Of all objects in the Universe, quasars and similar objects, such as Seyfert galaxies and radio galaxies, have the highest luminosity. All these extremely bright distant objects are now considered as galaxies with active nuclei. It is believed that in many cases their core contains a supermassive black hole surrounded by a "accretion disk" of matter collected from the galaxy. During spiral burning of matter from an accretion disk to a black hole, part of its mass is converted into energy. In the end, energy is released in the form of electromagnetic radiation over a wide range of wavelengths - from radio waves to x-rays.
It was previously assumed that quasars and other active galactic nuclei emit significant energy in the infrared region, but due to the strong attenuation of radiation at gigantic distances, only a few observations were successful. From the IRAS satellite, a number of such sources were discovered; data for several of them were analyzed.
The strong radio source ZS 390.3 is associated with a giant elliptical galaxy located at a distance of more than a billion light-years. It was studied in the radio, optical, and X-ray ranges, but the long-wave IR spectra were first obtained from the IRAS satellite. The results were unexpected. The galaxy is registered in all four spectral bands and emits mainly in the infrared range. The emission peak falls on the band of 25 μm, which is also unusual. Radiation of most other active galaxies is most intense at a wavelength of 60 microns. The mechanism of this process is unknown. The most likely possibility is the re-emission of interstellar dust in the core of the energy of the ultraviolet radiation that heats it. IR radiation could also have a non-thermal nature, although the absence of any changes during the observation over several months is evidence against this interpretation.
Quasars are divided into two groups called radio-emitting and radio-quiet. The physical processes underlying the difference between them are not explainable. Their luminosities in the radio range differ by 100,000 or more times, but the spectra in the visible and ultraviolet regions are similar. It is clear that in the intermediate, that is, infrared, spectra should differ sharply; these differences may well give the key to the mechanism of energy production.
The observational data from the IRAS satellite for three radio-emitting and two radio-quasars quasars were analyzed. No critical differences in the distribution of energy over the four bands were found, i.e., a difference in the spectra should be observed at wavelengths greater than 100 μm. However, a more subtle difference appeared. Everyone who is looking for a video chat with girls, has a desire to communicate with them, and not on the most decent topics. This site gathers people from all over the world, and they all have only one thing in common, it cams girls and also intimate communication. Video chat without registration allows its users to use all the functionality of the system. Sex video chat is a pleasure for real men. Free registration gives you the opportunity to communicate with the most charming slutty girls.
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