Paleomagnetic evidence for a nebular magnetic field from calcium-aluminum-rich inclusionsOPEN ACCESS 

· by · in , , , , , ,

Cauê S. Borlina, Benjamin P. Weiss, Xue-Ning Bai, Po-Yen Tung, Richard J. Harrison, Elias N. Mansbach, Nilanjan Chatterjee, François L. H. Tissot, and Kevin D. McKeegan

PNAS, Vol. 123 | No. 36, 24 August 2026

LINK (OPEN ACCESS)
PDF (OPEN ACCESS)

“The initial stage of planet formation is expected to take place in a nascent protoplanetary disk (PPD) accreting onto the protostar embedded in an infalling envelope. This stage is likely accompanied by the formation of high-condensation temperature solids resembling calcium-aluminum-rich inclusions (CAIs), the oldest known solar system solids. However, it is unknown whether magnetism and/or gravity dominantly drove accretion in the youngest evolutionary stages of PPDs and the solar nebula. Here we report paleomagnetic measurements of CAIs indicating that they record a nebular magnetic field of ∼150 to 600 μT. This intensity is consistent with magnetic fields playing a key role driving disk accretion while also heating the very inner disk to 103 K at the earliest stages of solar system formation.”

Related posts (automatically generated):

  1. Paleomagnetic evidence for a disk substructure in the early solar systemOPEN ACCESS 
  2. Earliest Evidence of Nebular Shock Waves Recorded in a Calcium-Aluminum-rich Inclusion
  3. Lifetime of the Outer Solar System Nebula from Carbonaceous ChondritesOPEN ACCESS 
  4. Rock magnetic characterization of returned samples from asteroid (162173) Ryugu: Implications for paleomagnetic interpretation and paleointensity estimation
  5. Calcium–aluminum-rich inclusions in non-carbonaceous chondrites: Abundances, sizes, and mineralogyOPEN ACCESS 
  6. Petrology and oxygen isotopic compositions of calcium‐aluminum‐rich inclusions in primitive CO3.0‐3.1 chondrites
  7. Ultra-refractory metal assemblages in calcium-aluminum-rich inclusions: Probes of the inner solar protoplanetary disk
  8. A petrologic and microstructural study of a compact type A calcium-aluminum-rich inclusion from the Northwest Africa 5028 CR2 chondrite: Implications for nebular and parent-body processes
  9. The bright-field grinding tomography of coarse-grained calcium‑aluminum-rich inclusions in the Allende meteorite
  10. MINERALOGY, PETROGRAPHY, AND OXYGEN AND ALUMINUM-MAGNESIUM ISOTOPE SYSTEMATICS OF GROSSITE-BEARING REFRACTORY INCLUSIONS
Tags: , , , , , , , , , ,