A baby star grows near the galaxy’s central black hole

A star very young in the formation phase was unexpectedly discovered near huge black hole Sagittarius A star (Sergeant A*), at the center of our Milky Way.

star he is only a few tens of thousands of years old, which makes him younger than humanity. Peculiarity star Baby X3a is that, theoretically, it should not exist so close to huge black hole.

However, the team believes that it was formed in a cloud of dust orbiting the Earth. black hole giant and descended into its current orbit only after it formed. The study was published in Astrophysical journal.

challenge theories

In general, it is believed that the vicinity of black hole located at the center of our Galaxy, are a region characterized by highly dynamic processes and strong ultraviolet and X-ray radiation. It is these conditions that act against education stars like our sun. For this reason, scientists have long assumed that over periods of billions of years, only stars old and evolved can settle due to dynamic friction near huge black hole.

However, surprisingly, twenty years ago they found stars very young around Sergeant A*. It is not yet clear how they got there. stars or where they originated. Appearance stars very young very close to huge black hole this has been called the “paradox of youth”.

baby star X3a – which is ten times larger and fifteen times heavier than our Sun – can now close the gap between star formation and young stars in the vicinity Sergeant A*. X3a it needs special conditions to form near a black hole.

The first author, Dr. Florian Peisker, explained in his statement: “It turns out that there is a region several light-years away from black hole which corresponds to the formation conditions stars. This region, a ring of gas and dust, is cool enough to be protected from damaging radiation.”

Low temperatures and high density create an environment in which clouds hundreds of solar masses can form. In principle, these clouds can move very quickly in the direction of the black hole due to cloud collisions and scattering, which eliminates angular momentum.

In addition, very hot cumulus clouds formed near the center. little Star which can be consumed X3a. These cumulus clouds can also contribute X3a achieve such a large mass. However, these clusters are only part of the history of the formation X3a. They still do not explain their “birth”.

Scientists suggest the following hypothesis is possible: protected from gravitational influence Sergeant A* and due to intense radiation in the outer ring of gas and dust surrounding the center of the Galaxy, a fairly dense cloud could form. This cloud had a mass of about a hundred suns and, under the influence of its own gravity, collapsed into one or more protostars.

“This estimated time of fall roughly corresponds to the age X3aPeisker added. Observations have shown that there are many such clouds that can interact with each other. Therefore, the cloud is likely to fall to the side black hole from time to time.

This scenario would also correspond to the stellar phase of development X3a, which is currently being developed in the direction star mature. Therefore, it is likely that the ring of gas and dust acts as a birthplace for young stars at the center of our galaxy. (Europe Press)

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