Unique Chemical Composition Surrounding Supermassive Black Holes
The spiral galaxy NGC 107 was observer with ALMA, an astronomical interferometer of radio telescopes in the Atacama desert of northern Chile, an this revealed an intense emissions from dust around the central black hole in the center of NGC 107. This "Dust" was revealed to be a unique chemical composition characterized by enhancement of hydrogen cyanide (HCN) around the black hole which is possible thanks to the high temperature heating of the environment around the black hole. Recent research has reveals that many galaxies contain supermassive black holes at their center and that the mass of a supermassive black hole is approximately proportional to that of the central part of the galaxy. However, the first thing we need to do is to confirm the existence of a black hole at the galactic center by observation. There have been several explorations of black holes with a optical/infrared spectra, but the problem it that infrared spectra have a low frequency and a long wavelength which are absorbed by interstellar dust particles although the more active black holes contain more dust particles. For that reason it has been establish a better method using molecular/atomic emissions that can been observer at millimeter/submillimeter wavelengths with are susceptible to dust absorption. The importance of the HCN is high because his molecular line emissions is within the millimeter/submillimeter wavelength which makes is possible to be observable with ALMA. Although, the emission frequency becomes lower due to the expansion to the universe ALMA is designed to receive millimeter waves in a frequency range lower than submillimeter waves observed this time, which means this identification method can be applied to objects even 10 billion light years away. This production of HCN would be impossible to maintain by themselves; the best explain to such high temperatures are black holes since the have an indefinite...
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