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A Study on the Effect of Planet and Disk Parameters on the Resulting Gap in Protoplanetary Disks

Sadeghi Ardestani, Leila | 2012

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 43753 (04)
  4. University: Sharif University of Technology
  5. Department: Physics
  6. Advisor(s): Abbasi, Shahram; Rahvar, Sohrab
  7. Abstract:
  8. The number of discovered extrasolar planetary systems has increased immensely during the past 15 years. The various outcomes of planetary formation are a result of the complicated interaction between gravitational, hydrodynamical and accretion processes a considerable amount of which is not yet understood. Thus far the effect of a planet embedded in a protoplanetary disk has been studied both analytically and using numerical simulations. These suggest that under suitable circumstances tidal effects result in the formation of a gap in the disk about the orbit of the planet. This result has been particularly used to detect massive extrasolar planets (massive enough to form gaps).In this study first the parameters governing the problem of gap formation have been identified and then the suitable parametric space to ensure the formation of a gap a protoplanetary disk is found. Next, using a widely used 2D hydrodynamic code FARGO, the effect of changing the planet and disk properties on the on the resulting gap profile and migration behavior is explored. The first aim of simulations include proving the formation of gap by a low mass planet if the system chosen from the suitable parametric space. Later the effect of changing planetary mass, accretion rate and initial distance to the central star as well as altering the amount of viscosity parameter on the resulting gap profile as well as migration behavior is investigated and the results of simulations are presented
  9. Keywords:
  10. Band Gap ; Extrasolar Planets ; Protoplanetary Disk ; Hydrodynamic Code Fargo

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