Predicting the frequencies of diverse exo-planetary systems

J. S. Greaves, D. A. Fischer, M. C. Wyatt, C. A. Beichman, G. Bryden

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

Extrasolar planetary systems range from hot Jupiters out to icy comet belts more distant than Pluto. We explain this diversity in a model where the mass of solids in the primordial circumstellar disc dictates the outcome. The star retains measures of the initial heavy-element (metal) abundance that can be used to map solid masses on to outcomes, and the frequencies of all classes are correctly predicted. The differing dependences on metallicity for forming massive planets and low-mass cometary bodies are also explained. By extrapolation, around two-thirds of stars have enough solids to form Earth-like planets, and a high rate is supported by the first detections of low-mass exo-planets.

Original languageEnglish
Number of pages5
JournalMonthly Notices of the Royal Astronomical Society
Volume378
DOIs
Publication statusPublished - 11 Jun 2007

Keywords

  • circumstellar matter
  • planetary systems : formation
  • planetary systems : protoplanetary discs
  • MAIN-SEQUENCE STARS
  • T-TAURI STARS
  • EXTRASOLAR PLANETS
  • GIANT PLANETS
  • DEBRIS DISCS
  • KUIPER-BELT
  • HOST STARS
  • METALLICITY
  • JUPITER
  • SEARCH

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