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The Psyche Light Elements Investigation.

Thomas H Prettyman1, David W Mittlefehldt2, Erik I Asphaug3

  • 1Planetary Science Institute, Tucson, AZ USA.

Space Science Reviews
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PubMed
Summary
This summary is machine-generated.

The Psyche mission will explore asteroid (16) Psyche, potentially revealing light element content in an asteroidal core. This could offer insights into the formation and composition of planetary cores, including Earth's.

Keywords:
Asteroid (16) PsycheFerrovolcanismIron meteoritesLight elementsMetal-rich chondrite meteoritesNASA Psyche missionPlanetary cores

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Area of Science:

  • Planetary Science and Geochemistry
  • Astrobiology and Space Exploration
  • Geophysics and Core Dynamics

Background:

  • Light elements (C, S, Si, O, H) are crucial for Earth's liquid outer core, influencing its state and geodynamic processes.
  • The identity, abundance, and delivery mechanisms of light elements in planetary cores remain poorly understood.
  • Asteroid (16) Psyche offers a unique opportunity to study the core of a differentiated planetesimal.

Purpose of the Study:

  • To assess the light element content of an asteroidal core using the Psyche mission.
  • To compare the composition of (16) Psyche's core with inferred compositions of planetary cores.
  • To investigate the role of light elements in planetesimal core formation and evolution.

Main Methods:

  • Exploration of asteroid (16) Psyche by the NASA Psyche spacecraft.
  • Utilizing instruments such as a Gamma Ray and Neutron Spectrometer, Multispectral Imager, and Magnetometer.
  • Conducting gravity and geomorphology investigations to constrain interior composition and processes.

Main Results:

  • Trace element systematics and mineral composition of magmatic iron meteorites suggest C, P, and S in planetesimal cores.
  • These elements influence core dynamics, dynamo generation, and separation via ferrovolcanism upon crystallization.
  • Psyche's instruments will detect elemental, mineral, and magnetic signatures related to light elements.

Conclusions:

  • The Psyche mission can provide direct evidence of light element content in an asteroidal core.
  • Findings will enhance understanding of core formation processes in planetesimals versus Earth.
  • This research contributes to understanding the origin and evolution of metal-rich bodies.