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Any star that is plotted in that area is a main-sequence star.The Sun is a main-sequence star. A main sequence star starts it's life when the temperature of the core reaches 10 million degrees kelvin. A main-sequence star is a star lying on the main-sequence band of the H-R diagram, and an H-R diagram is a diagram that plots a star's luminosity vs. surface temperature. As shown in the Hertzsprung-Russell Diagram, Main Sequence stars span a wide range of luminosities and colors, and can be classified according to those characteristics. The star has now found a new energy source to hold itself up, although it won't last anywhere near as long as the hydrogen-burning main sequence. Eventually, the temperature of the stellar core gets so high, helium fusion can occur. The smallest stars, known as red dwarfs, may contain as little as 10% the mass of the Sun and emit only 0.01% as much energy, glowing feebly at temperatures between 3000-4000K. Calculations show that the temperature and density in the inner region slowly increase as helium accumulates in the center of a 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. Main sequence stars fuse hydrogen in their cores in order to maintain this balance. This increased surface area also increases the luminosity of the star. Main sequence stars are stars that are fusing hydrogen atoms to form helium atoms in their cores. Any star that is plotted within that area is a main-sequence star.The Sun is a main-sequence star. Main sequence stars fuse hydrogen in their cores in order to maintain this balance. The sun is a typical Main Sequence star. Main Sequence on the Hertzsprung-Russell Diagram About 90% of the known stars lie on the Main Sequence and have luminosities which approximately follow the mass-luminosity relationship.The Hertzsprung-Russell Diagram is a plot of luminosity vs temperature, except that the temperature is decreasing to the right on the horizontal axis.

Notice the trends in the table: as the temperature of the main sequence star increases, the mass and size increase. Brightness is a value of luminosity verses distance as viewed from a point. Below this mass the gravitational force inwards is insufficient to generate the temperature needed for core fusion of hydrogen and the "failed" star forms a brown dwarf instead. They have masses from 1.4 to 2.1 times the mass of the Sun and surface temperatures between 7600 and 10,000 K. Bright and nearby examples are Altair (A7 V), Sirius A … Thus, the main sequence is a MASS sequence. Stars constantly struggle to balance gravity and pressure throughout their lives. Question: Within The Main Sequence, What Is True About The Relationship Between The Luminosity Of Stars And The Temperature Of Stars?

It must be in Thermal Equilibrium (Energy Generation balances Luminosity) .

The Higher The Temperature, The Lower The Luminosity. Most stars (about 90%) are Main Sequence Stars. Start studying Science - Astronomy.

The star has now found a new energy source to hold itself up, although it won't last anywhere near as long as the hydrogen-burning main sequence.

Asymptotic giant branch stars

The main sequence is a region on a Hertzsprung-Russell Diagram where most stars appear. The main sequence is a region on a Hertzsprung-Russell Diagram where most stars appear. The star contracts and dims as it settles down on the helium-burning main sequence. Search. The amount of time a star is on the main sequence depends on its size and temperature. Stars constantly struggle to balance gravity and pressure throughout their lives. It must generate energy by "burning" Hydrogen into Helium in its core. There Is No Relationship The Higher The Temperature, The Higher The Luminosity.

Eventually, the temperature of the stellar core gets so high, helium fusion can occur. Surface temperature determines the brightness of main sequence stars. Volume must be taken into consideration as well. Main Sequence Stars A main sequence star is a protostar that has begun nuclear fusion. For a main sequence star with a chemical composition similar to the Sun, the relationship between radius and effective surface temperature (in Kelvin) can be modeled fairly easily. Main sequence stars are the central band of stars on the Hertzsprung-Russell Diagram. Calculations show that the temperature and density in the inner region slowly increase as helium accumulates in the center of a star. Once achieving nuclear …
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