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Discover, thanks to the ALMA protostar with a warped disc formed thousands of years ago | technology



Using Atacama (ALMA) large millimeter / subillimeter array In Chile, researchers first discovered a deformed disk around a young protostar, which was formed only a few tens of thousands of years ago.

This means that the displacement of the planetary orbits of many systems, including ours solar system, may occur as a result of early distortions of the protoplanetary disk, which produces planets

The planets of our solar system rotate around the sun in planes that are no more than 7 degrees offset from the equator of the sun itself.

For some time, it has been known that many extrasolar planets (found in planetary systems other than ours) have orbits that are not aligned in the same plane or with the equator of their central star.

One explanation for this is that some of them may have suffered collisions with other objects in the system or the influence of stars passing through or near the system, affecting their initial orbits.

However, the possibility remains that the displacement of these planets is actually due to the deformation of the cloud in which the star and the planets are born.

Recent images of protoplanetary disks, rotating gas and dust disks in which planets form around a central star have already been shown. deformationsbut it was unclear how early they appear.

A group of researchers from the Pioneer Research Cluster (CPR) of RIKEN and Chiba University in Japan, published in the journal nature his latest discoveries, describing that L1527, a young protostar, still inserted into the incubator cloud, has a disk divided into two parts: the inner part, which rotates in a plane, and the outer part, in a different plane.

The disk is very young and continues to grow. L1527 found 450 light years from Earth in the molecular cloud Taurus and is a good object of study, since its plane of rotation is almost aligned with our axis of view.

According to Nami Sakai, the leader of this study, "these observations show that it is possible that the displacement of the orbital planes may be caused by a deformed structure that arose in the very early stages of the formation of planets." We will have to explore more systems to see if this is common or not. "

It should be noted that there is still the question of what causes these deformations on the disk. Sakai offers two possible explanations: “One possibility is that the irregularities in the gas and dust flow in the protostellar cloud appear in this way in the disk; another possibility is that the magnetic field of the protostar is in a plane different from the plane of rotation of the disk, causing the inside of the disk to be different from the rest. "

Sakai also adds that they hope to identify in study future cause deformations in the disk.


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