its location on the main sequence? nuclear fusion. Why do higher mass stars live shorter lives on the main sequence than lower mass stars? Higher mass stars burn through their nuclear fuel faster.
What determines the location of a star on the main sequence quizlet?
Mass determines where on the main sequence a star lives and what the main sequence lifetime is for the star.
What is characteristic of a main sequence star?
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 3 properties are common in a main sequence star?
The observable properties of main sequence stars such as their surface temperature luminosity and radius are all dictated by the mass of the star. Thus the main sequence is a MASS sequence. Consider taking a star and increasing its mass by pouring a little extra hydrogen gas onto it. MUCH higher luminosity.
What makes a star a main sequence star quizlet?
Main sequence stars are stars that are fusing hydrogen atoms to form helium atoms in their cores. … Gas ejected from a low-mass star in the final stage of its life.
What causes a star to leave the main sequence?
When stars run out of hydrogen they begin to fuse helium in their cores. This is when they leave the main sequence. High-mass stars become red supergiants and then evolve to become blue supergiants. It’s fusing helium into carbon and oxygen.
What are 4 characteristics of a main sequence star?
- Brightness. Two characteristics define brightness: luminosity and magnitude. …
- Color. A star’s color depends on its surface temperature. …
- Surface Temperature. …
- Size. …
What is characteristic of a main sequence star quizlet?
What is characteristic of a main sequence star? The rate of nuclear energy generated in the hydrogen to helium fusing core equals the rate radiated from the surface. The birth of stars is a battle between gravity and radiation pressure.
What main factor determines the stages a star will follow after the main sequence?
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 factor is most important in determining a star’s position on the main sequence and its 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.
What characteristic of a star cluster is used to determine its age?
As a cluster ages the mass of the main-sequence turnoff stars decreases. By determining the mass of the main-sequence turnoff stars we get the age of the cluster. The cluster age equals the main-sequence lifetime of the turnoff stars.
What is the main sequence What basic property of a star determines where it lies on the main sequence?
What basic property of a star determines where it lies on the main sequence? A star’s mass will determine where it lies on the main sequence. The most massive stars are in the upper left end while the lowest mass stars are in the lower right end.
What determines how long a star stays on the main sequence?
What does the main sequence represent?
The great majority are aligned along a narrow sequence running from the upper left (hot highly luminous) to the lower right (cool less luminous). This band of points is called the main sequence. It represents a relationship between temperature and luminosity that is followed by most stars.
What does main sequence star mean in science?
: the group of stars that on a graph of spectrum versus luminosity forms a band comprising 90 percent of stellar types and that includes stars representative of the stages a normal star passes through during the majority of its lifetime.
Why is there a main sequence quizlet?
Main sequence is when a star is burning hydrogen in its core. The luminosity and temperature of a main-sequence star are set by its mass. … The most massive stars can burn out and explode in a supernova after only a few million years of fusion.
Which is the most common type of main sequence star quizlet?
Red dwarf stars are the most common kind of stars in the Universe. These are main sequence stars but they have such low mass that they’re much cooler than stars like our Sun.
What causes a star that is originally on the main sequence to leave the main sequence quizlet?
What causes a star to leave the main sequence? The fuel begins to be used up. Hydrogen is consumed – core contrasts and then collapses. Hydrogen fuses outside the core.
How do stars move along the main sequence?
Stars such as our Sun move off the main sequence and up the red giant branch (RGB) fusing hydrogen into helium in hydrogen shell burning. A very short helium flash sees the start of helium core fusion and the star moves along the horizontal branch (HB).
How do stars on the main sequence obtain their energy?
Main sequence stars provide their energy by fusing hydrogen atoms together to produce helium. The more massive a star is the more energy it requires to counteract its own gravity.
What type of stars are in the main sequence?
- Blue Stars. These types of stars are quite rare with spectral types of either O or B. …
- Yellow Dwarfs. Yellow dwarfs have a 10% prevalence with a spectral type G. …
- Orange Dwarfs. …
- Red Dwarfs. …
- Blue Giants. …
- Blue Supergiants. …
- Red Giants. …
- Red Supergiants.
What is an example of a main sequence star?
Main-sequence stars also called dwarf stars are stars that fuse hydrogen in their cores. … For example a blue O-type dwarf star is brighter than most red giants. Main-sequence stars belong to luminosity class V. There are also other objects called dwarfs known as white dwarfs.
What is the most important characteristic of a star?
The distance from the Sun and Earth to a specific star is also important as astronomers detail the star’s characteristics. Of these characteristics stellar mass is the most important characteristic.
What does Main Sequence mean quizlet?
Main sequence. a diagonal area on an H-R diagram that includes more than 90 percent of all stars. White dwarf. Stage in which a star has used up its helium and its outer layers escape into space leaving behind a hot dense core that contracts. Red giant.
What are the characteristics of an open cluster of stars quizlet?
What are the characteristics of an open cluster of stars? Rotation of the protostar helps generate the magnetic fields and bipolar flows. in clusters in the Galaxy’s spiral arms. Stars live too long to be observed from birth to death.
What does the luminosity of a main sequence star tell us?
The luminosity and temperature of a main-sequence star are set by its mass. More massive means brighter and hotter. A ten solar mass star has about ten times the sun’s supply of nuclear energy. Its luminosity is 3000 times that of the sun.
What three stages will our sun undergo after the main sequence phase?
The Sun is currently a main sequence star and will remain so for another 4-5 billion years. It will then expand and cool to become a red giant after which it will shrink and heat up again to become a white dwarf. The white dwarf star will run out of nuclear fuel and slowly cool down over many billions of years.
When a main sequence star depletes its core hydrogen supply what happens?
As a main sequence star depletes the supply of hydrogen in the core thermal equilibrium unbalances and the pressure in the starís core lessens. Thermal equilibrium unbalances because the fusion of four hydrogen atoms into one helium atom decreases the number of particles present in the starís core.
What is the next stage in a stars life after the main sequence phase quizlet?
After the main sequence the star moves expands to a red giant. In this stage the star relies on the second element of the periodic table helium. after the star has finished with the helium the star implodes into the white dwarf stage which relies on carbon. You just studied 18 terms!
What do we need to measure in order to determine a star’s luminosity?
What do we need to measure in order to determine a star’s luminosity? Apparent brightness and distance.
What basic property of a star determines its color and thus its spectral type?
The spectral type of a star uniquely determines its color. Redder main-sequence stars are fainter on average than bluer main-sequence stars. Based on this what basic property of a star determines its color (and thus its spectral type)? Temperature.
Most stars fall along this line. … Stars on the Main Sequence that are hotter than the Sun are also larger than the Sun. So hot blue stars are more luminous (and therefore appear higher in this diagram) for two reasons: they are hotter and hot objects are more luminous than cool objects but they are also larger.
Characteristics of Stars
Main Sequence Stars
Stars and Galaxies: The Hertzsprung-Russell Diagram
The Impact of Rotation and Starspots on Pre-Main Sequence Stellar Evolution