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Debris Disk

Debris Disk. Detecting Debris Disks Using Adaptive Optics. Nasim Naderseresht UC Berkeley. Outline. Formation of the star Formation of planets Formation of the debris disk The importance of studying debris disks Debris disk Experiment – Sensitivity Limit. The Formation of a Star.

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Debris Disk

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  1. Debris Disk Detecting Debris Disks Using Adaptive Optics Nasim Naderseresht UC Berkeley

  2. Outline • Formation of the star • Formation of planets • Formation of the debris disk • The importance of studying debris disks • Debris disk Experiment – Sensitivity Limit

  3. The Formation of a Star

  4. Debris Disks Edge-on Face-on

  5. Anatomy of Face-on Debris Disk

  6. Experiment • Finding Sensitivity Limit for the planet/debris disk • Probability of sighting a planet/debris disk • Make an artificial planet/debris disk • Inserting the planet/disk to data • Change the brightness of the planet/disk

  7. HD191849 Image captured by Paul Kales with Keck telescope in Hawaii 2004

  8. b = x

  9. b = 2x

  10. b = 4x

  11. b = 5x

  12. b = 10x

  13. b = 15x

  14. b = 20x

  15. Change in Brightness (b) Planet b = x b = 2x b = 4x b = 10x b = 15x b = 20x

  16. b = x

  17. b = 2x

  18. b = 8x

  19. b = 10x

  20. b = 20x

  21. b = 30x

  22. b = 40x

  23. Finding the Probability b = 8x b = 10x b = 12x b = 14x b = 16x b = 18x

  24. Level of Brightness on Noise vs. Black regions

  25. Debris disk inserted to the data k = x k = brightness

  26. k = 2x

  27. k = 3x

  28. k = 4x

  29. k = 5x

  30. k = 6x

  31. k = x k = 2x k = 3x k = 4x k = 6x k = 5x

  32. Conclusion • fdd = (1/x)fstar • fstar = 1.89 e08 DN/sec • fdd= k ∫ r(-a) dr = k* r(-a)/(1-a) │ [rmin(1-a) - rmax(1-a)]*(k/1-a) • fdd=32600 ± 19600 DN/sec • 1/x=1.72 e-4 ± 1.04 e-4 rmax rmax rmin rmin

  33. Acknowledgements James Graham, Advisor Michael Fitzgerald, Supervisor Lisa Hunter, Associate Director, Education and Human Resources Malika Moutawakkil Bell, Education Coordinator Hilary O’Bryan, Program Coordinator Kalas, Paul. “Circumstellar Disk Learning Site,” (2005). Retrieved July 3rd, 2006, from http://astro.berkeley.edu/~kalas/disksite/learnframes.htm. Funding Provided by NSF and the Center for Adaptive Optics Grant No. AST-9876783

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