Measuring Io's Velocity Spectra: The Importance of Spectrometer Sensitivity

AI Thread Summary
To measure the velocity spectra of Io using a 0.7m focal length refractor telescope, the spectrometer must have high sensitivity to accurately capture emission lines. Key emission lines under consideration include Magnesium and Hydrogen bands, which are crucial for analysis. The discussion emphasizes the need for clarity on what is meant by "sensitivity," distinguishing it from resolution. Optimal conditions will enhance the spectrometer's ability to produce a usable spectrum for comparison. Understanding these parameters is essential for effective measurements of Io's velocity spectra.
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Can someone estimate how sensitive a spectrometer has to be in order to measure the velocity spectra of Io through a 0.7m focal length refractor telescope (radius 70mm) of during optimal conditions? :smile:
 
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Can someone estimate how sensitive a spectrometer has to be in order to measure the velocity spectra of Io through a 0.7m focal length refractor telescope (radius 70mm) of during optimal conditions?

What do you mean by sensitivity? Do you mean resolution? What absorption/emission line are you planning to observe to measure the velocity?
 
I was thinking of the Magnesium and Hydrogen emission bands...

By sensitivity I mean for the spectrometer to produce a spectra sufficient to compare the emission lines :smile:
 

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