AST101H1 Lecture Notes - Exoplanet, Doppler Spectroscopy, Methods Of Detecting Exoplanets
15 Mar 2014
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AST101H1 Full Course Notes
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Review session - december 10, 2-4 oise g162. Twice the length of the midterms but we have four times as much time - 3 hours. The doppler method works on the idea that when a planet is orbiting a star, it drags the star around a little circle - they orbit their common center of mass. We cannot actually see the planet, but rather notice changes in the star"s spectral lines. This means that the star is being dragged toward and away from us as it orbits the common center of mass. When the star is moving away from us, the star"s spectral lines will be redshifted. A star is orbited by an exoplanet. When the planet is moving away from us, the star"s spectral lines will appear blue-shifted. Can be represented on a radial velocity curve (radial velocity is motion towards or away from us) Imagine two exoplanets orbiting the same star.
