The Sun may have migrated to its current location

People have long believed that stars often wandered in the same galaxy where they formed. But recently some astrophysicists have asked the question whether this is true. New simulations have shown at least to galaxies like the Milky Way, stars like the Sun can migrate for long distances.

Besides, if our sun has moved very far from where it was formed 4 billion years ago, this will completely change the notion of galactic regions - so-called habitable areas - there are more advantages to life than other areas.

Rock Roškar, a doctoral student in astronomy at the University of Washington, said: 'Our view of the size of the settlement is based in part on the viewpoint of certain chemical components needed. for life to be present in some areas of a galaxy's disk and not other galaxies'.

'If stars migrate, that region cannot be a static place.'

If the view of the area settles is not correct, it will change scientists' understanding of how and where life can grow in the galaxy.

Roškar is the lead author in a paper published by the simulation, which was published in the Astrophysical Journal Letters on September 10. The co-authors of the paper are Thomas R. Quinn of UW University, Victor Debattista is part of the Central University of Lancashire (United Kingdom), and Gregory Stinson and James Wadsley of McMaster University (Canada). The research was partially funded by the National Science Foundation.

With over 100,000 hours of working with UW computer systems and a University of Texas supercomputer, scientists have simulated the formation and development of a galaxy disk from twisted material. together 4 billion years after the Big Bang.

Simulations began about 9 billion years ago, after our galaxy's disk-forming matter was interconnected largely, but the actual disk formation process has not yet begun. Scientists have established the basic parameters to simulate the development of the Milky Way galaxy until the time mentioned above, but then let the galaxy simulate self-development.

According to scientists' previous judgment, if a star, while rotating around the center of the galaxy, is blocked by a spiral arm of the galaxy, the star's orbit will change like The wheel swayed when it hit the pothole.

Computer simulated images represent the evolution and evolution of galaxies.(Photo: Roškar)

However, in the simulation, the orbits of some stars may change larger or smaller, but still retain their weight after colliding with strong spiral waves. Our Sun has a fairly circular orbit, this finding means that when it was formed 4.59 billion years ago (about 50 million years before the Earth's birth) it could be closer or farther away. more than the center of the galaxy compared to the position at the halfway edge as it is now.

Migrant stars also explain a long-standing problem in the interstellar substance mix in the vicinity of the solar system . This blend is more heterogeneous and thinner than expected if stars stay in place from birth to life. Because stars gather together from many different starting points, the sun's vicinity becomes more diverse and more interesting.

According to Roškar, the migration of the emperor seems to depend on the galaxy with spiral arms, like the spiral arm present in the Milky Way galaxy.

He said: 'Our simulated galaxy was idealized during disk formation, but we believe it has shown the process of forming a galaxy like the Milky Way. The study of the Miky Way is the most difficult thing because we are in it and cannot see it all. We cannot say for sure that our Sun has this type of migration. '

However, recent observations indicate that such migration can also occur in other galaxies.

Roškar emphasized that his research groups were not the first to discover the ability of stars to migrate large distances through galaxies, but they were the first to describe the effects of That migration phenomenon through simulated galaxy disk is forming.

The findings are based on a number of simulations, but additional implementations using the same parameters and physical properties will also give similar results. Wadsley, a team member at McMaster University, said: 'When you pour ice cream into a cup of coffee in a spiral, it is impossible to have two spills creating identical shapes, but the general process and The newly created taste is always the same '.

Scientists plan to conduct many simulations with varying physical properties to create many different types of galaxies, and then determine whether stars carry similar migratory abilities in the Different types of disk galaxies or not.