Spectral Classification of Stars

1. Briefly describe these spectra.
   Panel 1:  
   
   Panel 2:  
   
   Panel 3:  
   
   Panel 4:  
   
   Panel 5:  
   
   Panel 6:  

2. Order of panels from strongest to weakest Balmer lines:  

3. What is the peak wavelength (_max) of the continuum emission in each panel?
   Panel 1:  
   
   Panel 2:  
   
   Panel 3:  
   
   Panel 4:  
   
   Panel 5:  
   
   Panel 6:  

4. Which panel has the hottest stars?

    

   Which panel has the coolest stars?

    

   Put all the panels in order of hottest to coolest stars.

    

5. Are your lists from step 4 and step 6 the same?

    

   In what order should the letters go if they are in order of temperature?

    

6. Which spectral class corresponds to the 'strong Balmer line' temperature?

    

7. What is the temperature at which the Balmer lines are the strongest?  
    
    
   What happens to the Balmer lines at higher temperature?  
    
   What happens to the Balmer lines at lower temperature?