What is the color and temperature of AB star?
What is the color and temperature of AB star?
Star classification
| Class | Temperature | Apparent color |
|---|---|---|
| B | 10,000–30,000 K | blue white |
| A | 7,500–10,000 K | white |
| F | 6,000–7,500 K | white |
| G | 5,000–6,000 K | yellowish white |
Does color determine the temperature of a star?
The surface temperature of a star determines the color of light it emits. Blue stars are hotter than yellow stars, which are hotter than red stars. Remember that magnitudes decrease with increasing brightness, so if B – V is small, the star is bluer (and hotter) than if B – V is large.
What star color is the hottest?
Blue stars
White stars are hotter than red and yellow. Blue stars are the hottest stars of all.
What relationship does color and temperature with stars?
Quite simply, the colour of a star is a measure of its surface temperature. Cooler stars emit more of their light at longer wavelengths and so appear redder; hotter stars emit more of their light at shorter wavelengths and so appear bluer.
How is the color of a StAR related to its temperature?
More specifically, the color is directly related to the surface temperature of a star. In the lowest temperature range, stars appear in the red color family.
What are the colors of the hottest stars?
The hottest stars tend to appear blue or blue-white, whereas the coolest stars are red. A color index of a star is the difference in the magnitudes measured at any two wavelengths and is one way that astronomers measure and express the temperature of stars.
What is the color index of the Sun?
The B–V color indexes of stars range from −0.4 for the bluest stars, with temperatures of about 40,000 K, to +2.0 for the reddest stars, with temperatures of about 2000 K. The B–V index for the Sun is about +0.65. Note that, by convention, the B–V index is always the “bluer” minus the “redder” color.
How is the Sun classified as a class star?
The Sun is classified as G2. Conventional color descriptions are traditional in astronomy, and represent colors relative to the mean color of an A class star, which is considered to be white. The apparent color descriptions are what the observer would see if trying to describe the stars under a dark sky without aid to the eye, or with binoculars.