Photo: Pete Wheeler / ICRAR
Scientists at the University kertina (Australia) has investigated the sources of fast radio bursts and found that they are not observed at low frequencies. The exact cause of this phenomenon is still unknown. About it reported in a press release on Phys.org.
Quick radar pulse lasts for several milliseconds and emits into space huge amounts of energy — what the Sun emits within a few tens of thousands of years. One hypothesis suggests that this phenomenon is due to the activities of alien civilizations. Some scientists say that such bursts may result from catastrophic events, such as celebrity deaths.
Astronomers searched for sources of fast radio bursts with ASKAP radio and antenna Murchison Widefield Array (MWA). The first tool capable of detecting the radiation in the frequency range 700-1800 MHz (MHz) and the second 80-300 MHz. ASKAP has recorded several bright sources of fast radio bursts at the frequency of 1.4 GHz, and MWA did not see them, but was directed to the same region of the sky.
According to scientists, this result cannot be explained by the phenomenon of pulse broadening that occurs due to scattering of radio waves. The other possible explanation could be the absorption of electromagnetic radiation as it passes through a dense medium in the vicinity of the source. Another hypothesis is that through the process of scintillation has increased the frequency of the signal to values that was ASKAP.
Video, photo All from Russia.