Scientists talked about the role of magnetism in the formation of the Sun

Microscopic particles in the ancient meteorite have preserved traces of the magnetic field that existed in the first 200 thousand years of the formation of the Solar system. The discovery indicates that it wasn't just gravity that was involved in the birth of the Sun and planets. This was reported in the magazine on August 24. Phys.org .

Scientists have studied the DOM 08006 meteorite, discovered in 2008 in the Dominion Mountain Range in East Antarctica. The sample is considered one of the most primitive known meteorites: over billions of years, its minerals and initial chemical composition have changed less than most similar cosmic bodies.

The researchers isolated calcium-aluminum inclusions inside the meteorite. These particles originated during the first 200,000 years of the Solar System's existence and are considered to be the oldest available substance formed within its boundaries.

Some inclusions contained iron and other minerals capable of retaining residual magnetization. The scientists conducted a series of measurements and found traces of a magnetic field with a power of 150 to 600 microtesla in the particles. This is about three to 12 times the strength of the modern Earth's magnetic field.

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Benjamin Weiss, Professor of Earth and Planetary Sciences at MIT, noted that the transition from a spherical cloud to a protoplanetary disk was one of the most important events in the history of the Solar system. According to him, the measurements show that along with gravity, magnetism was probably involved in this process.

The magnetic field could be caused by the movement of charged particles in a cloud of gas and dust. The researchers suggest that it helped direct gas from the protoplanetary disk to its center, where the Sun was forming.

Previously, scientists had already found evidence of the existence of a magnetic field about 2 million years after the beginning of the formation of the Solar system. By this time, the Sun probably already existed, and the planets were just beginning to form. The new finding pushes back the known history of magnetism to a much earlier period, when the central star was still being formed from the surrounding matter.

The authors emphasize that gravity was still one of the main factors. However, models of the formation of the Sun and planets, in their opinion, should also take into account the movement of matter under the influence of a magnetic field.

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