Early Solar System Magnetism and its Implications for Planet Formation: Insights from Meteorite Paleomagnetism and Solar Physics
Abstract
Paleomagnetic measurements of ancient meteoritic materials have placed important constraints on the early evolution of the solar system, including determining the intensity of the nebular magnetic field, the lifetime of the nebular gas, and the strength of the early solar wind of the T Tauri Sun. Furthermore, meteorite paleomagnetic records of core dynamo activity constrains the timing and duration of planetesimal accretion and the planetesimal thermal evolution. Here we review the important discoveries offered by meteorite paleomagnetism, examining the pre- and post- accretional magnetization of stony meteorites. We use the available data to reconstruct a timeline of magnetic fields in the early solar system from the birth of the solar system up to 10 My after its formation. We demonstrate how independent predictions from the fields of stellar astrophysics and paleomagnetism provide similar upper limits on the early solar wind magnetic field. Using numerical simulations, we show that the bulk magnetization found in some chondritic meteorites is not a record of the solar wind but likely a record of an asteroidal dynamo. Finally, we discuss future studies that can be performed using the new multidisciplinary approach of meteorite paleomagnetism and solar physics.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2017
- Bibcode:
- 2017AGUFM.P53F..08O
- Keywords:
-
- 6024 Interiors;
- PLANETARY SCIENCES: COMETS AND SMALL BODIES;
- 6040 Origin and evolution;
- PLANETARY SCIENCES: COMETS AND SMALL BODIES;
- 5430 Interiors;
- PLANETARY SCIENCES: SOLID SURFACE PLANETS;
- 5455 Origin and evolution;
- PLANETARY SCIENCES: SOLID SURFACE PLANETS