Astronomers have figured out what the sun looked like in youth

Astronomers have figured out what the sun looked like in youth
Astronomers have figured out what the sun looked like in youth
Anonim

American astronomers have studied the structure of hot spots on the surface of the young star GM Aur, located 450 million light years from Earth in the constellation Auriga, thus getting closer to understanding how our solar system was formed and what the sun looked like at the same age. An article about this was published in the journal Nature.

During the formation of a young star, it actively absorbs dust and gas particles from the surrounding protoplanetary disk. “This is the same process that the Sun went through,” says lead author of the article, Catherine Espilat of Boston University. When, in the course of this accretion, particles falling onto the star collide with its surface, hot spots arise in these places. Computer models predicting their appearance were based on algorithms that helped to find out exactly where on the surface of growing stars particles are directed from protoplanetary disks. Their movement is determined by the structure of the young star's magnetic fields.

Modern telescopes do not yet allow photographing the surface of such a distant star in all details, however, the data obtained in the X-ray, ultraviolet, infrared and visible ranges from the Hubble space telescopes, TESS (Transiting Exoplanet Survey Satellite, designed for the discovery of exoplanets by the transit method), the Swift apparatus and The Las Campanas Observatory has confirmed the veracity of accretion models and hot spot predictions. The star GM Aur makes a full revolution in about one week, the observed brightness levels of certain spots on the side visible from the Earth increase and decrease during this time, which even makes it possible to reveal some irregularities inside individual spots with low and high temperatures and determine their shape.

Ultimately, the protoplanetary disks scatter, leaving behind the stars, planets, and other space objects that make up the star system. Thus, studying young stars with similar properties to our Sun becomes the key to understanding the origin of our own planetary system.

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