What determines surface temperature of a star?

What determines surface temperature of a star?

The temperature of a star refers to its surface and that is what determines its color. The lowest temperature stars are red while the hottest stars are blue. Astronomers are able to measure the temperatures of the surfaces of stars by comparing their spectra to the spectrum of a black body.

Which of the following best reveals the surface temperature of a star?

A star’s color is critical in identifying the star, because it tells us the star’s surface temperature in the black body radiation scale.

What does a star’s color tell about the star?

A star’s color provides a direct measurement of its surface temperature; the hottest stars shine blue-white, while the coolest are dull orange or red. In turn, the temperature indicates how much energy a given area of the star’s surface radiates into space every second.

What relationship do you see between star color and temp?

There is no relationship of a star’s color and temperature. Red/Orange stars are the coolest and blue stars are the hottest; As stars grow hotter, their temperature changes from Red/Orange to Blue.

How are the sun’s luminosity and surface temperature related explain?

Also, if a star has the same radius as the sun but a higher surface temperature, the hotter star exceeds the sun in luminosity. The sun’s surface temperature is somewhere around 5800 Kelvin (9980o Fahrenheit). That’s 5800 degrees above absolute zero, the coldest temperature possible anywhere in the universe.

How does the color of a star relate to its temperature?

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.

How can you estimate the surface temperature of a star?

The temperature of a star can be estimated by studying its spectrum because temperature determines the types of absorption lines present. Astronomers can obtain the surface temperature of star from measurements of its brightness at different frequencies.Then the astronomer will use the plank curve to obtain the surface temperature.

What is star type has the hottest surface temperature?

The hottest stars are the blue stars. These start at temperatures of about 10,000 Kelvin, and the biggest, hottest blue supergiants can be more than 40,000 Kelvin. In fact, there’s so much energy coming off the surface of a blue star that many could actually be classified as ultraviolet stars,…

What can the temperature of a star tell us?

The star color index is a very popular method of estimating the surface temperature of stars. Some massive stars can be as hot as 50,000 kelvins on the surface, where small stars, the Sun for example, might only measure at the scale of 1000s of kelvins.

What is used to determine the temperature of a star?

The spectroscope is used to measure temperature of stars. The color also help to determine temperature. Stars are classified by their spectra (the elements that they absorb) and their temperature. There are seven main types of stars. In order of decreasing temperature, O, B, A, F, G, K, and M.