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The Epic Search for Extra-Solar Planets

The Epic Search for Extra-Solar Planets. Stephen Henry, Trevecca Nazarene University Advisors: Greg Henry, Tennessee State University Sam Stuekle, Trevecca Nazarene University . 51 Peg b Per = 4.23 d K = 56 m/s e = 0.01 Msini = 0.45 M JUP Dist = 0.05 AU.

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The Epic Search for Extra-Solar Planets

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  1. The Epic Search for Extra-Solar Planets Stephen Henry, Trevecca Nazarene University Advisors: Greg Henry, Tennessee State University Sam Stuekle, Trevecca Nazarene University

  2. 51 Peg b Per = 4.23 d K = 56 m/s e = 0.01 Msini = 0.45 MJUP Dist = 0.05 AU

  3. Detection of Planetary Reflex Motion x Stephen Henry

  4. Mass histogram of the known extrasolar planets showing a steep rise to smaller masses. Planets less than 1 MJUP suffer from incompleteness. Nonetheless, there may be many more Neptune-mass and perhaps 10 Earth-mass planets than the jupiters and saturns observed so far. This suggests formation via the standard model (bottom up) rather than via disk instabilities (top down) for most planets. (Marcy et al. 2003, PASPC, 294)

  5. Keck Telescope Mauna Kea, Hawaii T4 APT Fairborn Observatory, Arizona VS. Size: 10 meter Cost: $100,000,000 Availability: ~7 nights / year Size: 0.75 meters Cost: $100,000 Availability: 365 x 7 nights / year

  6. What is a transit?

  7. Porb = 3.52474 days MP = 0.69 MJUP Orbital Radius = 0.046 AU R* = 1.12 RSUN RP = 1.35 RJUP Mean Density = 0.35 g/cc

  8. Hot Neptunes 0.1 Jupiter Mass D. A. Fischer 2003, in The Future of Small Telescopes in the New Millennium, Vol. III, T. D. Oswalt (ed.), Kluwer Academic Publishers

  9. Compute Phase Curve Fit Transit Template

  10. Compute Phase Curve JD(i) – Epoch Period Phase (i) = Epoch

  11. Compute Phase Curve JD(i) – Epoch Period Phase (i) = Epoch

  12. The Reduced c2 Statistic Residuals 3s + - N = the number of data points

  13. Fit Transit Template Save best fit c2 Fit Phase Curve

  14. Save best fit c2 Fit Phase Curve

  15. Tsearch output searching APT data for simulated transits of a giant planet with R = 1.35 RJup across a star with R = 1.0 RSun. The resulting transits are 0.0211 mag deep and are detected in 100% of our simulations.

  16. Tsearch output searching APT data for simulated transits of a giant planet with R = 0.50 RJup across a star with R = 1.0 RSun. The resulting transits are only 0.0029 mag deep but are still detected in 80% of our simulations.

  17. Tsearch output for the star HD 144359, a comparison star on T4. Our software found 0.004 mag grazing eclipses with a period of 4.384 days and ellipsoidal variations with a similar amplitude. This event is several times smaller than candidate events found in other surveys.

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