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If a star has a large luminosity and also a low surface temperature then it must have?
Wiki User
∙ 13y ago
..... something wrong with it.
Generally luminosity is related to temperature.
Wiki User
∙ 13y ago
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How do astronomers measure stellar luminosity?
The reference that astronomers use to compare the luminosity of other stars is the sun's luminosity. The luminosity is denoted in multiples of the sun's luminosity. For example, the luminosity of the star Sirius is 25 times the luminosity of the sun.
What is luminosity also known as?
brightness
What is the luminosity of the star Procyon?
Procyon's color is a yellowish white. It is moderately hot and the surface temperature is about 6500 Kelvin.
What is Surface temperature of Pegasus?
Pegasus is a Greek mythological winged horse and mythological things don't have temperatures. It's also a constellation which, again, has no surface temperature.
What two factors determine how bright a star looks from earth?
The two factors are temperature and luminosity based on the HR diagram. The stage of the star in its life cycle also plays a key part.
What if the star has a bigger surface area but a smaller temperature how would that affect the luminosity?
As temperature decreases, luminosity will also decrease As radius increases (and with it surface area, but radius is a much easier to work with if you're trying to compare stars so we usually say radius) luminosity will also increase. If both are happening at the same time, it is possible that the luminosity of the star will remain more or less constant. Often one change will dominate the other, such as when a star goes through the red giant phase when the increase in radius has a far greater effect than the drop in temperature, and the star becomes more luminous.
What do stars have that depends on their size?
luminosity and temperature depend on their size but also on their mass
How do size temperature and distance affect a star's magnitude or luminousity?
A star's real luminosity is proportional to the the square of its diameter, and more or less proportional to the fourth power of its absolute temperature. The star's apparent luminosity is proportional to its real luminosity. It is also inversely proportional to the square of the distance.
Why does luminosity of the star depend on both its radius and surface?
If the radius is larger, the surface will also be larger. As a functional dependency, you only need one - the radius, or the surface - whatever.
How is it possinle for whit dwarfs to have a lower luminosity than the sun even though the sun is much cooler than the white dwarf?
Luminosity will also depend on the surface area. The Sun has about 10,000 times the surface area of a typical white dwarf.
How do white dwarfs compare with super-giants in terms of temperature and luminosity?
The plural of dwarf is "dwarves". White dwarves are hotter than supergiants. White dwarves also have much less luminosity. This is related to their very small surface area. Since white dwarves no longer produce energy, they will cool down over time - but this takes quite a while.
How do astronomers measure stellar luminosity?
The reference that astronomers use to compare the luminosity of other stars is the sun's luminosity. The luminosity is denoted in multiples of the sun's luminosity. For example, the luminosity of the star Sirius is 25 times the luminosity of the sun.
What are the two variables that incorporated in the Hertzsprung Russell diagram?
Essentially it's 'brightness' on the vertical scale and colour on the horizontal scale. The brightness can be expressed as luminosity, compared with our suns luminosity, or as absolute magnitude. The colour can also be expressed in terms of temperature, the colour shows what the temperature is. The colour can be categorised in to groups or spectral classes.
How are stars classifieds?
Stars are classified by their color, temperatures, sizes, and brightness, it could also be by composition and radiation.Scientists classify stars by color, luminosity, and temperature.
What is luminosity also known as?
brightness
What is the color and surface temperature of azmidiske?
Also known as Xi Puppis, Azmidiske is a red star and its surface temperature is 8324.33° Fahrenheit.
Why would two stars have different sizes and tempertes but same luminosity?
The luminosity depends on what stage of its life cycle the star is in. Also, the apparent luminosity depends on the distance from earth.
