The discovery will allow scientists to understand the mechanism that causes the formation of black holes of different sizes
David Issachari, director of Science Forum - IOL
Chandra is an X-ray observatory located as a satellite in space. We were recently informed that it has discovered what appears to be an entire population of average-sized black holes in several star-forming galaxies. These galaxies are distinguished by a high rate of new star production and their rate of explosion.
Such objects have already been observed in the past, but the novelty is in the quantity and density of the events and their relationship to the star formation processes and more massive black holes.
At the 198th meeting of the American Astronomical Society in Pasadena, California, three separate teams reported the discovery of about a dozen X-ray sources from star-producing regions. These objects appear in Chandra with a relatively high resolution, and are ten to 1000 times more powerful than X-ray sources in our galaxy or in the neighboring M81 in the region known as "antenna" which is a pair of two colliding galaxies, and M82 for example.
These observations make it possible to analyze previous data and to better understand the processes involved in the formation of massive black holes in the centers of galaxies. These sources are a thousand times bigger than our sun and are located about 3000 light years away from the centers of the galaxies.
It has been suggested that these processes are what turn the galaxy into a quasar-like body as seen today. For example in the galaxy 3NGC 25 Chandra found a causal relationship between the activity of stars and quasars.
Chandra's findings that indicate a great variation in the ratio of the intensities of the X-rays depending on the energy, a state characteristic of the radiation of superheated gas that is accelerated and falls into a black hole. This fact, together with the general intensity, points to the possibility of the object being very large relative to stellar mass. normal". Another possibility for having a process with these characteristics is the compression of a cluster of stellar black holes.
Compared to these two proposals, Giuseppina Fabbiano offers the possibility that the radiation does not spread evenly in space, and there is a sort of "funnel" effect that directs the radiation to an area favored by us, and therefore the intensities we calculate are too high. The aforementioned "funnel" may be created by the expansion of the material, for example. Introducing this correction lowers the energy and therefore the mass of the object to only ten times that of our Sun, in line with what is known from our galaxy. In this case it is a normal process of turning a binary pair of stars into a normal black hole.
We hope that in the future more observations will clarify the picture, literally.
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