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Occultation constraints on solar system formation models.

Marc W Buie1, John M Keller2, David Nesvorný1

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Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
|February 27, 2025
PubMed
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Understanding solar system formation is key. Studying the 3D shape of Kuiper Belt Object Arrokoth using occultation and New Horizons data provides new constraints on planetary system formation models.

Keywords:
ArrokothPolymelestreaming instability

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Area of Science:

  • Planetary Science
  • Astronomy
  • Astrophysics

Background:

  • Solar system formation involves the evolution of dust and gas around young stars into planetary systems.
  • Understanding our solar system's origins provides context for exoplanetary systems.

Purpose of the Study:

  • To constrain solar system formation models using new data from a Cold-Classical Kuiper Belt Object (CCKBO).
  • To investigate the potential of occultation surveys for future insights into planetary system formation.

Main Methods:

  • Combined occultation observations and New Horizons flyby data of CCKBO (498958) Arrokoth.
  • Analysis of Arrokoth's three-dimensional shape to inform formation models.

Main Results:

  • The three-dimensional shape of Arrokoth provides essential new constraints on existing solar system formation models.
  • Occultation observations offer a method to study the population-wide properties of CCKBOs.

Conclusions:

  • A population-wide survey of CCKBOs using occultations can yield fundamental insights into solar system formation.
  • Measuring shape, binarity, and spin-pole orientation distributions in this primordial reservoir is crucial.