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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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© 1995 The Regents of the University of California
for permission, email outreach@ssl.berkeley.edu