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Phase Light Curves for Extrasolar Jupiters and Saturns

Phase Light Curves for Extrasolar Jupiters and Saturns. U. Dyudina( 5/ 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(5/1), 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 (5)Caltech ApJ 618:973-986, Jan. 2005

  2. Dyudina, et al. ApJ 618:973-986 Jan. 2005 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. Dyudina, et al. ApJ 618:973-986 Jan. 2005 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.)

  4. Dyudina, et al. ApJ 618:973-986 Jan. 2005 Modeled phase light curves (incl. 45 o) Full-disk albedo (Lp/L*)X (Planet radius)²/(Orbital distance) ²

  5. Dyudina, et al. ApJ 618:973-986 Jan, 2005 Light curves for various geometries with and without rings.

  6. Dyudina, et al. ApJ 618:973-986 Jan. 2005 Eccentric orbits. No rings Inclination: i=0° (face on)

  7. Dyudina, et al. ApJ 618:973-986 Jan. 2005 Inclination: i=10°

  8. Dyudina, et al. ApJ 618:973-986 Jan. 2005 Inclination: i=45°

  9. Dyudina, et al. ApJ 618:973-986 Jan. 2005 Inclination: i~90° (edge on)

  10. Dyudina, et al. ApJ 618:973-986 Jan. 2005 Observer’s aziuth To observer Argument of pericentre: ω=0°

  11. Dyudina, et al. ApJ 618:973-986 Jan. 2005 To observer Argument of pericentre: ω=-90°

  12. Dyudina, et al. ApJ 618:973-986 Jan. 2005 To observer Argument of pericentre: ω=90°

  13. Dyudina, et al. ApJ 618:973-986 Jan. 2005 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 • Inclination = ?

  14. Dyudina, et al. ApJ 618:973-986 Jan. 2005 Light curve for HD 108147b with Jupiter’s surface pericentre pericentre

  15. Dyudina, et al. ApJ 618:973-986 Jan. 2005 Argument of pericentre = -41° Light curve for HD 108147b viewed at different azimuth t-shift contrast pericentre pericentre

  16. Dyudina, et al. ApJ 618:973-986 Jan. 2005 Observable contrast for ringless planets at different geometries

  17. Dyudina, et al. ApJ 618:973-986 Jan. 2005 Light curve for HD 108147b viewed at different azimuth t-shift contrast pericentre pericentre

  18. Dyudina, et al. ApJ 618:973-986 Jan. 2005 Observable t-shiftfor ringless planets at different geometries

  19. Dyudina, et al. ApJ 618:973-986 Jan. 2005 With light curves can we detect: Rings? (yes!)Inclination? (often yes on eccentric orbits)Clouds? (sometimes on eccentric orbits) : Use of our predictions for planning observations Planet’s luminosity for many geometriesEffects of Jupiter’s versus Saturn’s clouds

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