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New HOU Unit on Discovering Exoplanets

New HOU Unit on Discovering Exoplanets. Workshop. For NASA’s Kepler mission EPO. A guy who’s thought a lot about planets. Existing material. First draft by Patrick Campbell in summer 2005 Revised in fall 2005 and again at HOU conference summer 2006 Look at revised document. AAVSO data.

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New HOU Unit on Discovering Exoplanets

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  1. New HOU Unit on Discovering Exoplanets Workshop For NASA’s Kepler mission EPO A guy who’s thought a lot about planets

  2. Existing material First draft by Patrick Campbell in summer 2005 Revised in fall 2005 and again at HOU conference summer 2006 Look at revised document

  3. AAVSO data ACCESS DATA http://www.aavso.org/data/ http://www.aavso.org/data/download/ Examples: AB ANDCX AQR Make light curve(s)

  4. Outline I. Discussion—Light Curve Interpretation II. Eclipsing Binary Stars III. Transiting Planets Plotting a Light Curve Transit Depth Period Duration of transit Duration of ingress and duration egress Finding the planet radius from the transit depth V. Finding radius of orbit of the planet VI. Is the planet in the habitable zone of the star?

  5. Proposed interactive simulation I. Present starfield. "Click on a star to look for transits”Box appears around star selected (includes nearby stars), zooms 2x and zoomed box moves to upper right (or left ) corner. II. "Choose method of getting data" - 3 options available Time-series of camera images 1. "Use the 'Measure Brightness" tool to click on your star. Tool automatically records brightness of the star and advances to next image in the time series. 2. Click on each brightness data entry to have it plotted on light curve graph. a. Use "Time Ruler" to measure period of transits, if any. b. Use "% Dimming Ruler" to measure drop in brightness (depth of transit).

  6. Proposed interactive simulation • B. Plot Data • Displays brightness data and offers step A2 (skips A1). • C. Show Light Curve • Just shows light curve graph and offers tools in A2a and A2b. • Allows horizontal stretch- zoom along x-axis (time) of graph. • III. How hot is it? • Calculates how far planet is from its star (orbit radius) based on measured period from IIA2a. • Determine spectral type of star and star temperature. • Calculate temperature based on orbit radius and star temperature. • Compare temperature to Mars-Earth-Venus-Mercury temperatures.

  7. Proposed interactive simulation • IV. How big is it? • Calculates radius of planet based on measured depth of transit from IIA2b. • Determine possibilities for type of atmosphere (in gross terms, not composition) • V. Could it be habitable? Construct a planet. • Using answers in III and IV, tell if planet could be habitable. • Choose from graphic images of artist renditions for appropriate types of planets. • Zoom from planet-wide view to surface view.

  8. What should the Unit really be?

  9. Ideas?

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