A rare success: Hubble telescope could directly observe the agent, is drawn into the bowels of the black hole, and find new nuances of the life of the amazing objects - quasars.
It is known that the attraction of large cosmic bodies bends the direction of light propagation. This effect is similar to the curvature of the light beam normal lens, which is why is called gravitational lensing. Today, astronomers know a lot of gravitational lenses, and often they are used as well as usual, in order to ...
It did so, and working with optical orbiting telescope Hubble scientists are exploring a distant quasar. Recall that quasars are extremely powerful and vividly radiant centers of active galaxies, and more specifically - a substance falling into the depths of them located in the supermassive black holes. Dispersed and the Haskalah, it emits is often hundreds of times brighter than the stars of the galaxy.
Unfortunately - or perhaps fortunately - almost all of these super- objects are at very great distances from Earth, making them extremely difficult to secure observation. Accretion disk that serves as a radiation source quasar shines very brightly, but the size it usually is not more than a few light- days, about 100 billion miles in diameter. What is the distance of the order of billions of light years makes even quasars is almost invisible to our instruments.
That's why seeing them and you have to resort to various tricks, as it was in the new study on the quasar HE 1104-1805. Located between them and our Galaxy has increased the visible image of the object, allowing a team of astronomers from the United States and Spain, just to ...
It is interesting that the quasar HE 1104-1805 as a result of lensing can be seen in the pictures twice, and two of his images are slightly different in color. This is due to the fact that the way in which the light was moving, creating each image, was his own, and, passing through different areas of the galaxy, in different ways to absorb and reflect its substance. But in the end it is possible to restore the original colors of the accretion disk, changing from its center to the edges. This palette is determined by the temperature of the material constituting the disk: it is, of course, decreases with increasing distance from the center located in a black hole - and the colors go to the red spetstra. In addition, it was possible to measure the size of the disk, and by showing that they constitute 100-300 billion miles. The light will overcome this distance for a day.
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