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- The Milky Way | ||
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- Quasar Spectra | ||
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Research QuestionLook at the spectra of a number of quasars at different redshifts. How do the spectra change as redshift increases? Make a graph of quasar color as a function of redshift. How do you explain what you see in the graph? Things you might think about
Tools that might help you (all links open in new windows)Explore: use this tool to get data, including spectra, when you know a quasar's ID number or position Search Form: use this tool to search for data on many quasars. See the user's guide to learn how to use the tool. Image List: use this tool to get thumbnail images of quasars that meet your search criteria Plate Browser: use this tool to browse through 640 spectra at a time, looking for quasars Science background (new windows)SDSS press release about distant quasars Hints and cautions (new windows)If you write your own SQL query, be sure to include spectral classes 3 and 4. Be careful that you correctly identify lines in the spectra – some lines are very close to other lines.
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