WHAT TO LOOK FOR

Take a look at the map. The various colored points and the green triangles represent stars that produce Extreme Ultraviolet Radiation. The short way to say "Extreme Ultraviolet" is "EUV." Check out this diagram of the Electromagnetic Spectrum to see where Extreme Ultraviolet Radiation lies on the Spectrum.

These stars usually fall into one of four categories of stars. Find out more about the different natures of these stars by taking a look at the Star Type Handout page. You will be identifying the stars on the map as one of the four types of stars: white dwarfs, cataclysmic variable, late-type stars or early-type stars. To do this, you can take a look at the spectra of the stars which, like a human fingerprint, can help identify what type of star it is. So, try it out. Click on one of the green triangles and see if you can figure out what type of star it is by comparing its Extreme Ultraviolet Spectrum to the 4 Spectra templates given at the bottom of the star map page.

Spectra-

Take a look at the spectra of some of the stars. These spectra show us information about the light coming from the stars. Notice the numbers on the x-axis (the line at the bottom that goes across the page, that is, the horizontal line). What numbers are these? What is the unit of measurement? Find the same units of measurement on the spectrum diagram and compare the numbers from the star spectra with these numbers. Where does the star spectra fit? What type of light is it showing you?


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Last Update: April 9,2001

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