Star spectra and star color relation

In summary, the spectrum of a star is mainly determined by its surface temperature, with individual emission and absorption lines having a secondary effect on its color. The intensity of blue and purple light is higher for hot stars due to their high temperature, while cool stars have a skew towards infrared light. Therefore, the star's spectrum has a greater impact on its color than individual emission and absorption lines.
  • #1
nmsurobert
288
36
I'm reading about star spectra, color, and temperature and have a question...

I understand that very hot stars burn blue because a lot of the radiation is on the UV end so it appears more blue when its ran through several color filters. and the opposite applies for cool stars that are skewed towards IR. but does the stars spectra have anything to do with its color or does color mostly come from temperature?

thanks!
 
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  • #2
The spectrum of a star is primarily a function of the temperature of its surface, with individual emission and absorption lines being secondary and only barely contributing to its color. Unfiltered light from a very hot star appears bluish because the intensity of the visible light at the blue and purple end of the spectrum is higher than that of the orange and red end, which is the result of its very high surface temperature.
 
  • #3
The word spectra is the plural form of spectrum, which is commonly defined as 'The spectrum is the range of different colors which is produced when light passes through a glass prism or through a drop of water.' So it is safe to conclude the terms temperature and color are ambiguous in science.
 
  • #4
Drakkith said:
The spectrum of a star is primarily a function of the temperature of its surface, with individual emission and absorption lines being secondary and only barely contributing to its color. Unfiltered light from a very hot star appears bluish because the intensity of the visible light at the blue and purple end of the spectrum is higher than that of the orange and red end, which is the result of its very high surface temperature.
Ah ok. Awesome. Thanks!
 

1. What is a star spectrum?

A star spectrum is a unique pattern of light emitted by a star that contains information about its temperature, chemical composition, and other physical characteristics.

2. How are star spectra related to star color?

Star spectra and star color are closely related, as the color of a star is determined by the wavelengths of light it emits. The temperature of a star, which is reflected in its spectrum, affects the colors we see from Earth.

3. What does the color of a star tell us about its properties?

The color of a star can provide information about its temperature, age, size, and chemical composition. Cooler stars appear red, while hotter stars appear blue. The colors can also reveal the presence of certain elements in a star's atmosphere.

4. Can we determine the chemical composition of a star from its spectrum?

Yes, scientists can analyze the absorption lines in a star's spectrum to determine the elements present in its atmosphere. Each element produces a unique set of absorption lines, allowing us to identify the chemical composition of a star.

5. How do scientists use star spectra to study the universe?

By analyzing the spectra of stars, scientists can gain insight into the formation and evolution of galaxies, the structure of the universe, and the overall composition of matter in the universe. They can also use the spectra to identify and study other celestial objects, such as planets, comets, and nebulae.

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