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Unformatted text preview: if they observed the Sun's motion very carefully over a couple of decades. The stronger the gravity between the star and planet, the larger will be the wobble of the star and the easier to detect. Therefore, the astrometric technique is well-suited to finding massive jovian exoplanets close to their parent stars. No exoplanets have been found using this technique (at the time of writing). The now-canceled SIM Lite mission was to use this technique and the Gaia mission , scheduled to launch in 2013, will use this technique. Sequence on the right side is actually from two different vantage points. The wobbling star is what you would see if the orbit was face-on. The doppler shifting absorption lines is what you would see if the orbit was edge-on from a position to the right of the star-planet system (so the lines shift toward the red end when the star is moving away from the observer and the exoplanet is moving toward the observer)....
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This note was uploaded on 12/15/2011 for the course AST AST1002 taught by Professor Emilyhoward during the Fall '10 term at Broward College.
- Fall '10