HR Diagram Lab - Name HR Diagram Student Guide Background...

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Name: NAAP – HR Diagram Explorer 1/9 HR Diagram – Student Guide Background Information Work through the background sections on Spectral Classification, Luminosity, and the Hertzsprung-Russell Diagram. Then complete the following questions related to the background information. Question 1: The table below summarizes the relationship between spectral type, temperature, and color for stars. Note that the surface temperature of the stars in the table increases. Question 2: Complete the following table related to stellar luminosities in solar units using the equation 2 4 L R T v . Star Surface Temperature K Spectral Type Color Betelguese M2 Arcturus 4,300 G2 Yellow Procyon A F5 Yellow-White Sirius A A1 White Rigel A 11,000 Delta Orionis O9 Radius (R ) Temperature (T ) Luminosity (L ) 1 1 1 2 1 9 1 1/2
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NAAP – HR Diagram Explorer 2/9 Question 3: The mass luminosity relation 3.5 L M v describes the mathematical relationship between luminosity and mass for main sequence stars. It describes how a star with a mass of 2 M would have a luminosity of _____________ L while a star with luminosity of 3,160 L would have an approximate mass of ________________ M ⊙. HR Diagram Explorer Open the HR Diagram Explorer . Begin by familiarizing yourself with the capabilities of the Hertzsprung-Russell Diagram Explorer through experimentation. x An actual HR Diagram is provided in the upper right panel with an active location indicated by a red x. This active location can be dragged around the diagram. The options panel allows you to control the variables plotted on the x-axis: (temperature, B- V, or spectral type) and those plotted on the y-axis (luminosity or absolute magnitude). One can also show the main sequence, luminosity classes, isoradius lines, or the instability strip. The Plotted Stars panel allows you to add various groups of stars to the diagram.
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  • Fall '15
  • Stellar classification, HR Diagram Explorer, Conceptual HR Diagram

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