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_Stellar black hole is also a component of gamma-ray burst, or rising in its wake, or possibly taking part in it as one of the two merging stars.

Most strongly represented in the catalogs, however, are now massive black hole. At a distance of several billion light years from Earth, astronomers observe objects called quasars. They existed shortly after the birth of the universe and produce huge amounts of energy. These objects contain black holes a billion times more massive than the Sun. They were born in the nuclei of young galaxies, and began to "devour" huge amounts of matter. Quasars close cousins ​​are other active galaxies, including radiogalaktyki in which jets produced with the participation of massive black holes extend for hundreds of thousands of light years on either side of the galaxy. The brightness of these objects results from the huge amount of energy produced during the fall of matter (accretion) in the black hole. Currently, it is assumed that the Milky Way in its center also contains a huge black hole how to lose weight fast. It has already consumed all the available near the fuel and is therefore less active. Number of known active galaxies in the SDSS is a review of several thousand, the total number of known radiosources is even higher, but most of them do not know the distance.

The exact nature of the relationship between the central black hole, which drops the matter, and surrounding the black hole forming the only galaxy is not yet well understood, and the process is probably very complex. On the one hand, surrounded by a black hole, and more precisely, in the surrounding accretion disk can form in young stars, which shine as the stars of supernovae and enrich the fabric of the galaxy in heavier elements. On the other hand, strong quasar radiation, and wind or jet accompanying the active phase is heated environment and acts as a brake on the rate of star formation still active jądra.Dżety environment created when a stream of ionized matter falls on a space object. In the case of active galaxies, quasars, and many, this object is a black hole. Falling matter rotates and creates a flattened disk, while the jets are ejected along the axis perpendicular to the plane of the disk.

It is believed that an important role in the formation and collimation of jets plays a magnetic field, interacting with the plasma, and the rotation of the disk and central object. The jet carries with him a considerable energy and can be transported great distances - in the case of galaxies, they may be the order of megaparsecs. The source of this energy is thus gravitational potential energy of gas or energy akreowanego rotation of the central object. In the first case we are dealing with an electromagnetic process, when the rotating speed of the disk Keplerowską ionized matter rises with each magnetic field lines (so-called phenomenon wmrożenia field in a plasma), the rotation induces an electric field.

Taking into account the magneto-hydrodynamic processes in the disk (transport of angular momentum), Blandford and Payne [3] replaced the speed of light speed, and proposed a model Alvfena acceleration of the jet, in a central role for the centrifugal force. In the second case, when the jet draws energy from the rapidly rotating black hole, in the process mediated by forming its environment in electron-positron pairs [4].

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