For radio-emitting sources, the IR data fits well into the rectilinear interpolation between the visible area and the radio range. For radio-quiet quasars, a similar line connecting these two spectral regions should have a steeper slope, since the IR radiation flux decreases faster with increasing wavelength. Measurements of radio—quiet sources cannot be "adjusted" to such a line - excessive radiation is observed at a wavelength of 100 microns.
Any explanation of these results is still preliminary, but there is a possibility that the excess radiation at a wavelength of 100 microns is directly related to the nature of the quasar energy source.
It is believed that the main radiation of quasars is synchrotron; it is generated by high-energy electrons moving in a spiral in magnetic fields. The main source of such electrons may be emissions of matter from the nucleus. The absence of any discontinuities in the spectrum of radio-emitting quasars suggests that all received radiation is due to this mechanism. The excess IR radiation from radio-quiet quasars may have a different origin; for example, it may be caused by thermal emission of dust in the galaxy surrounding the core. Therefore, it can be assumed that radio-quiet quasars may contain more dust than radio-emitting ones. Dust may be responsible for differences in radio luminance, as it destroys electron beams.
Although the observations from the IRAS satellite ended a year ago, the project has not yet been completed. The publication this month of a catalog of point sources and atlases of extended radiation will make the data widely available to astronomers. Their analysis and interpretation will continue for several more years. Most of the information received by the IRAS satellite is recorded on magnetic tapes, storing data that is unknown even to the most dedicated to the project. The tapes will remain as a reference archive for astronomers, similar to photographic plates in optical viewing.
The main function of a complete astronomical survey is the discovery of new physical phenomena or objects awaiting more detailed study in a given range or in the entire electromagnetic spectrum.
Further work beyond the IR field and some IR observations can be carried out from the Ground or on aircraft telescopes, and the first such studies are already underway. However, for the most interesting sources, long-wavelength infrared measurements will have to be carried out in space.
In the 90s, two instruments were designed for such observations. The European Space Agency (ISA) will launch an infrared space observatory, and NASA will launch an infrared space telescope laboratory on an orbiting aircraft. These instruments will have higher spatial and spectral resolution and sensitivity than the IRAS satellite. If both projects are as successfully completed as the flight of the discoverer satellite, infrared astronomy will have truly brilliant opportunities. Claim your bonus now at bonus-rich non UK casino made for real players.
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