Astronomers Finally See the Twisted Magnetic Fields That Drive Protostar Jets

Astronomers have captured the first clear view of the magnetic fields that drive protostar jets, revealing how these fields shape and launch jets. The research, published in Nature Communications, used the Atacama Large Millimeter/submillimeter Array (ALMA) to study the young binary protostar NGC 1333 IRAS 4A. The findings show that the magnetic fields are toroidal, meaning they coil around the outflows, and they are strong enough to collimate and accelerate the jets. The fields are only a few thousandths of a gauss, but in astronomical terms, they are powerful enough to influence the jets' direction and speed. The study highlights the importance of magnetic fields in the formation of protostellar winds and provides the first high-resolution observation of these fields at a scale of several hundred astronomical units from a protostar.

• The research team led by Tao-Chung Ching from the National Radio Astronomy Observatory and the Institute of Astronomy and Department of Physics at National Tsing Hua University in Taiwan.
• The magnetic fields are toroidal, coiling around the outflows and matching the gas flow's rotation.
• The fields are strong enough to collimate and accelerate the outflow at several hundred astronomical units from the protostar.
• The study provides the first high-resolution observation of milligauss-strength toroidal magnetic fields at a scale of several hundred astronomical units from a protostar.

The findings suggest that the interaction between magnetic fields and outflows is a fundamental process in star formation. The study also notes that NGC 1333 IRAS 4A is the subject of extensive research, with scientists studying its infalling gas, outflows, rotation, and turbulence. The results could extend to larger astronomical objects, such as supermassive black holes, where similar magnetic field structures may play a role in funneling material and shedding energy.

AI-generated summary of the original article — see the source for the full story.