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Phase Light Curves for Extrasolar Jupiters and Saturns

Phase Light Curves for Extrasolar Jupiters and Saturns. U. Dyudina(1), P.Sackett(1), D. Bayliss(1), L Dones(2), H. Throop (2), C. Porco( 3 ), S. Seager( 4 ) (1)Mount Stromlo Obs., Australian National University

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Phase Light Curves for Extrasolar Jupiters and Saturns

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  1. Phase Light Curves for Extrasolar Jupiters and Saturns U. Dyudina(1), P.Sackett(1), D. Bayliss(1), L Dones(2), H. Throop (2), C. Porco(3), S. Seager(4)(1)Mount Stromlo Obs., Australian National University (2)Southwest Research Institute, Boulder, USA(3)Space Science Institute, Boulder, USA(4)DTM, Carnegie Institute at Washington, USA ASA meeting, July 6, 2004 astro-ph/0406390

  2. Sackett, Dyudina, et al. astro-ph/0406390 Method. Can we detect: • Model reflected light from extrasolar planets (as if they were Jupiter or Saturn) • Rings? (yes!) • Inclination? (often yes) • Clouds? (sometimes)

  3. Sackett, Dyudina, et al. astro-ph/0406390 Phase light curve of the orbiting planet

  4. Sackett, Dyudina, et al. astro-ph/0406390 Jupiter versus Saturn (orbit seen edge-on ) Full-disk albedo (Lp/L*)X (Planet radius)²/(Orbital distance) ² For Saturn at 1 AU : 1.6 X 10-7 Azimuth of the planet along the orbit (deg.)

  5. Sackett, Dyudina, et al. astro-ph/0406390 Saturn as seen by Cassini spacecraft Surface scattering properties measured by Pioneer and Voyager spacecraft

  6. Sackett, Dyudina, et al. astro-ph/0406390 Modeled phase light curves (edge-on) Full-disk albedo (Lp/L*)X (Planet radius)²/(Orbital distance) ²

  7. Sackett, Dyudina, et al. astro-ph/0406390 Modeled phase light curves (incl. 45 o) Full-disk albedo (Lp/L*)X (Planet radius)²/(Orbital distance) ²

  8. Sackett, Dyudina, et al. astro-ph/0406390 Modeled phase light curves (face-on) Full-disk albedo (Lp/L*)X (Planet radius)²/(Orbital distance) ²

  9. Sackett, Dyudina, et al. astro-ph/0406390 Light curves. Planet with rings at different geometries. -ring’s tilt to eclipticωr-observer’s azimuthi -orbital inclination 

  10. Sackett, Dyudina, et al. astro-ph/0406390 Eccentric orbits. No rings Inclination: i=0° (face on)

  11. Sackett, Dyudina, et al. astro-ph/0406390 Inclination: i=10°

  12. Sackett, Dyudina, et al. astro-ph/0406390 Inclination: i=45°

  13. Sackett, Dyudina, et al. astro-ph/0406390 Inclination: i~90° (edge on)

  14. Sackett, Dyudina, et al. astro-ph/0406390 Orientation of the orbital plane - Argument of Pericentre To observer Argument of pericentre: ω=0°

  15. Sackett, Dyudina, et al. astro-ph/0406390 To observer Argument of pericentre: ω=-90°

  16. Sackett, Dyudina, et al. astro-ph/0406390 To observer Argument of pericentre: ω=90°

  17. Sackett, Dyudina, et al. astro-ph/0406390 Example - HD 108147b • Extra solar planet discovered by Pepe, Mayor, et al (2002, A&A , 388, 632). • Properties: • Semi-major axis = 0.104 AU • Period = 10.9 days • Eccentricity = 0.498 • Argument of pericentre = -41° • Inclination = ?

  18. Sackett, Dyudina, et al. astro-ph/0406390 Light curve for HD 108147b with Jupiter’s surface pericentre pericentre

  19. Sackett, Dyudina, et al. astro-ph/0406390 Light curve for HD 108147b viewed at different azimuth t-shift contrast pericentre pericentre

  20. Sackett, Dyudina, et al. astro-ph/0406390 Contrastfor e=0.6 Scale at 1 AU (x10-7) 90 100 10 1 0.1 Inclination (i) 0 90 0 -90 Argument of pericentre (ω)

  21. Sackett, Dyudina, et al. astro-ph/0406390 Observable contrast for ringless planets at different geometries

  22. Sackett, Dyudina, et al. astro-ph/0406390 Light curve for HD 108147b viewed at different azimuth t-shift contrast pericentre pericentre

  23. Sackett, Dyudina, et al. astro-ph/0406390 Observable t-shiftfor ringless planets at different geometries

  24. Sackett, Dyudina, et al. astro-ph/0406390 With light curves can we detect: Rings? (yes!)Inclination? (often yes)Clouds? (sometimes) : Use of our predictions for planning observations Planet’s luminocity for many geometriesEffects of Jupiter’s or Saturn’s clouds

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