The Psyche Light Elements Investigation

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.