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L06 - ReviewL02L05 1....

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1/27/12 1 Review L02 – L05 1. Beginning of the Modern Astronomy ‐ Aristotle, Ptolemy, Copernicus, Kepler, Newton 2. Exoplanets (examples & general properMes) ‐ mass, eccentricity, distance from host stars, number of members & layout 3. DetecMon Methods of Exoplanets ‐ direct imaging with AO ‐ radial velocity method (Doppler Effect, ProperMes of light (RadiaMon & Line formaMon)) Why Ptolemy’s Epicycle Model was a good theory? Why Ptolemy’s Epicycle Model was not a good theory? In what aspect, Kepler’s Model is superior than Ptolemy’s Model? Then, why Newton’s Law of MoMons is even greater than Kepler’s laws? Kepler’s 3 rd law (law of harmonics) P 2 = R 3 where P in years R in AU (Earth‐Sun distance) Newtonian form where M = Mass of the Sun It starts from F = ma Newton’s 2 nd law of moMon
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1/27/12 2 Let’s put it all together. The general properMes of the exoplanetary systems. 1. Mass 2. Orbital Shape (i.e. Eccentricity) 3. Distance from Host Star 4. Number of members & Layout DetecMon Methods Earth Atmosphere distorts the light pa^erns from sources. AO off AO on Direct Imaging Radial Velocity RadiaMon & Spectral Lines Exoplanets : DetecMon Method
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1/27/12 3 Exoplanet DetecMon Methods Indirect Methods ‐ Radial Velocity (Doppler Shia) ‐ Astrometric Measurement
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  • Spring '07
  • Dr.HaywoodSmith,Jr
  • Astronomy, Johannes Kepler, Kepler Mission, 3.DetecMonMethodsofExoplanets directimagingwithAO radialvelocitymethod, Let'sputitalltogether. ThegeneralproperMesofthe exoplanetarysystems, Sharpincreasein brightness Changesinthe, SmallAngleFormula sinA=a/c tanA=a/b

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